Mercurial > genshi > mirror
annotate genshi/template/eval.py @ 896:8ae2c1765068 trunk
Fix for infinite recursion when parsing argument names from tuples. Closes #383.
author | cmlenz |
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date | Wed, 21 Apr 2010 22:02:28 +0000 |
parents | c8cac1b264e4 |
children | 64f04a2c5e66 |
rev | line source |
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336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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1 # -*- coding: utf-8 -*- |
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2 # |
854
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More work on reducing the size of the diff produced by 2to3.
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3 # Copyright (C) 2006-2009 Edgewall Software |
336
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4 # All rights reserved. |
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5 # |
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6 # This software is licensed as described in the file COPYING, which |
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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7 # you should have received as part of this distribution. The terms |
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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8 # are also available at http://genshi.edgewall.org/wiki/License. |
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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9 # |
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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10 # This software consists of voluntary contributions made by many |
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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11 # individuals. For the exact contribution history, see the revision |
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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12 # history and logs, available at http://genshi.edgewall.org/log/. |
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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13 |
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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14 """Support for "safe" evaluation of Python expressions.""" |
7763f7aec949
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
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15 |
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cmlenz
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16 import __builtin__ |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
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793
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17 |
601
59fbd7586454
Simplify implementation of `py:with` directive by compiling to a `Suite`, instead of manually breaking up the statement and compiling each part to an `Expression`. Also, the first line of code in a `Suite` is now stored as the "function name" of the bytecode, so that it shows up in tracebacks.
cmlenz
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18 from textwrap import dedent |
793 | 19 from types import CodeType |
357
62de137b9322
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
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20 |
401
68772732c896
Make the `Markup` class available by default in template expressions. Closes #67.
cmlenz
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21 from genshi.core import Markup |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
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22 from genshi.template.astutil import ASTTransformer, ASTCodeGenerator, \ |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
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793
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23 _ast, parse |
418
c478a6fa9e77
Make expression error handling more strict. Closes #88.
cmlenz
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24 from genshi.template.base import TemplateRuntimeError |
357
62de137b9322
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
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25 from genshi.util import flatten |
336
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26 |
442
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Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option.
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27 __all__ = ['Code', 'Expression', 'Suite', 'LenientLookup', 'StrictLookup', |
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Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option.
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28 'Undefined', 'UndefinedError'] |
425
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29 __docformat__ = 'restructuredtext en' |
336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
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30 |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
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793
diff
changeset
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31 |
731
01bdf155db95
Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
cmlenz
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32 # Check for a Python 2.4 bug in the eval loop |
739 | 33 has_star_import_bug = False |
731
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Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
cmlenz
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34 try: |
736 | 35 class _FakeMapping(object): |
731
01bdf155db95
Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
cmlenz
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36 __getitem__ = __setitem__ = lambda *a: None |
01bdf155db95
Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
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37 exec 'from sys import *' in {}, _FakeMapping() |
739 | 38 except SystemError: |
731
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Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
cmlenz
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39 has_star_import_bug = True |
01bdf155db95
Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
cmlenz
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40 del _FakeMapping |
01bdf155db95
Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
cmlenz
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41 |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
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793
diff
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42 |
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Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
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43 def _star_import_patch(mapping, modname): |
01bdf155db95
Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
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44 """This function is used as helper if a Python version with a broken |
01bdf155db95
Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
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45 star-import opcode is in use. |
01bdf155db95
Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
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46 """ |
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Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
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47 module = __import__(modname, None, None, ['__all__']) |
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Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
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48 if hasattr(module, '__all__'): |
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Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
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49 members = module.__all__ |
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Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
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50 else: |
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Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
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51 members = [x for x in module.__dict__ if not x.startswith('_')] |
733
43147cbc9ea3
Update to r855 for Python 2.3 support. Fixes #221 (hopefully).
athomas
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52 mapping.update([(name, getattr(module, name)) for name in members]) |
731
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Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
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53 |
336
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54 |
405
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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55 class Code(object): |
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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56 """Abstract base class for the `Expression` and `Suite` classes.""" |
565
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* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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57 __slots__ = ['source', 'code', 'ast', '_globals'] |
405
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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58 |
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Changed the default error handling mode to "strict".
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59 def __init__(self, source, filename=None, lineno=-1, lookup='strict', |
604
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Fix bug that slipped into [717]: the code of a `py:with` directive was not being compiled with AST transformations applied.
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60 xform=None): |
405
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61 """Create the code object, either from a string, or from an AST node. |
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62 |
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63 :param source: either a string containing the source code, or an AST |
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64 node |
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65 :param filename: the (preferably absolute) name of the file containing |
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66 the code |
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67 :param lineno: the number of the line on which the code was found |
442
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Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option.
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68 :param lookup: the lookup class that defines how variables are looked |
606
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Changed the default error handling mode to "strict".
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69 up in the context; can be either "strict" (the default), |
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Changed the default error handling mode to "strict".
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70 "lenient", or a custom lookup class |
604
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Fix bug that slipped into [717]: the code of a `py:with` directive was not being compiled with AST transformations applied.
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71 :param xform: the AST transformer that should be applied to the code; |
416e46209da1
Fix bug that slipped into [717]: the code of a `py:with` directive was not being compiled with AST transformations applied.
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72 if `None`, the appropriate transformation is chosen |
416e46209da1
Fix bug that slipped into [717]: the code of a `py:with` directive was not being compiled with AST transformations applied.
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73 depending on the mode |
405
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74 """ |
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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75 if isinstance(source, basestring): |
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76 self.source = source |
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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77 node = _parse(source, mode=self.mode) |
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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78 else: |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
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79 assert isinstance(source, _ast.AST), \ |
601
59fbd7586454
Simplify implementation of `py:with` directive by compiling to a `Suite`, instead of manually breaking up the statement and compiling each part to an `Expression`. Also, the first line of code in a `Suite` is now stored as the "function name" of the bytecode, so that it shows up in tracebacks.
cmlenz
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80 'Expected string or AST node, but got %r' % source |
405
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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81 self.source = '?' |
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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82 if self.mode == 'eval': |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
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83 node = _ast.Expression() |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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84 node.body = source |
405
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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85 else: |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
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86 node = _ast.Module() |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
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87 node.body = [source] |
405
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Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
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88 |
565
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* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
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89 self.ast = node |
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90 self.code = _compile(node, self.source, mode=self.mode, |
604
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Fix bug that slipped into [717]: the code of a `py:with` directive was not being compiled with AST transformations applied.
cmlenz
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91 filename=filename, lineno=lineno, xform=xform) |
442
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Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option.
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92 if lookup is None: |
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Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option.
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93 lookup = LenientLookup |
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94 elif isinstance(lookup, basestring): |
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Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option.
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95 lookup = {'lenient': LenientLookup, 'strict': StrictLookup}[lookup] |
654
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Fix thread-safety problem in template code evaluation. Closes #158. Thanks to Christian Boos for the patch.
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96 self._globals = lookup.globals |
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97 |
715 | 98 def __getstate__(self): |
99 state = {'source': self.source, 'ast': self.ast, | |
100 'lookup': self._globals.im_self} | |
101 c = self.code | |
102 state['code'] = (c.co_nlocals, c.co_stacksize, c.co_flags, c.co_code, | |
103 c.co_consts, c.co_names, c.co_varnames, c.co_filename, | |
104 c.co_name, c.co_firstlineno, c.co_lnotab, (), ()) | |
105 return state | |
106 | |
107 def __setstate__(self, state): | |
108 self.source = state['source'] | |
109 self.ast = state['ast'] | |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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110 self.code = CodeType(0, *state['code']) |
715 | 111 self._globals = state['lookup'].globals |
112 | |
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113 def __eq__(self, other): |
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114 return (type(other) == type(self)) and (self.code == other.code) |
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115 |
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116 def __hash__(self): |
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117 return hash(self.code) |
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118 |
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119 def __ne__(self, other): |
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120 return not self == other |
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121 |
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122 def __repr__(self): |
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123 return '%s(%r)' % (type(self).__name__, self.source) |
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124 |
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125 |
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126 class Expression(Code): |
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127 """Evaluates Python expressions used in templates. |
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128 |
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129 >>> data = dict(test='Foo', items=[1, 2, 3], dict={'some': 'thing'}) |
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130 >>> Expression('test').evaluate(data) |
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131 'Foo' |
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132 |
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133 >>> Expression('items[0]').evaluate(data) |
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134 1 |
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135 >>> Expression('items[-1]').evaluate(data) |
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136 3 |
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137 >>> Expression('dict["some"]').evaluate(data) |
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138 'thing' |
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139 |
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140 Similar to e.g. Javascript, expressions in templates can use the dot |
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141 notation for attribute access to access items in mappings: |
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142 |
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143 >>> Expression('dict.some').evaluate(data) |
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144 'thing' |
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145 |
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146 This also works the other way around: item access can be used to access |
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147 any object attribute: |
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148 |
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149 >>> class MyClass(object): |
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150 ... myattr = 'Bar' |
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151 >>> data = dict(mine=MyClass(), key='myattr') |
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152 >>> Expression('mine.myattr').evaluate(data) |
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153 'Bar' |
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154 >>> Expression('mine["myattr"]').evaluate(data) |
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155 'Bar' |
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156 >>> Expression('mine[key]').evaluate(data) |
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157 'Bar' |
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158 |
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159 All of the standard Python operators are available to template expressions. |
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160 Built-in functions such as ``len()`` are also available in template |
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161 expressions: |
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162 |
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163 >>> data = dict(items=[1, 2, 3]) |
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164 >>> Expression('len(items)').evaluate(data) |
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165 3 |
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166 """ |
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167 __slots__ = [] |
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168 mode = 'eval' |
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169 |
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170 def evaluate(self, data): |
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171 """Evaluate the expression against the given data dictionary. |
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172 |
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173 :param data: a mapping containing the data to evaluate against |
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174 :return: the result of the evaluation |
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175 """ |
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176 __traceback_hide__ = 'before_and_this' |
691 | 177 _globals = self._globals(data) |
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178 return eval(self.code, _globals, {'__data__': data}) |
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179 |
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180 |
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181 class Suite(Code): |
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182 """Executes Python statements used in templates. |
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183 |
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184 >>> data = dict(test='Foo', items=[1, 2, 3], dict={'some': 'thing'}) |
473 | 185 >>> Suite("foo = dict['some']").execute(data) |
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186 >>> data['foo'] |
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187 'thing' |
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188 """ |
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189 __slots__ = [] |
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190 mode = 'exec' |
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191 |
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192 def execute(self, data): |
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193 """Execute the suite in the given data dictionary. |
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194 |
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195 :param data: a mapping containing the data to execute in |
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196 """ |
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197 __traceback_hide__ = 'before_and_this' |
691 | 198 _globals = self._globals(data) |
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199 exec self.code in _globals, data |
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200 |
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201 |
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202 UNDEFINED = object() |
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203 |
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204 |
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205 class UndefinedError(TemplateRuntimeError): |
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206 """Exception thrown when a template expression attempts to access a variable |
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207 not defined in the context. |
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208 |
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209 :see: `LenientLookup`, `StrictLookup` |
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210 """ |
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211 def __init__(self, name, owner=UNDEFINED): |
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212 if owner is not UNDEFINED: |
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213 message = '%s has no member named "%s"' % (repr(owner), name) |
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214 else: |
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215 message = '"%s" not defined' % name |
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216 TemplateRuntimeError.__init__(self, message) |
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217 |
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218 |
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219 class Undefined(object): |
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220 """Represents a reference to an undefined variable. |
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221 |
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222 Unlike the Python runtime, template expressions can refer to an undefined |
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223 variable without causing a `NameError` to be raised. The result will be an |
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224 instance of the `Undefined` class, which is treated the same as ``False`` in |
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225 conditions, but raise an exception on any other operation: |
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226 |
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227 >>> foo = Undefined('foo') |
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228 >>> bool(foo) |
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229 False |
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230 >>> list(foo) |
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231 [] |
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232 >>> print(foo) |
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233 undefined |
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234 |
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235 However, calling an undefined variable, or trying to access an attribute |
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236 of that variable, will raise an exception that includes the name used to |
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237 reference that undefined variable. |
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238 |
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239 >>> foo('bar') |
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240 Traceback (most recent call last): |
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241 ... |
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242 UndefinedError: "foo" not defined |
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243 |
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244 >>> foo.bar |
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245 Traceback (most recent call last): |
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246 ... |
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247 UndefinedError: "foo" not defined |
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248 |
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249 :see: `LenientLookup` |
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250 """ |
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251 __slots__ = ['_name', '_owner'] |
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252 |
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253 def __init__(self, name, owner=UNDEFINED): |
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254 """Initialize the object. |
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255 |
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256 :param name: the name of the reference |
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257 :param owner: the owning object, if the variable is accessed as a member |
418
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258 """ |
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259 self._name = name |
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260 self._owner = owner |
336
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Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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261 |
442
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262 def __iter__(self): |
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263 return iter([]) |
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264 |
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265 def __nonzero__(self): |
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266 return False |
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267 |
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268 def __repr__(self): |
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A bit of cleanup of the `Markup` Python implementation.
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269 return '<%s %r>' % (type(self).__name__, self._name) |
442
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270 |
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271 def __str__(self): |
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272 return 'undefined' |
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273 |
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274 def _die(self, *args, **kwargs): |
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275 """Raise an `UndefinedError`.""" |
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276 __traceback_hide__ = True |
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277 raise UndefinedError(self._name, self._owner) |
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278 __call__ = __getattr__ = __getitem__ = _die |
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279 |
878
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Apply patch from #324 for Python 2.6.2 compatibility fix.
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280 # Hack around some behavior introduced in Python 2.6.2 |
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281 # http://genshi.edgewall.org/ticket/324 |
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282 __length_hint__ = None |
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283 |
442
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284 |
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285 class LookupBase(object): |
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286 """Abstract base class for variable lookup implementations.""" |
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287 |
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288 @classmethod |
691 | 289 def globals(cls, data): |
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290 """Construct the globals dictionary to use as the execution context for |
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291 the expression or suite. |
418
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292 """ |
442
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293 return { |
691 | 294 '__data__': data, |
442
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295 '_lookup_name': cls.lookup_name, |
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296 '_lookup_attr': cls.lookup_attr, |
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Fix for augmented assignments to local variables. Thanks to Erik Bray for reporting the problem.
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297 '_lookup_item': cls.lookup_item, |
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Workaround for a Python 2.4 bug that broke star imports in template code blocks. Closes #221. Many thanks to Armin Ronacher for the patch.
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298 '_star_import_patch': _star_import_patch, |
691 | 299 'UndefinedError': UndefinedError, |
442
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300 } |
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301 |
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302 @classmethod |
442
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303 def lookup_name(cls, data, name): |
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304 __traceback_hide__ = True |
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305 val = data.get(name, UNDEFINED) |
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306 if val is UNDEFINED: |
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307 val = BUILTINS.get(name, val) |
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308 if val is UNDEFINED: |
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309 val = cls.undefined(name) |
442
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310 return val |
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311 |
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312 @classmethod |
691 | 313 def lookup_attr(cls, obj, key): |
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314 __traceback_hide__ = True |
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315 try: |
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316 val = getattr(obj, key) |
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317 except AttributeError: |
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318 if hasattr(obj.__class__, key): |
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319 raise |
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320 else: |
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321 try: |
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322 val = obj[key] |
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323 except (KeyError, TypeError): |
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324 val = cls.undefined(key, owner=obj) |
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325 return val |
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326 |
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327 @classmethod |
691 | 328 def lookup_item(cls, obj, key): |
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329 __traceback_hide__ = True |
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330 if len(key) == 1: |
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331 key = key[0] |
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332 try: |
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333 return obj[key] |
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334 except (AttributeError, KeyError, IndexError, TypeError), e: |
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335 if isinstance(key, basestring): |
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336 val = getattr(obj, key, UNDEFINED) |
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337 if val is UNDEFINED: |
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338 val = cls.undefined(key, owner=obj) |
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339 return val |
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340 raise |
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341 |
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342 @classmethod |
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343 def undefined(cls, key, owner=UNDEFINED): |
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344 """Can be overridden by subclasses to specify behavior when undefined |
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345 variables are accessed. |
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346 |
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347 :param key: the name of the variable |
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348 :param owner: the owning object, if the variable is accessed as a member |
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349 """ |
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350 raise NotImplementedError |
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351 |
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352 |
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353 class LenientLookup(LookupBase): |
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354 """Default variable lookup mechanism for expressions. |
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355 |
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356 When an undefined variable is referenced using this lookup style, the |
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357 reference evaluates to an instance of the `Undefined` class: |
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358 |
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359 >>> expr = Expression('nothing', lookup='lenient') |
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360 >>> undef = expr.evaluate({}) |
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361 >>> undef |
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362 <Undefined 'nothing'> |
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363 |
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364 The same will happen when a non-existing attribute or item is accessed on |
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365 an existing object: |
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366 |
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367 >>> expr = Expression('something.nil', lookup='lenient') |
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368 >>> expr.evaluate({'something': dict()}) |
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369 <Undefined 'nil'> |
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370 |
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371 See the documentation of the `Undefined` class for details on the behavior |
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372 of such objects. |
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373 |
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374 :see: `StrictLookup` |
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375 """ |
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376 |
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377 @classmethod |
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378 def undefined(cls, key, owner=UNDEFINED): |
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379 """Return an ``Undefined`` object.""" |
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380 __traceback_hide__ = True |
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381 return Undefined(key, owner=owner) |
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382 |
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383 |
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384 class StrictLookup(LookupBase): |
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385 """Strict variable lookup mechanism for expressions. |
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386 |
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387 Referencing an undefined variable using this lookup style will immediately |
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388 raise an ``UndefinedError``: |
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389 |
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390 >>> expr = Expression('nothing', lookup='strict') |
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391 >>> expr.evaluate({}) |
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392 Traceback (most recent call last): |
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393 ... |
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394 UndefinedError: "nothing" not defined |
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395 |
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396 The same happens when a non-existing attribute or item is accessed on an |
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397 existing object: |
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398 |
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399 >>> expr = Expression('something.nil', lookup='strict') |
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400 >>> expr.evaluate({'something': dict()}) |
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401 Traceback (most recent call last): |
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402 ... |
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403 UndefinedError: {} has no member named "nil" |
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404 """ |
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405 |
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406 @classmethod |
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407 def undefined(cls, key, owner=UNDEFINED): |
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408 """Raise an ``UndefinedError`` immediately.""" |
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409 __traceback_hide__ = True |
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410 raise UndefinedError(key, owner=owner) |
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411 |
336
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412 |
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413 def _parse(source, mode='eval'): |
601
59fbd7586454
Simplify implementation of `py:with` directive by compiling to a `Suite`, instead of manually breaking up the statement and compiling each part to an `Expression`. Also, the first line of code in a `Suite` is now stored as the "function name" of the bytecode, so that it shows up in tracebacks.
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414 source = source.strip() |
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Simplify implementation of `py:with` directive by compiling to a `Suite`, instead of manually breaking up the statement and compiling each part to an `Expression`. Also, the first line of code in a `Suite` is now stored as the "function name" of the bytecode, so that it shows up in tracebacks.
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415 if mode == 'exec': |
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416 lines = [line.expandtabs() for line in source.splitlines()] |
716
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fix ticket [209] - make sure py:with is valid, and add a test to make sure empty py:for is invalid
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417 if lines: |
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418 first = lines[0] |
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419 rest = dedent('\n'.join(lines[1:])).rstrip() |
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420 if first.rstrip().endswith(':') and not rest[0].isspace(): |
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421 rest = '\n'.join([' %s' % line for line in rest.splitlines()]) |
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422 source = '\n'.join([first, rest]) |
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423 if isinstance(source, unicode): |
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424 source = '\xef\xbb\xbf' + source.encode('utf-8') |
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425 return parse(source, mode) |
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426 |
794
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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427 |
604
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Fix bug that slipped into [717]: the code of a `py:with` directive was not being compiled with AST transformations applied.
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428 def _compile(node, source=None, mode='eval', filename=None, lineno=-1, |
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Fix bug that slipped into [717]: the code of a `py:with` directive was not being compiled with AST transformations applied.
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429 xform=None): |
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430 if isinstance(filename, unicode): |
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431 # unicode file names not allowed for code objects |
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432 filename = filename.encode('utf-8', 'replace') |
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433 elif not filename: |
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434 filename = '<string>' |
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435 if lineno <= 0: |
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436 lineno = 1 |
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437 |
794
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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438 if xform is None: |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
439 xform = { |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
440 'eval': ExpressionASTTransformer |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
441 }.get(mode, TemplateASTTransformer) |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
442 tree = xform().visit(node) |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
443 |
405
5340931530e2
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
444 if mode == 'eval': |
601
59fbd7586454
Simplify implementation of `py:with` directive by compiling to a `Suite`, instead of manually breaking up the statement and compiling each part to an `Expression`. Also, the first line of code in a `Suite` is now stored as the "function name" of the bytecode, so that it shows up in tracebacks.
cmlenz
parents:
586
diff
changeset
|
445 name = '<Expression %r>' % (source or '?') |
405
5340931530e2
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
446 else: |
601
59fbd7586454
Simplify implementation of `py:with` directive by compiling to a `Suite`, instead of manually breaking up the statement and compiling each part to an `Expression`. Also, the first line of code in a `Suite` is now stored as the "function name" of the bytecode, so that it shows up in tracebacks.
cmlenz
parents:
586
diff
changeset
|
447 lines = source.splitlines() |
716
eee7483041dd
fix ticket [209] - make sure py:with is valid, and add a test to make sure empty py:for is invalid
aflett
parents:
715
diff
changeset
|
448 if not lines: |
eee7483041dd
fix ticket [209] - make sure py:with is valid, and add a test to make sure empty py:for is invalid
aflett
parents:
715
diff
changeset
|
449 extract = '' |
eee7483041dd
fix ticket [209] - make sure py:with is valid, and add a test to make sure empty py:for is invalid
aflett
parents:
715
diff
changeset
|
450 else: |
eee7483041dd
fix ticket [209] - make sure py:with is valid, and add a test to make sure empty py:for is invalid
aflett
parents:
715
diff
changeset
|
451 extract = lines[0] |
601
59fbd7586454
Simplify implementation of `py:with` directive by compiling to a `Suite`, instead of manually breaking up the statement and compiling each part to an `Expression`. Also, the first line of code in a `Suite` is now stored as the "function name" of the bytecode, so that it shows up in tracebacks.
cmlenz
parents:
586
diff
changeset
|
452 if len(lines) > 1: |
59fbd7586454
Simplify implementation of `py:with` directive by compiling to a `Suite`, instead of manually breaking up the statement and compiling each part to an `Expression`. Also, the first line of code in a `Suite` is now stored as the "function name" of the bytecode, so that it shows up in tracebacks.
cmlenz
parents:
586
diff
changeset
|
453 extract += ' ...' |
59fbd7586454
Simplify implementation of `py:with` directive by compiling to a `Suite`, instead of manually breaking up the statement and compiling each part to an `Expression`. Also, the first line of code in a `Suite` is now stored as the "function name" of the bytecode, so that it shows up in tracebacks.
cmlenz
parents:
586
diff
changeset
|
454 name = '<Suite %r>' % (extract) |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
455 new_source = ASTCodeGenerator(tree).code |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
456 code = compile(new_source, filename, mode) |
336
7763f7aec949
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
457 |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
458 try: |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
459 # We'd like to just set co_firstlineno, but it's readonly. So we need |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
460 # to clone the code object while adjusting the line number |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
461 return CodeType(0, code.co_nlocals, code.co_stacksize, |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
462 code.co_flags | 0x0040, code.co_code, code.co_consts, |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
463 code.co_names, code.co_varnames, filename, name, |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
464 lineno, code.co_lnotab, (), ()) |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
465 except RuntimeError: |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
466 return code |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
467 |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
468 |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
469 def _new(class_, *args, **kwargs): |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
470 ret = class_() |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
471 for attr, value in zip(ret._fields, args): |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
472 if attr in kwargs: |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
473 raise ValueError('Field set both in args and kwargs') |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
474 setattr(ret, attr, value) |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
475 for attr, value in kwargs: |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
476 setattr(ret, attr, value) |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
477 return ret |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
478 |
336
7763f7aec949
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
479 |
7763f7aec949
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
480 BUILTINS = __builtin__.__dict__.copy() |
442
97544725bb7f
Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option.
cmlenz
parents:
438
diff
changeset
|
481 BUILTINS.update({'Markup': Markup, 'Undefined': Undefined}) |
563
9d1c5c290254
Built-in Python constants (such as `None`) in expressions are used directly instead of being looked up from the context.
cmlenz
parents:
473
diff
changeset
|
482 CONSTANTS = frozenset(['False', 'True', 'None', 'NotImplemented', 'Ellipsis']) |
336
7763f7aec949
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
483 |
564
aeb89e9730df
Alias `__contains__` to `has_key` in `Context` class for code outside of Genshi that may expect that for some wild reason.
cmlenz
parents:
563
diff
changeset
|
484 |
405
5340931530e2
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
485 class TemplateASTTransformer(ASTTransformer): |
336
7763f7aec949
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
486 """Concrete AST transformer that implements the AST transformations needed |
405
5340931530e2
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
487 for code embedded in templates. |
336
7763f7aec949
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
488 """ |
7763f7aec949
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
489 |
357
62de137b9322
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
490 def __init__(self): |
586
3670ea49c65a
Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.
cmlenz
parents:
582
diff
changeset
|
491 self.locals = [CONSTANTS] |
357
62de137b9322
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
492 |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
493 def _extract_names(self, node): |
806
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
494 names = set() |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
495 def _process(node): |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
496 if isinstance(node, _ast.Name): |
806
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
497 names.add(node.id) |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
498 elif isinstance(node, _ast.alias): |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
499 names.add(node.asname or node.name) |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
500 elif isinstance(node, _ast.Tuple): |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
501 for elt in node.elts: |
896
8ae2c1765068
Fix for infinite recursion when parsing argument names from tuples. Closes #383.
cmlenz
parents:
878
diff
changeset
|
502 _process(elt) |
806
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
503 if hasattr(node, 'args'): |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
504 for arg in node.args: |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
505 _process(arg) |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
506 if hasattr(node, 'vararg'): |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
507 names.add(node.vararg) |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
508 if hasattr(node, 'kwarg'): |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
509 names.add(node.kwarg) |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
510 elif hasattr(node, 'names'): |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
511 for elt in node.names: |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
512 _process(elt) |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
513 return names |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
514 |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
515 def visit_Str(self, node): |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
516 if isinstance(node.s, str): |
357
62de137b9322
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
517 try: # If the string is ASCII, return a `str` object |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
518 node.s.decode('ascii') |
357
62de137b9322
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
519 except ValueError: # Otherwise return a `unicode` object |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
520 return _new(_ast.Str, node.s.decode('utf-8')) |
405
5340931530e2
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
521 return node |
5340931530e2
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
522 |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
523 def visit_ClassDef(self, node): |
586
3670ea49c65a
Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.
cmlenz
parents:
582
diff
changeset
|
524 if len(self.locals) > 1: |
3670ea49c65a
Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.
cmlenz
parents:
582
diff
changeset
|
525 self.locals[-1].add(node.name) |
405
5340931530e2
Support for Python code blocks using the `<?python ?>` processing instruction. Closes #84.
cmlenz
parents:
401
diff
changeset
|
526 self.locals.append(set()) |
565
53b37e4f2921
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
527 try: |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
528 return ASTTransformer.visit_ClassDef(self, node) |
565
53b37e4f2921
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
529 finally: |
53b37e4f2921
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
530 self.locals.pop() |
336
7763f7aec949
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
cmlenz
parents:
diff
changeset
|
531 |
806
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
532 def visit_Import(self, node): |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
533 if len(self.locals) > 1: |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
534 self.locals[-1].update(self._extract_names(node)) |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
535 return ASTTransformer.visit_Import(self, node) |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
536 |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
537 def visit_ImportFrom(self, node): |
806
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
538 if [a.name for a in node.names] == ['*']: |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
539 if has_star_import_bug: |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
540 # This is a Python 2.4 bug. Only if we have a broken Python |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
541 # version do we need to apply this hack |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
542 node = _new(_ast.Expr, _new(_ast.Call, |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
543 _new(_ast.Name, '_star_import_patch'), [ |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
544 _new(_ast.Name, '__data__'), |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
545 _new(_ast.Str, node.module) |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
546 ], (), ())) |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
547 return node |
806
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
548 if len(self.locals) > 1: |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
549 self.locals[-1].update(self._extract_names(node)) |
c66c83861266
Fix for import statements in function defs in template code blocks (#276).
cmlenz
parents:
803
diff
changeset
|
550 return ASTTransformer.visit_ImportFrom(self, node) |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
551 |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
552 def visit_FunctionDef(self, node): |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
553 if len(self.locals) > 1: |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
554 self.locals[-1].add(node.name) |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
555 |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
556 self.locals.append(self._extract_names(node.args)) |
565
53b37e4f2921
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
557 try: |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
558 return ASTTransformer.visit_FunctionDef(self, node) |
565
53b37e4f2921
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
559 finally: |
53b37e4f2921
* The I18n extractor now handles gettext function calls that use non-string parameters as well as keyword arguments.
cmlenz
parents:
564
diff
changeset
|
560 self.locals.pop() |
357
62de137b9322
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
cmlenz
parents:
343
diff
changeset
|
561 |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
562 # GeneratorExp(expr elt, comprehension* generators) |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
563 def visit_GeneratorExp(self, node): |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
564 gens = [] |
845
4ec4377f49ee
Fix nested list comprehensions & generator expressions (fixes #327)
mgood
parents:
822
diff
changeset
|
565 for generator in node.generators: |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
566 # comprehension = (expr target, expr iter, expr* ifs) |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
567 self.locals.append(set()) |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
568 gen = _new(_ast.comprehension, self.visit(generator.target), |
845
4ec4377f49ee
Fix nested list comprehensions & generator expressions (fixes #327)
mgood
parents:
822
diff
changeset
|
569 self.visit(generator.iter), |
4ec4377f49ee
Fix nested list comprehensions & generator expressions (fixes #327)
mgood
parents:
822
diff
changeset
|
570 [self.visit(if_) for if_ in generator.ifs]) |
794
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
571 gens.append(gen) |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
572 |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
573 # use node.__class__ to make it reusable as ListComp |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
574 ret = _new(node.__class__, self.visit(node.elt), gens) |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
575 #delete inserted locals |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
576 del self.locals[-len(node.generators):] |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
577 return ret |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
578 |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
579 # ListComp(expr elt, comprehension* generators) |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
cmlenz
parents:
793
diff
changeset
|
580 visit_ListComp = visit_GeneratorExp |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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581 |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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582 def visit_Lambda(self, node): |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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583 self.locals.append(self._extract_names(node.args)) |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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584 try: |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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585 return ASTTransformer.visit_Lambda(self, node) |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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586 finally: |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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587 self.locals.pop() |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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588 |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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589 def visit_Name(self, node): |
357
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Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
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590 # If the name refers to a local inside a lambda, list comprehension, or |
62de137b9322
Improve the way locals (in list comprehensions, lambdas and generator expressions) are handled in template expressions.
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591 # generator expression, leave it alone |
794
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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592 if isinstance(node.ctx, _ast.Load) and \ |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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593 node.id not in flatten(self.locals): |
586
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Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.
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594 # Otherwise, translate the name ref into a context lookup |
794
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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595 name = _new(_ast.Name, '_lookup_name', _ast.Load()) |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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596 namearg = _new(_ast.Name, '__data__', _ast.Load()) |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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597 strarg = _new(_ast.Str, node.id) |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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598 node = _new(_ast.Call, name, [namearg, strarg], []) |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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599 elif isinstance(node.ctx, _ast.Store): |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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600 if len(self.locals) > 1: |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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601 self.locals[-1].add(node.id) |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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602 |
586
3670ea49c65a
Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.
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603 return node |
336
7763f7aec949
Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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604 |
473 | 605 |
606 class ExpressionASTTransformer(TemplateASTTransformer): | |
607 """Concrete AST transformer that implements the AST transformations needed | |
608 for code embedded in templates. | |
609 """ | |
610 | |
794
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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611 def visit_Attribute(self, node): |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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612 if not isinstance(node.ctx, _ast.Load): |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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613 return ASTTransformer.visit_Attribute(self, node) |
473 | 614 |
794
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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615 func = _new(_ast.Name, '_lookup_attr', _ast.Load()) |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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616 args = [self.visit(node.value), _new(_ast.Str, node.attr)] |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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617 return _new(_ast.Call, func, args, []) |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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618 |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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619 def visit_Subscript(self, node): |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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620 if not isinstance(node.ctx, _ast.Load) or \ |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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621 not isinstance(node.slice, _ast.Index): |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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622 return ASTTransformer.visit_Subscript(self, node) |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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623 |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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624 func = _new(_ast.Name, '_lookup_item', _ast.Load()) |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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625 args = [ |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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626 self.visit(node.value), |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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627 _new(_ast.Tuple, (self.visit(node.slice.value),), _ast.Load()) |
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Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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628 ] |
f9e23d472a6e
Merged AST branch back into trunk. Most of this code was written by Marcin Kurczych for his Google Summer of Code 2008 project. The merge of this branch means that Genshi now uses the native `_ast` module on Python >= 2.5, and an emulation thereof on Python 2.4. This replaces the usage of the `compiler` package, which was deprecated in Python 2.6 and removed in Python 3.0. Another effect is that Genshi now runs on Google AppEngine (although performance is bad due to the lack of template caching).
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629 return _new(_ast.Call, func, args, []) |