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annotate genshi/compat.py @ 1022:500573200533 trunk

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Add isstring helper.
author hodgestar
date Sun, 16 Feb 2014 18:43:20 +0000
parents 3f8fb83045b9
children
rev   line source
931
3f8fb83045b9 Merge r1139 from py3k: add compatibility functions for dealing with python 3; factor existing compatibility functions out from genshi utils.
hodgestar
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diff changeset
1 # -*- coding: utf-8 -*-
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2 #
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3 # Copyright (C) 2006-2009 Edgewall Software
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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
3f8fb83045b9 Merge r1139 from py3k: add compatibility functions for dealing with python 3; factor existing compatibility functions out from genshi utils.
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7 # you should have received as part of this distribution. The terms
3f8fb83045b9 Merge r1139 from py3k: add compatibility functions for dealing with python 3; factor existing compatibility functions out from genshi utils.
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8 # are also available at http://genshi.edgewall.org/wiki/License.
3f8fb83045b9 Merge r1139 from py3k: add compatibility functions for dealing with python 3; factor existing compatibility functions out from genshi utils.
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9 #
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10 # This software consists of voluntary contributions made by many
3f8fb83045b9 Merge r1139 from py3k: add compatibility functions for dealing with python 3; factor existing compatibility functions out from genshi utils.
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11 # individuals. For the exact contribution history, see the revision
3f8fb83045b9 Merge r1139 from py3k: add compatibility functions for dealing with python 3; factor existing compatibility functions out from genshi utils.
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12 # history and logs, available at http://genshi.edgewall.org/log/.
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13
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14 """Various Python version compatibility classes and functions."""
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15
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16 import sys
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17 from types import CodeType
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18
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19
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20 IS_PYTHON2 = (sys.version_info[0] == 2)
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21
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22
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23 # This function should only be called in Python 2, and will fail in Python 3
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24
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25 if IS_PYTHON2:
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26 def stringrepr(string):
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27 ascii = string.encode('ascii', 'backslashreplace')
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28 quoted = "'" + ascii.replace("'", "\\'") + "'"
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29 if len(ascii) > len(string):
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30 return 'u' + quoted
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31 return quoted
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32 else:
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33 def stringrepr(string):
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34 raise RuntimeError(
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35 'Python 2 compatibility function. Not usable in Python 3.')
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36
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37
1022
500573200533 Add isstring helper.
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38 # We need to test if an object is an instance of a string type in places
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39
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40 if IS_PYTHON2:
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41 def isstring(obj):
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42 return isinstance(obj, basestring)
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43 else:
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44 def isstring(obj):
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45 return isinstance(obj, str)
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46
931
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47 # We need to differentiate between StringIO and BytesIO in places
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48
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49 if IS_PYTHON2:
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50 from StringIO import StringIO
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51 try:
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52 from cStringIO import StringIO as BytesIO
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53 except ImportError:
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54 BytesIO = StringIO
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55 else:
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56 from io import StringIO, BytesIO
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57
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58
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59 # We want to test bytestring input to some stuff.
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60
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61 if IS_PYTHON2:
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62 def wrapped_bytes(bstr):
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63 assert bstr.startswith('b')
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64 return bstr[1:]
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65 else:
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66 def wrapped_bytes(bstr):
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67 assert bstr.startswith('b')
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68 return bstr
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69
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70
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71 # We do some scary stuff with CodeType() in template/eval.py
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72
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73 if IS_PYTHON2:
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74 def get_code_params(code):
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75 return (code.co_nlocals, code.co_stacksize, code.co_flags,
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76 code.co_code, code.co_consts, code.co_names, code.co_varnames,
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77 code.co_filename, code.co_name, code.co_firstlineno,
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78 code.co_lnotab, (), ())
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79
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80 def build_code_chunk(code, filename, name, lineno):
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81 return CodeType(0, code.co_nlocals, code.co_stacksize,
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82 code.co_flags | 0x0040, code.co_code, code.co_consts,
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83 code.co_names, code.co_varnames, filename, name,
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84 lineno, code.co_lnotab, (), ())
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85 else:
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86 def get_code_params(code):
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87 return (code.co_nlocals, code.co_kwonlyargcount, code.co_stacksize,
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88 code.co_flags, code.co_code, code.co_consts, code.co_names,
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89 code.co_varnames, code.co_filename, code.co_name,
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90 code.co_firstlineno, code.co_lnotab, (), ())
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91
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92 def build_code_chunk(code, filename, name, lineno):
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93 return CodeType(0, code.co_nlocals, code.co_kwonlyargcount,
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94 code.co_stacksize, code.co_flags | 0x0040,
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95 code.co_code, code.co_consts, code.co_names,
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96 code.co_varnames, filename, name, lineno,
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97 code.co_lnotab, (), ())
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98
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99 # Compatibility fallback implementations for Python < 2.6
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100
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101 try:
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102 next = next
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103 except NameError:
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104 def next(iterator):
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105 return iterator.next()
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106
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107 # Compatibility fallback implementations for Python < 2.5
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108
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109 try:
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110 all = all
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111 any = any
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112 except NameError:
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113 def any(S):
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114 for x in S:
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115 if x:
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116 return True
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117 return False
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118
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119 def all(S):
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120 for x in S:
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121 if not x:
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122 return False
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123 return True
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