Mercurial > genshi > genshi-test
comparison markup/eval.py @ 69:e9a3930f8823
A couple of minor performance improvements.
| author | cmlenz |
|---|---|
| date | Mon, 10 Jul 2006 17:37:01 +0000 |
| parents | 822089ae65ce |
| children | cc034182061e |
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| 68:a1f93d095759 | 69:e9a3930f8823 |
|---|---|
| 67 >>> data = dict(items=[1, 2, 3]) | 67 >>> data = dict(items=[1, 2, 3]) |
| 68 >>> Expression('len(items)').evaluate(data) | 68 >>> Expression('len(items)').evaluate(data) |
| 69 3 | 69 3 |
| 70 """ | 70 """ |
| 71 __slots__ = ['source', 'ast'] | 71 __slots__ = ['source', 'ast'] |
| 72 __visitors = {} | 72 _visitors = {} |
| 73 | 73 |
| 74 def __init__(self, source): | 74 def __init__(self, source): |
| 75 """Create the expression. | 75 """Create the expression. |
| 76 | 76 |
| 77 @param source: the expression as string | 77 @param source: the expression as string |
| 95 return self._visit(self.ast.node, data) | 95 return self._visit(self.ast.node, data) |
| 96 | 96 |
| 97 # AST traversal | 97 # AST traversal |
| 98 | 98 |
| 99 def _visit(self, node, data): | 99 def _visit(self, node, data): |
| 100 v = self.__visitors.get(node.__class__) | 100 v = self._visitors.get(node.__class__) |
| 101 if not v: | 101 if not v: |
| 102 v = getattr(self, '_visit_%s' % node.__class__.__name__.lower()) | 102 v = getattr(self, '_visit_%s' % node.__class__.__name__.lower()) |
| 103 self.__visitors[node.__class__] = v | 103 self._visitors[node.__class__] = v |
| 104 return v(node, data) | 104 return v(node, data) |
| 105 | 105 |
| 106 def _visit_expression(self, node, data): | 106 def _visit_expression(self, node, data): |
| 107 for child in node.getChildNodes(): | 107 for child in node.getChildNodes(): |
| 108 return self._visit(child, data) | 108 return self._visit(child, data) |
| 246 return self._visit(self.ast, data) | 246 return self._visit(self.ast, data) |
| 247 | 247 |
| 248 # AST traversal | 248 # AST traversal |
| 249 | 249 |
| 250 def _visit(self, node, data): | 250 def _visit(self, node, data): |
| 251 v = self.__visitors.get(node.__class__) | 251 v = self._visitors.get(node.__class__) |
| 252 if not v: | 252 if not v: |
| 253 v = getattr(self, '_visit_%s' % node.__class__.__name__.lower()) | 253 v = getattr(self, '_visit_%s' % node.__class__.__name__.lower()) |
| 254 self.__visitors[node.__class__] = v | 254 self._visitors[node.__class__] = v |
| 255 return v(node, data) | 255 return v(node, data) |
| 256 | 256 |
| 257 def _visit_expression(self, node, data): | 257 def _visit_expression(self, node, data): |
| 258 return self._visit(node.body, data) | 258 return self._visit(node.body, data) |
| 259 | 259 |