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1 # copyright 2003-2013 LOGILAB S.A. (Paris, FRANCE), all rights reserved. | 1 # copyright 2003-2013 LOGILAB S.A. (Paris, FRANCE), all rights reserved. |
2 # contact http://www.logilab.fr/ -- mailto:contact@logilab.fr | 2 # contact http://www.logilab.fr/ -- mailto:contact@logilab.fr |
3 # | 3 # |
4 # This file is part of astroid. | 4 # This file is part of astroid. |
5 # | 5 # |
6 # astroid is free software: you can redistribute it and/or modify it | 6 # astroid is free software: you can redistribute it and/or modify it |
7 # under the terms of the GNU Lesser General Public License as published by the | 7 # under the terms of the GNU Lesser General Public License as published by the |
8 # Free Software Foundation, either version 2.1 of the License, or (at your | 8 # Free Software Foundation, either version 2.1 of the License, or (at your |
9 # option) any later version. | 9 # option) any later version. |
10 # | 10 # |
11 # astroid is distributed in the hope that it will be useful, but | 11 # astroid is distributed in the hope that it will be useful, but |
12 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | 12 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
13 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License | 13 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License |
14 # for more details. | 14 # for more details. |
15 # | 15 # |
16 # You should have received a copy of the GNU Lesser General Public License along | 16 # You should have received a copy of the GNU Lesser General Public License along |
17 # with astroid. If not, see <http://www.gnu.org/licenses/>. | 17 # with astroid. If not, see <http://www.gnu.org/licenses/>. |
18 """this module contains some utilities to navigate in the tree or to | 18 """this module contains some utilities to navigate in the tree or to |
19 extract information from it | 19 extract information from it |
20 """ | 20 """ |
| 21 from __future__ import print_function |
21 | 22 |
22 __docformat__ = "restructuredtext en" | 23 __docformat__ = "restructuredtext en" |
23 | 24 |
24 from astroid.exceptions import AstroidBuildingException | 25 from astroid.exceptions import AstroidBuildingException |
25 from astroid.builder import parse | 26 from astroid.builder import parse |
26 | 27 |
27 | 28 |
28 class ASTWalker(object): | 29 class ASTWalker(object): |
29 """a walker visiting a tree in preorder, calling on the handler: | 30 """a walker visiting a tree in preorder, calling on the handler: |
30 | 31 |
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102 self.visit(local_node) | 103 self.visit(local_node) |
103 if methods[1] is not None: | 104 if methods[1] is not None: |
104 return methods[1](node) | 105 return methods[1](node) |
105 | 106 |
106 | 107 |
107 def _check_children(node): | 108 def _check_children(node): |
108 """a helper function to check children - parent relations""" | 109 """a helper function to check children - parent relations""" |
109 for child in node.get_children(): | 110 for child in node.get_children(): |
110 ok = False | 111 ok = False |
111 if child is None: | 112 if child is None: |
112 print "Hm, child of %s is None" % node | 113 print("Hm, child of %s is None" % node) |
113 continue | 114 continue |
114 if not hasattr(child, 'parent'): | 115 if not hasattr(child, 'parent'): |
115 print " ERROR: %s has child %s %x with no parent" % ( | 116 print(" ERROR: %s has child %s %x with no parent" % ( |
116 node, child, id(child)) | 117 node, child, id(child))) |
117 elif not child.parent: | 118 elif not child.parent: |
118 print " ERROR: %s has child %s %x with parent %r" % ( | 119 print(" ERROR: %s has child %s %x with parent %r" % ( |
119 node, child, id(child), child.parent) | 120 node, child, id(child), child.parent)) |
120 elif child.parent is not node: | 121 elif child.parent is not node: |
121 print " ERROR: %s %x has child %s %x with wrong parent %s" % ( | 122 print(" ERROR: %s %x has child %s %x with wrong parent %s" % ( |
122 node, id(node), child, id(child), child.parent) | 123 node, id(node), child, id(child), child.parent)) |
123 else: | 124 else: |
124 ok = True | 125 ok = True |
125 if not ok: | 126 if not ok: |
126 print "lines;", node.lineno, child.lineno | 127 print("lines;", node.lineno, child.lineno) |
127 print "of module", node.root(), node.root().name | 128 print("of module", node.root(), node.root().name) |
128 raise AstroidBuildingException | 129 raise AstroidBuildingException |
129 _check_children(child) | 130 _check_children(child) |
130 | 131 |
131 | 132 |
132 class TreeTester(object): | 133 class TreeTester(object): |
133 '''A helper class to see _ast tree and compare with astroid tree | 134 '''A helper class to see _ast tree and compare with astroid tree |
134 | 135 |
135 indent: string for tree indent representation | 136 indent: string for tree indent representation |
136 lineno: bool to tell if we should print the line numbers | 137 lineno: bool to tell if we should print the line numbers |
137 | 138 |
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229 return tree | 230 return tree |
230 | 231 |
231 def astroid_tree_repr(self, ids=False): | 232 def astroid_tree_repr(self, ids=False): |
232 """build the astroid tree and return a nice tree representation""" | 233 """build the astroid tree and return a nice tree representation""" |
233 mod = self.build_astroid_tree() | 234 mod = self.build_astroid_tree() |
234 return mod.repr_tree(ids) | 235 return mod.repr_tree(ids) |
235 | 236 |
236 | 237 |
237 __all__ = ('LocalsVisitor', 'ASTWalker',) | 238 __all__ = ('LocalsVisitor', 'ASTWalker',) |
238 | 239 |
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