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Prevent using mutable objects as default params. #23

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Merged
Parent: Python3 update – split up test_transformer.py
merged 2 commits into from
Feb 1, 2017
Merged

Prevent using mutable objects as default params. #23

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Prevent using mutable objects as default params.
Feb 1, 2017
d65b787
Merge branch 'Python3_update' into fix-init-args
loechel Feb 1, 2017
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8 changes: 4 additions & 4 deletions src/RestrictedPython/transformer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -86,11 +86,11 @@ def new_print_scope(self):

class RestrictingNodeTransformer(ast.NodeTransformer):

def __init__(self, errors=[], warnings=[], used_names=[]):
def __init__(self, errors=None, warnings=None, used_names=None):
super(RestrictingNodeTransformer, self).__init__()
self.errors = errors
self.warnings = warnings
self.used_names = used_names
self.errors = [] if errors is None else errors
self.warnings = [] if warnings is None else warnings
self.used_names = [] if used_names is None else used_names

# Global counter to construct temporary variable names.
self._tmp_idx = 0
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