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create NameConstant AST class for None, True, and False literals (closes #16619)

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This commit is contained in:
Benjamin Peterson 2012-12-06 17:41:04 -05:00
parent 4b237e3b11
commit 442f20996d
15 changed files with 152 additions and 72 deletions
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6
Lib/ast.py
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@ -42,7 +42,6 @@ def literal_eval(node_or_string):
Python literal structures: strings, bytes, numbers, tuples, lists, dicts,
sets, booleans, and None.
"""
_safe_names = {'None': None, 'True': True, 'False': False}
if isinstance(node_or_string, str):
node_or_string = parse(node_or_string, mode='eval')
if isinstance(node_or_string, Expression):
@ -61,9 +60,8 @@ def literal_eval(node_or_string):
elif isinstance(node, Dict):
return dict((_convert(k), _convert(v)) for k, v
in zip(node.keys, node.values))
elif isinstance(node, Name):
if node.id in _safe_names:
return _safe_names[node.id]
elif isinstance(node, NameConstant):
return node.value
elif isinstance(node, UnaryOp) and \
isinstance(node.op, (UAdd, USub)) and \
isinstance(node.operand, (Num, UnaryOp, BinOp)):