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Issue #2116: Weak references and weak dictionaries now support copy()ing and deepcopy()ing.

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This commit is contained in:
Antoine Pitrou 2009-05-15 16:54:52 +00:00
parent 52035a04ab
commit 775fd66d7b
4 changed files with 116 additions and 1 deletions
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4
Lib/copy.py
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@ -49,6 +49,7 @@ __getstate__() and __setstate__(). See the documentation for module
"""
import types
import weakref
from copy_reg import dispatch_table
class Error(Exception):
@ -102,7 +103,7 @@ def _copy_immutable(x):
for t in (type(None), int, long, float, bool, str, tuple,
frozenset, type, xrange, types.ClassType,
types.BuiltinFunctionType, type(Ellipsis),
types.FunctionType):
types.FunctionType, weakref.ref):
d[t] = _copy_immutable
for name in ("ComplexType", "UnicodeType", "CodeType"):
t = getattr(types, name, None)
@ -220,6 +221,7 @@ d[xrange] = _deepcopy_atomic
d[types.ClassType] = _deepcopy_atomic
d[types.BuiltinFunctionType] = _deepcopy_atomic
d[types.FunctionType] = _deepcopy_atomic
d[weakref.ref] = _deepcopy_atomic
def _deepcopy_list(x, memo):
y = []