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-rw-r--r--Lib/copy.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/Lib/copy.py b/Lib/copy.py
index a334b79..2646350 100644
--- a/Lib/copy.py
+++ b/Lib/copy.py
@@ -49,6 +49,7 @@ __getstate__() and __setstate__(). See the documentation for module
"""
import types
+import weakref
from copyreg import dispatch_table
class Error(Exception):
@@ -102,7 +103,7 @@ def _copy_immutable(x):
for t in (type(None), int, float, bool, str, tuple,
frozenset, type, range,
types.BuiltinFunctionType, type(Ellipsis),
- types.FunctionType):
+ types.FunctionType, weakref.ref):
d[t] = _copy_immutable
t = getattr(types, "CodeType", None)
if t is not None:
@@ -198,6 +199,7 @@ d[type] = _deepcopy_atomic
d[range] = _deepcopy_atomic
d[types.BuiltinFunctionType] = _deepcopy_atomic
d[types.FunctionType] = _deepcopy_atomic
+d[weakref.ref] = _deepcopy_atomic
def _deepcopy_list(x, memo):
y = []