Issue #2116: Weak references and weak dictionaries now support copy()ing and deepcopy()ing.
diff --git a/Lib/copy.py b/Lib/copy.py
index 3f2033f..d3db93d 100644
--- a/Lib/copy.py
+++ b/Lib/copy.py
@@ -49,6 +49,7 @@
"""
import types
+import weakref
from copy_reg import dispatch_table
class Error(Exception):
@@ -102,7 +103,7 @@
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[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 = []