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keep UserDict an old-style class

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Be generous in abc.py to allow this.
This commit is contained in:
Benjamin Peterson 2010-06-22 18:09:02 +00:00
parent 3ceab01cef
commit bde67df0cd
3 changed files with 4 additions and 4 deletions
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4
Lib/abc.py
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@ -3,6 +3,8 @@
"""Abstract Base Classes (ABCs) according to PEP 3119."""
import types
# Instance of old-style class
class _C: pass
@ -101,7 +103,7 @@ class ABCMeta(type):
def register(cls, subclass):
"""Register a virtual subclass of an ABC."""
if not isinstance(subclass, type):
if not isinstance(subclass, (type, types.ClassType)):
raise TypeError("Can only register classes")
if issubclass(subclass, cls):
return # Already a subclass