Notice that both classes are identical, except that one inherits from dict (and works) and the other inherits from OrderedDict and fails. Has anyone seen this before? Thanks.
import collections class Y(dict): def __init__(self, stuff): for k, v in stuff: self[k] = v # This works: print Y([('a', 'b'), ('c', 'd')]) class X(collections.OrderedDict): def __init__(self, stuff): for k, v in stuff: self[k] = v # This doesn't: print X([('a', 'b'), ('c', 'd')]) """ Output: {'a': 'b', 'c': 'd'} Traceback (most recent call last): File "OrderedDictInheritance.py", line 17, in <module> print X([('a', 'b'), ('c', 'd')]) File "OrderedDictInheritance.py", line 14, in __init__ self[k] = v File "C:\Python27\lib\collections.py", line 58, in __setitem__ root = self.__root AttributeError: 'X' object has no attribute '_OrderedDict__root' """ -- http://mail.python.org/mailman/listinfo/python-list