[issue6137] Pickle migration: Should pickle map "copy_reg" to "copyreg"?

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

Unpickling e.g. StringIO objects doesn't seem to work:

>>> s = pickle.load(open("stringio.pickle", "rb"))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/antoine/py3k/picklecompat-6137/Lib/pickle.py", line 1351,
in load
    encoding=encoding, errors=errors).load()
AttributeError: '_io.BytesIO' object has no attribute '__dict__'
>>>

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<http://bugs.python.org/issue6137>
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