New submission from Serhiy Storchaka:
StringIO.StringIO is pickleable and unpickleable on 2.7 but is not unpickleable
on 3.x.
Python 2.7:
>>> import pickle, StringIO
>>> pickle.dumps(StringIO.StringIO('abc'), 2)
'\x80\x02(cStringIO\nStringIO\nq\x00oq\x01}q\x02(U\tsoftspaceq\x03K\x00U\x07buflistq\x04]q\x05U\x03posq\x06K\x00U\x03lenq\x07K\x03U\x06closedq\x08\x89U\x03bufq\tU\x03abcq\nub.'
>>> pickle.loads(b'\x80\x02(cStringIO\nStringIO\nq\x00oq\x01}q\x02(U\tsoftspaceq\x03K\x00U\x07buflistq\x04]q\x05U\x03posq\x06K\x00U\x03lenq\x07K\x03U\x06closedq\x08\x89U\x03bufq\tU\x03abcq\nub.')
<StringIO.StringIO instance at 0xb70c122c>
On 3.x I got an error:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: _io.StringIO.__setstate__ argument should be 4-tuple, got dict
----------
components: Library (Lib)
messages: 231268
nosy: alexandre.vassalotti, pitrou, serhiy.storchaka
priority: normal
severity: normal
status: open
title: StringIO.StringIO pickled in 2.7 is not unpickleable on 3.x
type: behavior
versions: Python 3.4, Python 3.5
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue22890>
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