Antoine Pitrou <pit...@free.fr> added the comment:

I just tried the patch. One problem is that you are supposed to be able to call 
close() several times without having it fail:

>>> f = open("LICENSE")
>>> f.close()
>>> f.close()
>>> f = io.open("LICENSE")
>>> f.close()
>>> f.close()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: I/O operation on closed file.

This means your patch should be a little smarter.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue7865>
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