[issue11664] Add patch method to unittest.TestCase

[Michael Foord]

Michael Foord <michael at voidspace.org.uk> added the comment:

I'd like to ponder this a bit. Note that the patch is incorrect - fetching the attribute should not be done with getattr (this will trigger descriptors instead of fetching the underlying member) and should not be reset unconditionally (if the original was fetched from a base class the just deleting the patched member will restore the original). 

If we decide to do this I can provide a patch.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11664>
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