[issue8699] Equality and hashing for functools.partial

[Daniel Urban]

Daniel Urban <urban.dani+py at gmail.com> added the comment:

On python-dev Yaniv Aknin pointed out that the keywords dictionary of a partial object is mutable [1].  This causes problems with hashing and equality.  The new patch replaces the keywords dictionary with a read-only proxy of that dictionary.  This seems to solve the problem. 

[1] http://mail.python.org/pipermail/python-dev/2010-May/100059.html

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Added file: http://bugs.python.org/file17318/partial_eq_hash_3.diff

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