[issue29377] Add the 'wrapper_descriptor' type to the types module

[Manuel Krebber]

Manuel Krebber added the comment:

I created the last patch without commiting, so maybe this one will work properly with the revision tool.

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Added file: http://bugs.python.org/file46429/slot-wrapper-types.patch

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<http://bugs.python.org/issue29377>
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