[issue18181] PEP447: Add type.__getdescriptor__

[Ronald Oussoren]

Ronald Oussoren added the comment:

Note: the error handling code for exceptions in __getdescriptor__ definitely isn't good enough yet. 

I'm writing tests and am hunting down the problems those tests find. I'm getting closer and will post a new version when I think I've found all bugs. Probably some time tomorrow.

For now be warned that unexpected exceptions in __getdescriptor__ might crash the interpreter, especially when it is used to look for dunder methods.

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<http://bugs.python.org/issue18181>
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