Author Mark.Shannon
Recipients Mark.Shannon
Date 2012-04-30.10:11:20
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Message-id <1335780682.19.0.434044540817.issue14699@psf.upfronthosting.co.za>
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Content
classmethod_descriptor should either be uncallable or (better) accept the correct number of arguments.
The classmethod_descriptor can be regarded as the Python object corresponding directly to the underlying C function, as well as a descriptor object.
When called it should check that its first parameter is a subtype of the type in which it was declared, and then pass that as the 'self' parameter to the underlying C function. Currently it passes the type in which it was declared as its 'self' parameter, adding the remaining parameters.

This means that this fails:
float.__dict__['fromhex'](float, "1")
and this succeeds:
float.__dict__['fromhex']("1")
but it should be the other way around, otherwise it is impossible to pass a subtype as a parameter.

There is no tests for calling classmethod_descriptors in the test suite.

Attached patch includes tests and fixes the behaviour.
History
Date User Action Args
2012-04-30 10:11:22Mark.Shannonsetrecipients: + Mark.Shannon
2012-04-30 10:11:22Mark.Shannonsetmessageid: <1335780682.19.0.434044540817.issue14699@psf.upfronthosting.co.za>
2012-04-30 10:11:21Mark.Shannonlinkissue14699 messages
2012-04-30 10:11:21Mark.Shannoncreate