[Python-Dev] PEP 318 restrictions on elements (original) (raw)

[Python-Dev] PEP 318 - generality of list; restrictions on elements

Greg Ewing greg at cosc.canterbury.ac.nz
Wed Mar 10 19:38:44 EST 2004

Aahz <aahz at pythoncraft.com>:

Maybe I'm misunderstanding something. I thought that a property contains a get descriptor, which makes it a kind of callable.

A property is a descriptor which contains up to 3 callables (for get, set, del), but descriptors themselves are not callable.

This is one reason we can't require the result of a decorator to be callable. That would immediately rule out classmethod and staticmethod, which return descriptors, not callables!

Greg Ewing, Computer Science Dept, +--------------------------------------+ University of Canterbury, | A citizen of NewZealandCorp, a | Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. | greg at cosc.canterbury.ac.nz +--------------------------------------+

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