Checking for usual descriptors in Python 2.3
mwh at python.net
Thu Feb 12 12:43:47 CET 2004
Michael Hudson <mwh at python.net> writes:
> François Pinard <pinard at iro.umontreal.ca> writes:
> > This question is a bit technical, but hopefully, this list will offer me
> > good hints or nice solutions. Happily enough for me, it often does! :-)
> > I would need to recognise and play with descriptor types, like:
> > member descriptors
> > method descriptors
> > getset descriptors
> > wrapper descriptors
> > but do not find how to easily refer to them, either from existing
> > constructor types (like we could do with `property', say), nor from
> > members of the `types' module. I also wonder how much I can "get into"
> > these various descriptors or tear them apart...
> If you want to know whether 'ob' is a descriptor,
> hasattr(ob, '__get__')
> is pretty close. PEP 252 is also your friend.
On the off chance that this wasn't what you were asking (:-) and you
wanted to get your hands on the type objects of each of the given
descriptor types, the only way I can think of doing that is getting
your hands on one and calling type() on it.
As to how introspectable each of these are, the interactive
interpreter (or the source) is now your friend.
If you don't use emacs, you're a pathetic, mewling, masochistic
weakling and I can't be bothered to convert you. -- Ron Echeverri
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