[Python-Dev] (no subject)
Phillip J. Eby
pje at telecommunity.com
Mon Mar 14 17:13:04 CET 2005
At 04:35 PM 3/14/05 +0100, Thomas Heller wrote:
>Another possibility (ugly, maybe) would be to create sourcecode with the
>function signature that you need, and compile it. inspect.getargspec() and
>inspect.formatargspec can do most of the work.
I've done exactly that, for generic functions in PyProtocols. It's *very*
ugly, and not something I'd wish on anyone needing to write a
decorator. IMO, inspect.getargspec() shouldn't need to be so complicated;
it should just return an object's __signature__ in future Pythons.
Also, the 'object' type should have a __signature__ descriptor that returns
the __signature__ of __call__, if present. And types should have a
__signature__ that returns the __init__ or __new__ signature of the
type. Finally, C methods should have a way to define a __signature__ as well.
At that point, any callable object has an introspectable __signature__,
which would avoid the need for every introspection framework or
documentation tool having to rewrite the same old type dispatching code to
check if it's an instancemethod, an instance with a __call__, a type, etc.
etc. in order to find the real function and how to modify what getargspec()
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