[IronPython] normalizing parameters from a method call

Dino Viehland dinov at microsoft.com
Thu Mar 18 18:49:51 CET 2010

The code for this is in MetaPythonFunction in the FunctionBinderHelper class.  In particular GetArgumentsForRule is pretty close to what you're wanting - but this is all working at the meta-level and creating expressions which will be used for the call.  But you can probably use that code as a base.

You could also go back to an older version of Python and look for a KwArgBinder class which may be a little more straight forward.

From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Ronnie Maor
Sent: Thursday, March 18, 2010 10:40 AM
To: Discussion of IronPython
Subject: [IronPython] normalizing parameters from a method call

I'm writing a decorator that needs to identify whether the function it's wrapping contains specific variables and if so, what value was passed to them.

For example if the function is foo(x,y) and it's called with foo(1,2) I want to have this information - {'x' : 1, 'y' : 2}
My problem is that the caller can mix between positional and keyword arguments.

If I write my decorator as accepting *a,**kw I can probably use inspect.getargspec to figure out all the information like I want it.
However, it seems that this is something the language already does, so I wanted to know if I can get some access to the mechanism in python or specifically in IPy, so I don't have to write it again...

Any tips would be greatly appreciated


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