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Groups > comp.lang.python > #12394

Re: Checking Signature of Function Parameter

From Nobody <nobody@nowhere.com>
Subject Re: Checking Signature of Function Parameter
Date 2011-08-29 07:30 +0100
Message-Id <pan.2011.08.29.06.30.36.541000@nowhere.com>
Newsgroups comp.lang.python
References <5176c3dc-9270-46fe-a4d3-9dc2e9e97da5@q2g2000vbz.googlegroups.com>
Organization Zen Internet

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On Sun, 28 Aug 2011 14:20:11 -0700, Travis Parks wrote:

> More importantly, I want to make sure that
> predicate is callable, accepting a thing, returning a bool.

The "callable" part is do-able, the rest isn't.

The predicate may accept an arbitrary set of arguments via the "*args"
and/or "**kwargs" syntax, and pass these on to some other function.
Exactly *which* function may be the result of an arbitrarily complex
expression. Or it may not even call another function, but just use the
arbitrary set of arguments in an arbitrarily complex manner.

IOW, determining in advance what will or won't work is actually impossible.

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Thread

Checking Signature of Function Parameter Travis Parks <jehugaleahsa@gmail.com> - 2011-08-28 14:20 -0700
  Re: Checking Signature of Function Parameter Chris Angelico <rosuav@gmail.com> - 2011-08-29 07:31 +1000
    Re: Checking Signature of Function Parameter Travis Parks <jehugaleahsa@gmail.com> - 2011-08-28 17:20 -0700
      Re: Checking Signature of Function Parameter Chris Angelico <rosuav@gmail.com> - 2011-08-29 10:27 +1000
  Re: Checking Signature of Function Parameter Ian Kelly <ian.g.kelly@gmail.com> - 2011-08-28 18:40 -0600
  Re: Checking Signature of Function Parameter Chris Rebert <clp2@rebertia.com> - 2011-08-28 18:21 -0700
  Re: Checking Signature of Function Parameter Nobody <nobody@nowhere.com> - 2011-08-29 07:30 +0100
    Re: Checking Signature of Function Parameter Travis Parks <jehugaleahsa@gmail.com> - 2011-08-29 09:45 -0700
      Re: Checking Signature of Function Parameter Ian Kelly <ian.g.kelly@gmail.com> - 2011-08-29 11:42 -0600
        Re: Checking Signature of Function Parameter Travis Parks <jehugaleahsa@gmail.com> - 2011-08-29 11:04 -0700
          Re: Checking Signature of Function Parameter Ethan Furman <ethan@stoneleaf.us> - 2011-08-29 16:36 -0700

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