Knowing the signature of a function
kent37 at tds.net
Wed Jun 8 14:35:39 CEST 2005
Xavier Décoret wrote:
> I have the following code:
> def foo(x,y):
> How can I query the function object foo to know the number of parameters
> it expects. I can find it is a function using callable(f), I can find
> some information (listed by dir(foo)) such as the name of the
> function,etc.. but nowhere I can find the number of arguments.
> I would like to know wether the function expects one or zero arguments.
foo.func_code.co_argcount gives the count of named args. len(foo.func_code.co_varnames) gives the total number of arguments including *args and **kwds args. inspect.getargspec() might also be helpful.
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