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pythonintrospection

List all function argument names (no docu)

I am a relative beginner in Python and I am trying to use it to run some not-well-documented code. My question is, how can I get a list of possible arguments of a function or a class constructor using interactive shell, for example. Ideally, I would like to have something like dir(), but it should list not class members, but possible argument's names of a function.

If it is not possible, is there any other way to infer function arguments without looking inside the code?

Solution

  • You want inspect.getargspec:

    >>> import inspect
>>> def foo(bar, baz):
...     pass
... 
>>> inspect.getargspec(foo)
ArgSpec(args=['bar', 'baz'], varargs=None, keywords=None, defaults=None)