Error when handling **kwargs parameters

[adrienhenry]

Describe the bug
I get the following error when I document **kwargs parameter in my docstring with the two **.

line 216, in read_parameters_section
    signature_param = self.signature.parameters[name]
KeyError: '**kwargs'

To Reproduce

def function(a, **kwargs):
    """
    Args:
        a: a parameter.
        **kwargs: kwarg parameters
    """
    return None

Information (please complete the following information):

• OS: Debian
• mkdocstrings version: [0.7.0]

Additional context
This seems to come from the inspect module as inspect.signature(function).parameters would return:

mappingproxy({'a': <Parameter "a">, 'kwargs': <Parameter "**kwargs">})

and the **kwargs key is not present but kwargs is.

[pawamoy]

Haha yes, I thought about this one this morning again. Indeed we should simply remove the * or ** from param names before searching them in the signature.

Moving the issue to pytkdocs.

[adrienhenry]

Can I help with something?
The signature_param = self.signature.parameters[name] to signature_param = self.signature.parameters[name.lstrip("*")] fix the bug.

[pawamoy]

Of course, you can open a PR with this fix if you want! Maybe also add *args and **kwargs somewhere in the docstrings tests 🙂

[pawamoy]

Fixed in #21