def _getArgNames(spec):
    """
    Get the name of all arguments defined in a function signature.

    The name of * and ** arguments is normalized to "*args" and "**kwargs".

    :param ArgSpec spec: A function to interrogate for a signature.
    :return: The set of all argument names in `func`s signature.
    :rtype: Set[str]
    """
    return set(
        spec.args
        + spec.kwonlyargs
        + (('*args',) if spec.varargs else ())
        + (('**kwargs',) if spec.varkw else ())
        + spec.annotations
    )
def _getArgNames ( spec ) : return set ( spec . args + spec . kwonlyargs + ( ( '*args' , ) if spec . varargs else ( ) ) + ( ( '**kwargs' , ) if spec . varkw else ( ) ) + spec . annotations )
Get the name of all arguments defined in a function signature.

    The name of * and ** arguments is normalized to "*args" and "**kwargs".

    :param ArgSpec spec: A function to interrogate for a signature.
    :return: The set of all argument names in `func`s signature.
    :rtype: Set[str]