Automatically parse args and call a function based on it's signature.

argparse_call.py

import inspect
from argparse import ArgumentParser


def argparse_call(fn):
    sig = inspect.signature(fn)
    p = ArgumentParser()
    for param in sig.parameters.values():
        kwargs = {
            'type': param.annotation,
            'default': param.default,
            'required': param.default == inspect.Parameter.empty,
        }
        if kwargs['type'] == bool and param.default is False:
            kwargs['action'] = 'store_true'
            del kwargs['type']
        p.add_argument(f'--{param.name}', **kwargs)
    args = p.parse_args()
    return fn(**vars(args))