Python: Typehints for argparse.Namespace objects

Question

Is there a way to have Python static analyzers (e.g. in PyCharm, other IDEs) pick up on Typehints on argparse.Namespace objects? Example:

parse         


        

Answer 1

Consider defining an extension class to argparse.Namespace that provides the type hints you want:

class MyProgramArgs(argparse.Namespace):
    def __init__():
        self.somearg = 'defaultval' # type: str

Then use namespace= to pass that to parse_args:

def process_argv():
    parser = argparse.ArgumentParser()
    parser.add_argument('--somearg')
    nsp = MyProgramArgs()
    parsed = parser.parse_args(['--somearg','someval'], namespace=nsp)  # type: MyProgramArgs
    the_arg = parsed.somearg  # <- Pycharm should not complain