Script that asks a yes/no question

yesno.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import argparse

def yesno(question):
    prompt = f'{question} (y/n): '
    answer = input(prompt).strip().lower()

    if answer not in ['y', 'n']:
        print(f'{answer} is an invalid choice, please select y/n')
        return yesno(question)

    if answer == 'y':
        return True

    return False


def main():

    parser = argparse.ArgumentParser(description="""Simple script to ask a question expecting a yes or no answer.""")
    parser.add_argument("question", type=str, nargs='?', default="Yes or No?", help="Write your question")
    args = parser.parse_args()
    answer = yesno(args.question)
    print(f'Your answer was: {answer}')

if __name__ == '__main__':
    main()