Python argparse: Make at least one argument required

Question

I\'ve been using argparse for a Python program that can -process, -upload or both:

parser = argparse.ArgumentParser(de         


        

Answer 1

This achieves the purpose and this will also be relfected in the argparse autogenerated --help output, which is imho what most sane programmers want (also works with optional arguments):

parser.add_argument(
    'commands',
    nargs='+',                      # require at least 1
    choices=['process', 'upload'],  # restrict the choice
    help='commands to execute'
)

Official docs on this: https://docs.python.org/3/library/argparse.html#choices