I want Python argparse to throw an exception rather than usage

Question

I don\'t think this is possible, but I want to handle exceptions from argparse myself.

For example:

import argparse
parser = argparse.ArgumentParser(         


        

Answer 1

in my case, argparse prints 'too few arguments' then quit. after reading the argparse code, I found it simply calls sys.exit() after printing some message. as sys.exit() does nothing but throws a SystemExit exception, you can just capture this exception.

so try this to see if it works for you.

    try:
        args = parser.parse_args(args)
    except SystemExit:
        .... your handler here ...
        return