python argparse unittest

from unittest import TestCase

from bla_bla_bla import DemoClass

class SampleTestCase(TestCase):
    def test_some_fn(self):
        dc = DemoClass()
        self.assertEqual(2, dc.some_fn(5, 3))
        

if args.someargs is not None: 
    a = int(args.someargs[0][0]) 
    b = int(args.someargs[0][1])

#!/usr/bin/python
# -*- coding: UTF-8 -*-
import argparse


class DemoClass():
    def __init__(self, debug):
        self.debug = debug
        if debug:
            print("init...")

    def some_fn(self, *args):
        if args:
            a = int(args[0][0])
            b = int(args[0][1])

            if self.debug:
                print(a, b)

            return a - b


def create_parser():
    parser = argparse.ArgumentParser()
    parser.add_argument("--verbose", "-v", action="store_true",
                        help="set loglevel verbose")
    parser.add_argument("--someargs", "-s", nargs="*", action="append", help="Return A - B")

    args = parser.parse_args()

    if args.verbose:
        print("Debug...")

        dc = DemoClass(debug=True)
        print("OK, ...", dc.some_fn(*args.someargs))


if __name__ == "__main__":
    create_parser()

if args.someargs is not None: 
    a = int(args.someargs[0][0]) 
    b = int(args.someargs[0][1])