Basic form of Python scripts.

easyscript.py

"""
Usage
=====

::

    $ python easyscript.py 1 2
    3

"""

import sys


def add(a, b):  # Separate actual logic you want to do.
    return a + b


def main():  # Make it just a function for interface.
    a = int(sys.argv[1])  # To handle more complex options, use argparse.
    b = int(sys.argv[2])

    print add(a, b)


if __name__ == "__main__":  # Not to run this program by importing.
    main()