#!/usr/bin/env python
import sys


# other imports  (standard library, standard non-library, local)

# constants (AKA global variables)

# main function
def main(args):  # <1>
    function1()
    function2()


# other functions
def function1():
    print("hello from function1()")


def function2():
    print("hello from function2()")


if __name__ == '__main__':
    main(sys.argv[1:])  # <2>