ทำงานใน work_dir/my_package/utils.py

def we_need_to_talk(break_up=False):
    """Helper for communicating with significant other"""
    if break_up:
        print("It's not you, it's me...")
    else:
        print('I <3 U!')

ทำงานใน work_dir/my_script.py

# Import utils submodule
import my_package.utils

# Decide to start seeing other people
my_package.utils.we_need_to_talk(break_up=True)

It's not you, it's me...