How to reference other python files and functions

Steps required to refer one python file in other python file

1. Create two python files mymodule.py & myprogram.py based on the code given below
2. Then execute python file - myprogram.py

mymodule.py

def my_func() : 
  print("Hey I am in mymodule.py")

myprogram.py

from mymodule import my_func
my_func()

Now to execute the python file myprogram.py

python3 myprogram.py

Output:
Hey I am in mymodule.py