How can you create a module in python?

Question 1

general summary

Answer 1

You can create a Python module through one of two methods:

• Define: Begin with saving a Python file with .py extension. This file will automatically function as a module.
• Create a Blank Module: Start an empty file with no extension. Name the file using the accepted module syntax, e.g.,\_\_init\_\_, for it to act as a module.

Question 2

Module Definition and usage

Answer 2

Save the below math_operations.py file

def add(x, y):
    return x + y

def subtract(x, y):
    return x - y

def multiply(x, y):
    return x * y

def divide(x, y):
    return x / y

You can use math_operations module by using import as shown below:

from math_operations import add

result = add(3, 2)
print(result)

Question 3

Best Practice

Answer 3

Avoid Global Variables: Use a main() function.

Guard Against Code Execution on Import: To avoid unintended side effects, use:

if \_\_name\_\_ == "\_\_main\_\_":
    main()

This makes sure that the block of code following if __name__ == “__main__”: is only executed when the module is run directly and not when imported as a module in another program.