• Creating a Module:
  • Let’s create a simple module named math_operations.py:
    Python

    # math_operations.py
    def add(a, b):
        return a + b
    
    def subtract(a, b):
        return a - b

• Using a Module:
  • In another Python file, we can import and use the functions from our module:
    Python

    # main.py
    import math_operations
    
    result1 = math_operations.add(5, 3)
    result2 = math_operations.subtract(10, 4)
    
    print(f"Addition result: {result1}")
    print(f"Subtraction result: {result2}")
    

Standard Library Modules

• Python provides a rich set of standard library modules for common tasks.
• Example: Using the math module to get the value of π (pi):
  Python

  import math
  
  print(f"The value of π is approximately {math.pi}")
  

Best Practices

• Keep functions small and focused.
• Use meaningful function names.
• Organize related functions into modules.
• Avoid naming conflicts by using unique module names.

By mastering functions and modules, you’ll write cleaner, more maintainable code. Keep practicing and building!