What are Modules and Packages?

Modules and Packages means modules are Python files that contain reusable code. Packages are folders that organize multiple modules.

In real programs, this topic helps in using built-in modules. Learn the idea first, then type the program yourself and compare the output.

Why should you learn this?

• It is useful for using built-in modules.
• It connects with splitting code into files.
• It improves your ability to read, write and debug Python programs.

Important Terms

These terms are used directly in this lesson. Understand them before memorising the code.

Syntax / Basic Pattern

The simple pattern is: prepare data, apply the concept, then show the result.

import math
from datetime import date
print("Square root:", math.sqrt(64))
print("Today:", date.today())

Complete Example Program

import math
from datetime import date

print("Square root:", math.sqrt(64))
print("Today:", date.today())

Expected Output

Program Explanation

• import math imports ready-made features from a module/library.
• from datetime import date imports ready-made features from a module/library.
• print("Square root:", math.sqrt(64)) displays information or calculated result on the screen.
• print("Today:", date.today()) displays information or calculated result on the screen.

Where will you use it?

• Using built-in modules.
• Splitting code into files.
• Reusing code from libraries.

Common Mistakes

• Writing code with wrong indentation.
• Using input() value directly in calculations without converting it to int or float.
• Using unclear variable names that make the program difficult to understand.

Practice Tasks

1. Type the program in modules-packages.py and run it.
2. Change input values or sample data and observe the new output.
3. Create one example related to using built-in modules.
4. Write 5 lines explaining the logic in your own words.

Summary

Modules and Packages is not a theory-only topic. You should be able to explain the meaning, write the example, run it successfully, and use it in a small practical program.