3 Python Modules

1. What is a Module?

A module is a file that contains Python code.

In simple words:
👉 A module is a Python file (.py)
👉 It has functions, variables, or classes
👉 We use it to reuse code

2. Why Use Modules?

Modules help us to:

• Organize code

• Reuse code

• Keep program clean

• Avoid writing same code again

3. Using a Built-in Module

Python has many built-in modules.

Example: math Module

4. Import Only What You Need

Example

5. Import with Alias

Example

6. Create Your Own Module

Step 1: Create a File mymodule.py

Step 2: Use the Module

7. Import Specific Function from Module

Example

8. The dir() Function

 

Example

9. Built-in Modules Examples

Random Module

Date and Time Module

10. Common Beginner Mistakes

❌ Wrong Module Name

❌ Error.

❌ File Name Conflict

👉 Do not name your file same as module.

11. Simple Practice Examples

Example 1: Use math module

Example 2: Create and Use Module

Example 3: Alias Import

12. Summary (Python Modules)

✔ Module is a Python file
✔ Used to reuse code
✔ Built-in & user-defined modules
✔ Import full or part of module
✔ Makes program organized

📘 Perfect for Beginner eBook

This chapter is ideal for:

• Python beginner books

• School & college students

• Self-learners

If you want next, I can write:

• Packages

• Virtual Environment

• Exception Handling

• File Handling

• Mini Python Projects

Just tell me 😊