Packages in Python

A package is a collection of related modules organized inside directories. Packages help manage large Python projects efficiently.

💡 A package is simply a folder that contains Python modules.

Package Structure

A package must contain a special file called __init__.py. 

mypackage/
│
├── __init__.py
├── math_utils.py
└── string_utils.py

Creating a Package

Create a folder and add Python files inside it.

# math_utils.py
def add(a, b):
    return a + b

Using a Package

Import modules from a package like this:

from mypackage import math_utils

print(math_utils.add(5, 7))

Import Specific Functions

from mypackage.math_utils import add

print(add(10, 20))

Built-in Python Packages

Python provides many useful built-in packages such as:

  • os – interacting with the operating system
  • sys – system-specific parameters
  • collections – advanced data structures
  • json – working with JSON data

Practice Exercises

  1. Create a package with two modules
  2. Import a function from one module
  3. Use a built-in package like os
Next → Functions