Python Mastery – From Basics to Brilliance / Modules & Packages

Python Standard Library

📚 Python Standard Library

The Python Standard Library is a collection of pre-written modules and functions that come with Python.

You can use them without installing any external package.

📦 Common Standard Library Modules

Module

Purpose

Example

math 🧮

Mathematical operations

math.sqrt(25)

random 🎲

Generate random values

random.randint(1, 10)

datetime 📅

Date and time

datetime.now()

os 💻

Operating system operations

os.getcwd()

sys ⚙️

Python/system information

sys.version

json 🔤

Work with JSON data

json.loads()

re 🔎

Regular expressions

re.search()

collections 📦

Specialized data structures

Counter()

statistics 📊

Statistical calculations

statistics.mean()

functools 🛠️

Functional programming tools

reduce()

🔹 Example

import math

print(math.sqrt(16)) #4.0

No installation is required because math is part of Python's Standard Library.
For example:

import math       # ✅ Standard Library

Whereas libraries such as numpy or pandas generally need to be installed separately.

🧠 Remember

Standard Library = A collection of ready-to-use tools that comes with Python.