Python Introduction

byMy Scribble Pads •August 11, 2025

Python Introduction

1. What is Python?

High-level: Easy to read and write (like English).
Interpreted: Runs without compiling into machine code.
General-purpose: Can be used for web, data, AI, automation, etc.
Open-source: Free to use and modify.
Cross-platform: Works on Windows, Mac, Linux.

2. Key Features

Simple Syntax – Easy to learn for beginners.
Object-Oriented – Supports classes and objects.
Extensive Libraries – Built-in modules + third-party packages.
Dynamically Typed – No need to declare variable types.
Portable – Same code runs on multiple OS.

3. Python Applications

Web development (Django, Flask)
Data science & analytics (Pandas, NumPy)
Artificial Intelligence & Machine Learning (TensorFlow, PyTorch)
Automation & scripting
Game development (Pygame)
Desktop & GUI applications (Tkinter, PyQt)

4. Python Basics

Comments:
```
# This is a comment
```
Variables:
```
name = "Alice"
age = 25
```
Data Types:
- String (str), Integer (int), Float (float), Boolean (bool)
- List, Tuple, Set, Dictionary

Input/Output:

name = input("Enter name: ")
print("Hello", name)

5. Example Code

# Simple Python program
print("Welcome to Python!")

x = 5
y = 3
print("Sum:", x + y)

6. Advantages

Beginner-friendly
Huge community support
Works well with other languages (C, Java, etc.)
Suitable for both small scripts and large applications

7. Disadvantages

Slower than compiled languages (like C++)
Not ideal for mobile app development
High memory usage for large-scale systems

8. How to Install & Run Python

Download from python.org
Install and check version:
```
python --version
```
Run a script:
```
python myscript.py
```

Tags: Python Python Core