What is Python ?

Python is a high-level, interpreted, general-purpose programming language known for its simplicity, readability, and versatility. It was created by Guido van Rossum and released in 1991.

✅ Key Characteristics of Python:

• Easy to Learn Simple syntax that resembles English
• Interpreted No need for compilation; runs line by line
• High-Level Abstracts away hardware-level details
• Dynamically Typed No need to declare variable types explicitly
• Cross-Platform Runs on Windows, Linux, MacOS, etc.
• Object-Oriented & Procedural Supports both OOP and functional styles
• Extensive Libraries Comes with a rich standard library and external packages

Web Development Package

Package	Purpose	Use Case	Install
Flask	Lightweight web framework	REST API, Small Websites	pip install flask
Django	Full-stack web framework	Large Web Applications	pip install django
FastAPI	High-performance API framework	AI APIs, Backend Services	pip install fastapi
Uvicorn	ASGI Server	Run FastAPI applications	pip install uvicorn
Requests	HTTP Requests	Consume REST APIs	pip install requests
httpx	Async HTTP Client	Async API calls	pip install httpx

Generative AI & LLMs

Package	Purpose
openai	OpenAI API
transformers	Hugging Face Models
langchain	LLM Applications
llama-index	Retrieval-Augmented Generation (RAG)
chromadb	Vector Database
faiss-cpu	Similarity Search
sentence-transformers	Text Embeddings
tiktoken	Token Counting
ollama	Local LLM Integration

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API Development

Package	Purpose
FastAPI	REST APIs
Pydantic	Data Validation
Uvicorn	API Server

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Python setup on Window

https://www.python.org/

https://code.visualstudio.com/

Online Editor

https://colab.research.google.com

Python Setup On VPS Server

• sudo apt update
• sudo apt upgrade -y
• sudo apt install -y python3 python3-pip
• python3 --version
• pip3 --version
• sudo apt install -y python3-venv