Learn PYTHON with Real Code Examples

Updated Nov 18, 2025

Introduction & Fundamentals Setup & Configuration Architecture & Deep Internals Performance & Security Development Workflow Learning & Career Growth Business & Strategy Examples

Architecture

Interpreter reads -> AST

Bytecode compiled

Virtual machine executes bytecode

Garbage collector manages memory

Optional JIT via PyPy

Rendering Model

Source code -> AST

AST -> bytecode

Executed on CPython VM

Native extensions via C APIs

Architectural Patterns

Monolithic scripting

Modular packages

MVC in Django

Async microservices (FastAPI)

Real World Architectures

ML pipelines

Async APIs

SaaS backends

Data engineering workflows

Design Principles

Readability counts

Explicit is better than implicit

Simple > complex

Developer productivity

Scalability Guide

Use multiprocessing

Use async for I/O

Distribute workloads

Optimize database queries

Migration Guide

Migrate Python 2 -> 3

Move scripts to modules

Convert to async

Package with Poetry