Learn Python Regular Expressions step by step from beginner to advanced levels

Overview

Python re(gex)?

Learn Python Regular Expressions step by step from beginner to advanced levels with hundreds of examples and exercises

The book also includes exercises to test your understanding, which is presented together as a single file in this repo — Exercises.md

For solutions to the exercises, see Exercise_solutions.md.

See Version_changes.md to keep track of changes made to the book.


E-book

For a preview of the book, see sample chapters

The book can also be viewed as a single markdown file in this repo. See my blogpost on generating pdf from markdown using pandoc if you are interested in the ebook creation process.

For web version of the book, visit https://learnbyexample.github.io/py_regular_expressions/


Feedback and Contributing

Open an issue if you spot any typo/errors.

⚠️ ⚠️ Please DO NOT submit pull requests. Main reason being any modification requires changes in multiple places.

I'd also highly appreciate your feedback about the book.

Twitter: https://twitter.com/learn_byexample


Table of Contents

  1. Preface
  2. Why is it needed?
  3. re introduction
  4. Anchors
  5. Alternation and Grouping
  6. Escaping metacharacters
  7. Dot metacharacter and Quantifiers
  8. Interlude: Tools for debugging and visualization
  9. Working with matched portions
  10. Character class
  11. Groupings and backreferences
  12. Interlude: Common tasks
  13. Lookarounds
  14. Flags
  15. Unicode
  16. regex module
  17. Gotchas
  18. Further Reading

Acknowledgements

Special thanks to Al Sweigart, for introducing me to Python with his awesome automatetheboringstuff book and video course.


License

The book is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License

The code snippets are licensed under MIT, see LICENSE file

Owner
Sundeep Agarwal
Addicted to writing books and teaching. Likes fantasy books, comics and anime
Sundeep Agarwal
0xFalcon - 0xFalcon Tool For Python

0xFalcone Installation Install 0xFalcone Tool: apt install git git clone https:/

Alharb7 6 Sep 24, 2022
Set up a sidechain for the XRPL quickly and easily

Sidechain Launch Kit Introduction This directory contains python scripts to tests and explore side chains. This document walks through the steps to se

Xpring Engineering 15 Dec 08, 2022
A command-line utility that creates projects from cookiecutters (project templates), e.g. Python package projects, VueJS projects.

Cookiecutter A command-line utility that creates projects from cookiecutters (project templates), e.g. creating a Python package project from a Python

18.6k Jan 02, 2023
Find all social media accounts with a username!

Aliens_eye FIND ALL SOCIAL MEDIA ACCOUNTS WITH A USERNAME! OSINT To install: Open terminal and type: git clone https://github.com/BLINKING-IDIOT/Alien

Aaron Thomas 84 Dec 28, 2022
Python tools for experimenting with differentiable intonation cost measures

Differentiable Intonation Tools The Differentiable Intonation Tools (dit) are a collection of Python functions to analyze the intonation in multitrack

Simon Schwär 2 Mar 27, 2022
Your E-Canteen that is convenient and accessible wherever you are in the campus

Food Web E-Canteen System Your E-Canteen that is convenient and accessible wherever you are in the campus. Table of Contents About The Project Contrib

Pudding 5 Jan 07, 2023
A simple calculator made with tkinter.

Simple Calculator A simple calculator made with tkinter. Requirements None, only you need to have windows 😉 ...Enjoy! Installation Clone this reposit

Abhyush 2 Jan 11, 2022
A python mathematics module

A python mathematics module

Fayas Noushad 4 Nov 28, 2021
tox-gh is a tox plugin which helps running tox on GitHub Actions with multiple different Python versions on multiple workers in parallel

tox-gh is a tox plugin which helps running tox on GitHub Actions with multiple different Python versions on multiple workers in parallel. This project is inspired by tox-travis.

tox development team 19 Dec 26, 2022
【教程】莉沫酱教你学继承!?

【教程】莉沫酱教你学继承! 众所周知,类的继承就是说当一个类死亡的时候,它的子类会获得它拥有的资源。 根据类的继承法不同,各个子类能获得的资源也不同。 继承法的类型 在解释继承法之前,我们先定义三个类,一个父类A,和它的子类B、C。 它们都拥有x、y、z三个属性。

黄巍 17 Dec 05, 2022
Pyfetch - Simple Fetch written in Python

pyfetch Simple Fetch written in Python Screenshots Install Clone this repository

2 Sep 02, 2022
This repository provides a set of easy to understand and tested Python samples for using Acronis Cyber Platform API.

Base Acronis Cyber Platform API operations with Python !!! info Copyright © 2019-2021 Acronis International GmbH. This is distributed under MIT licens

Acronis International GmbH 3 Aug 11, 2022
Repository voor verhalen over de woningbouw-opgave in Nederland

Analyse plancapaciteit woningen In deze notebook zetten we cijfers op een rij om de woningbouwplannen van Nederlandse gemeenten in kaart te kunnen bre

Follow the Money 10 Jun 30, 2022
Automatic certificate unpinning for Android apps

What is this? Script used to perform automatic certificate unpinning of an APK by adding a custom network security configuration that permits user-add

Antoine Neuenschwander 5 Jul 28, 2021
uMap lets you create maps with OpenStreetMap layers in a minute and embed them in your site.

uMap project About uMap lets you create maps with OpenStreetMap layers in a minute and embed them in your site. Because we think that the more OSM wil

771 Dec 29, 2022
A pet facts python api

Pet-Facts-API A pet facts python api Project Links API :- https://pet-facts-api.vercel.app Docs :- https://fayasnoushad.github.io/Pet-Facts-API

Fayas Noushad 3 Dec 18, 2021
A StarkNet project template based on a Pythonic environment

StarkNet Project Template This is an opinionated StarkNet project template. It is based around the Python's ecosystem and best practices. tox to manag

Francesco Ceccon 5 Apr 21, 2022
Zotero references script (and app)

A little script (and PyInstaller build) for a very specific, somewhat hack-ish purpose: managing and exporting project references with Zotero and its API.

Marius Rödder 0 Dec 05, 2021
Why write code when you can import it directly from GitHub Copilot?

Copilot Importer Why write code when you can import it directly from GitHub Copilot? What is Copilot Importer? The copilot python module will dynamica

Mythic 41 Jan 04, 2023
Python implementation of an automatic parallel parking system in a virtual environment, including path planning, path tracking, and parallel parking

Automatic Parallel Parking: Path Planning, Path Tracking & Control This repository contains a python implementation of an automatic parallel parking s

134 Jan 09, 2023