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
Comprehensive OpenAPI schema generator for Django based on pydantic

🗡️ Djagger Automated OpenAPI documentation generator for Django. Djagger helps you generate a complete and comprehensive API documentation of your Dj

13 Nov 26, 2022
A prototype COG-based tile server for sparse Mars datasets

Mars tiler Mars Tiler is a prototype web application that serves tiles from cloud-optimized GeoTIFFs, with an emphasis on supporting planetary dataset

Daven Quinn 3 Mar 23, 2022
Код файнтюнинга оригинального CLIP на русский язык

О чем репозиторий В этом репозитории представлен способ файтюнить оригинальный CLIP на новый язык Почему модель не видит женщину и откуда на картинке

Valentina Biryukova 7 Feb 06, 2022
Integer sets where all subsets have unique sums

Evil Sums Generation of sets of numbers where all constituents are recoverable from a partial sum.

Charlotte 5 Sep 24, 2022
Assignment for python course, BUPT 2021.

pyFuujinrokuDestiny Assignment for python course, BUPT 2021. Notice username and password must be ASCII encoding. If username exists in database, syst

Ellias Kiri Stuart 3 Jun 18, 2021
Create standalone, installable R Shiny apps using Electron

Create standalone, installable R Shiny apps using Electron

Chase Clark 5 Dec 24, 2021
A modern message based async agent framework

Munggoggo A modern message based async agent framework An asyncio based agent platform written in Python and based on RabbitMQ. Agents are isolated pr

24 Dec 28, 2022
Identify unused production dependencies and avoid a bloated virtual environment.

creosote Identify unused production dependencies and avoid a bloated virtual environment. Quickstart # Install creosote in separate virtual environmen

Fredrik Averpil 7 Dec 29, 2022
Experiments with Tox plugin system

The project is an attempt to add to the tox some missing out of the box functionality. Basically it is just an extension for the tool that will be loa

Volodymyr Vitvitskyi 30 Nov 26, 2022
Example code for the book Fluent Python, 1st Edition (O'Reilly, 2015)

Fluent Python, First Edition: example code This repository is archived and will not be updated.

Fluent Python 5.4k Jan 09, 2023
Short, introductory guide for the Python programming language

100 Page Python Intro This book is a short, introductory guide for the Python programming language.

Sundeep Agarwal 185 Dec 26, 2022
OLDBot (Online Lessons Discord Bot)

This program is designed to facilitate online lessons. With this you don't need to get up early. Just config and watch the program resolve itself. It automatically enters to the lesson at the specifi

Da4ndo 1 Nov 21, 2021
Performance data for WASM SIMD instructions.

WASM SIMD Data This repository contains code and data which can be used to generate a JSON file containing information about the WASM SIMD proposal. F

Evan Nemerson 5 Jul 24, 2022
A set of simple functions to upload and fetch pastes on paste.uploadgram.me

pastegram-py A set of simple functions to upload and fetch pastes on paste.uploadgram.me. API Documentation Methods upload_paste(contents: bytes, file

Uploadgram 3 Sep 13, 2022
A simple wrapper to analyse and visualise reinforcement learning agents' behaviour in the environment.

Visrl Visrl (pronounced "visceral") is a simple wrapper to analyse and visualise reinforcement learning agents' behaviour in the environment. Reinforc

Jet New 14 Jun 27, 2022
WordPress-style shortcodes for Python

Python Shortcodes WordPress-style shortcodes for Python Create and use WordPress-style shortcodes in your Python based app. Example # static output de

Bob 1 Dec 22, 2021
Simple Python script I use to manage and build my Reflux themes.

Simple Python script I use to manage and build my Reflux themes. Built for personal use, but anyone can easily fork and tweak to suit thier needs.

Ire 3 Jan 25, 2022
Automated, progress quest-inspired procedural adventuring

Tales of an Endless Journey (TEJ) Automated, progress quest-inspired procedural adventuring What is this project? Journey is the result of many, many

8 Dec 14, 2021
pyinsim is a InSim module for the Python programming language.

PYINSIM pyinsim is a InSim module for the Python programming language. It creates socket connection with LFS and provides many classes, functions and

2 May 12, 2022
Cloth Simulation via Taichi

Cloth Simulation via Taichi

37 Nov 22, 2022