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attrs: Classes Without Boilerplate

Release {sub-ref}release (What's new?)

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Getting Started

attrs is a Python-only package hosted on PyPI.

The following steps will get you up and running in no time:

  • {doc}overview will show you a simple example of attrs in action and introduce you to its philosophy. Afterwards, you can start writing your own classes and understand what drives attrs's design.
  • {doc}examples will give you a comprehensive tour of attrs's features. After reading, you will know about our advanced features and how to use them.
  • {doc}why gives you a rundown of potential alternatives and why we think attrs is still worthwhile -- depending on your needs even superior.
  • If at any point you get confused by some terminology, please check out our {doc}glossary.

If you need any help while getting started, feel free to use the python-attrs tag on Stack Overflow and someone will surely help you out!

Day-to-Day Usage

  • {doc}types help you to write correct and self-documenting code. attrs has first class support for them, yet keeps them optional if you’re not convinced!
  • Instance initialization is one of attrs key feature areas. Our goal is to relieve you from writing as much code as possible. {doc}init gives you an overview what attrs has to offer and explains some related philosophies we believe in.
  • Comparing and ordering objects is a common task. {doc}comparison shows you how attrs helps you with that and how you can customize it.
  • If you want to put objects into sets or use them as keys in dictionaries, they have to be hashable. The simplest way to do that is to use frozen classes, but the topic is more complex than it seems and {doc}hashing will give you a primer on what to look out for.
  • Once you're comfortable with the concepts, our {doc}api contains all information you need to use attrs to its fullest.
  • attrs is built for extension from the ground up. {doc}extending will show you the affordances it offers and how to make it a building block of your own projects.
  • Finally, if you're confused by all the attr.s, attr.ib, attrs, attrib, define, frozen, and field, head over to {doc}names for a very short explanation, and optionally a quick history lesson.

attrs for Enterprise

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Full Table of Contents

:maxdepth: 2
:caption: Getting Started

overview
why
examples

:maxdepth: 2
:caption: Explanations

types
init
comparison
hashing

:maxdepth: 2
:caption: Reference

api
api-attr
glossary

:maxdepth: 2
:caption: Advanced

extending
how-does-it-work

:caption: Meta
:maxdepth: 1

names
license
changelog
PyPI <https://pypi.org/project/attrs/>
GitHub <https://github.com/python-attrs/attrs>
Third-party Extensions <https://github.com/python-attrs/attrs/wiki/Extensions-to-attrs>
Contributing <https://github.com/python-attrs/attrs/blob/main/.github/CONTRIBUTING.md>
Funding <https://hynek.me/say-thanks/>

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