# Python 3.9.19 documentation

Welcome! This is the official documentation for Python 3.9.19.

Parts of the documentation:

What's new in Python 3.9?
or all "What's new" documents since 2.0

Tutorial
start here

Library Reference
keep this under your pillow

Language Reference
describes syntax and language elements

Python Setup and Usage
how to use Python on different platforms

Python HOWTOs
in-depth documents on specific topics

Installing Python Modules
installing from the Python Package Index & other sources

Distributing Python Modules
publishing modules for installation by others

Extending and Embedding
tutorial for C/C++ programmers

Python/C API
reference for C/C++ programmers

FAQs
frequently asked questions (with answers!)

Indices and tables:

Global Module Index quick access to all modules General Index all functions, classes, terms Glossary the most important terms explained | Search page search this documentation Complete Table of Contents lists all sections and subsections

Meta information:

Reporting bugs Contributing to Docs About the documentation | History and License of Python Copyright