What’s New in Python

The “What’s New in Python” series of essays takes tours through the most important changes between major Python versions. They are a “must read” for anyone wishing to stay up-to-date after a new release.

• What’s new in Python 3.14
  • Summary – Release highlights
  • New features
  • Other language changes
  • New modules
  • Improved modules
  • Optimizations
  • Removed
  • Deprecated
  • CPython bytecode changes
  • C API changes
  • Build changes
  • Porting to Python 3.14
  • Notable changes in 3.14.1
  • Notable changes in 3.14.5
• What’s New In Python 3.13
  • Summary – Release Highlights
  • New Features
  • Other Language Changes
  • New Modules
  • Improved Modules
  • Optimizations
  • Removed Modules And APIs
  • New Deprecations
  • CPython Bytecode Changes
  • C API Changes
  • Build Changes
  • Porting to Python 3.13
  • Regression Test Changes
• What’s New In Python 3.12
  • Summary – Release highlights
  • New Features
  • New Features Related to Type Hints
  • Other Language Changes
  • New Modules
  • Improved Modules
  • Optimizations
  • CPython bytecode changes
  • Demos and Tools
  • Deprecated
  • Removed
  • Porting to Python 3.12
  • Build Changes
  • C API Changes
• What’s New In Python 3.11
  • Summary – Release highlights
  • New Features
  • New Features Related to Type Hints
  • Other Language Changes
  • Other CPython Implementation Changes
  • New Modules
  • Improved Modules
  • Optimizations
  • Faster CPython
  • CPython bytecode changes
  • Deprecated
  • Pending Removal in Python 3.12
  • Removed
  • Porting to Python 3.11
  • Build Changes
  • C API Changes
  • Notable changes in 3.11.4
  • Notable changes in 3.11.5
• What’s New In Python 3.10
  • Summary – Release highlights
  • New Features
  • New Features Related to Type Hints
  • Other Language Changes
  • New Modules
  • Improved Modules
  • Optimizations
  • Deprecated
  • Removed
  • Porting to Python 3.10
  • CPython bytecode changes
  • Build Changes
  • C API Changes
  • Notable security feature in 3.10.7
  • Notable security feature in 3.10.8
  • Notable changes in 3.10.12
• What’s New In Python 3.9
  • Summary – Release highlights
  • You should check for DeprecationWarning in your code
  • New Features
  • Other Language Changes
  • New Modules
  • Improved Modules
  • Optimizations
  • Deprecated
  • Removed
  • Porting to Python 3.9
  • Build Changes
  • C API Changes
  • Notable changes in Python 3.9.1
  • Notable changes in Python 3.9.2
  • Notable changes in Python 3.9.3
  • Notable changes in Python 3.9.5
  • Notable security feature in 3.9.14
  • Notable changes in 3.9.17
• What’s New In Python 3.8
  • Summary – Release highlights
  • New Features
  • Other Language Changes
  • New Modules
  • Improved Modules
  • Optimizations
  • Build and C API Changes
  • Deprecated
  • API and Feature Removals
  • Porting to Python 3.8
  • Notable changes in Python 3.8.1
  • Notable changes in Python 3.8.2
  • Notable changes in Python 3.8.3
  • Notable changes in Python 3.8.8
  • Notable changes in Python 3.8.9
  • Notable changes in Python 3.8.10
  • Notable changes in Python 3.8.10
  • Notable changes in Python 3.8.12
  • Notable security feature in 3.8.14
  • Notable changes in 3.8.17
• What’s New In Python 3.7
  • Summary – Release Highlights
  • New Features
  • Other Language Changes
  • New Modules
  • Improved Modules
  • C API Changes
  • Build Changes
  • Optimizations
  • Other CPython Implementation Changes
  • Deprecated Python Behavior
  • Deprecated Python modules, functions and methods
  • Deprecated functions and types of the C API
  • Platform Support Removals
  • API and Feature Removals
  • Module Removals
  • Windows-only Changes
  • Porting to Python 3.7
  • Notable changes in Python 3.7.1
  • Notable changes in Python 3.7.2
  • Notable changes in Python 3.7.6
  • Notable changes in Python 3.7.10
  • Notable changes in Python 3.7.11
  • Notable security feature in 3.7.14
• What’s New In Python 3.6
  • Summary – Release highlights
  • New Features
  • Other Language Changes
  • New Modules
  • Improved Modules
  • Optimizations
  • Build and C API Changes
  • Other Improvements
  • Deprecated
  • Removed
  • Porting to Python 3.6
  • Notable changes in Python 3.6.2
  • Notable changes in Python 3.6.4
  • Notable changes in Python 3.6.5
  • Notable changes in Python 3.6.7
  • Notable changes in Python 3.6.10
  • Notable changes in Python 3.6.13
  • Notable changes in Python 3.6.14
• What’s New In Python 3.5
  • Summary – Release highlights
  • New Features
  • Other Language Changes
  • New Modules
  • Improved Modules
  • Other module-level changes
  • Optimizations
  • Build and C API Changes
  • Deprecated
  • Removed
  • Porting to Python 3.5
  • Notable changes in Python 3.5.4
• What’s New In Python 3.4
  • Summary – Release Highlights
  • New Features
  • New Modules
  • Improved Modules
  • CPython Implementation Changes
  • Deprecated
  • Removed
  • Porting to Python 3.4
  • Changed in 3.4.3
• What’s New In Python 3.3
  • Summary – Release highlights
  • PEP 405: Virtual Environments
  • PEP 420: Implicit Namespace Packages
  • PEP 3118: New memoryview implementation and buffer protocol documentation
  • PEP 393: Flexible String Representation
  • PEP 397: Python Launcher for Windows
  • PEP 3151: Reworking the OS and IO exception hierarchy
  • PEP 380: Syntax for Delegating to a Subgenerator
  • PEP 409: Suppressing exception context
  • PEP 414: Explicit Unicode literals
  • PEP 3155: Qualified name for classes and functions
  • PEP 412: Key-Sharing Dictionary
  • PEP 362: Function Signature Object
  • PEP 421: Adding sys.implementation
  • Using importlib as the Implementation of Import
  • Other Language Changes
  • A Finer-Grained Import Lock
  • Builtin functions and types
  • New Modules
  • Improved Modules
  • Optimizations
  • Build and C API Changes
  • Deprecated
  • Porting to Python 3.3
• What’s New In Python 3.2
  • PEP 384: Defining a Stable ABI
  • PEP 389: Argparse Command Line Parsing Module
  • PEP 391: Dictionary Based Configuration for Logging
  • PEP 3148: The concurrent.futures module
  • PEP 3147: PYC Repository Directories
  • PEP 3149: ABI Version Tagged .so Files
  • PEP 3333: Python Web Server Gateway Interface v1.0.1
  • Other Language Changes
  • New, Improved, and Deprecated Modules
  • Multi-threading
  • Optimizations
  • Unicode
  • Codecs
  • Documentation
  • IDLE
  • Code Repository
  • Build and C API Changes
  • Porting to Python 3.2
• What’s New In Python 3.1
  • PEP 372: Ordered Dictionaries
  • PEP 378: Format Specifier for Thousands Separator
  • Other Language Changes
  • New, Improved, and Deprecated Modules
  • Optimizations
  • IDLE
  • Build and C API Changes
  • Porting to Python 3.1
• What’s New In Python 3.0
  • Common Stumbling Blocks
  • Overview Of Syntax Changes
  • Changes Already Present In Python 2.6
  • Library Changes
  • PEP 3101: A New Approach To String Formatting
  • Changes To Exceptions
  • Miscellaneous Other Changes
  • Build and C API Changes
  • Performance
  • Porting To Python 3.0
• What’s New in Python 2.7
  • The Future for Python 2.x
  • Changes to the Handling of Deprecation Warnings
  • Python 3.1 Features
  • PEP 372: Adding an Ordered Dictionary to collections
  • PEP 378: Format Specifier for Thousands Separator
  • PEP 389: The argparse Module for Parsing Command Lines
  • PEP 391: Dictionary-Based Configuration For Logging
  • PEP 3106: Dictionary Views
  • PEP 3137: The memoryview Object
  • Other Language Changes
  • New and Improved Modules
  • Build and C API Changes
  • Other Changes and Fixes
  • Porting to Python 2.7
  • New Features Added to Python 2.7 Maintenance Releases
  • Acknowledgements
• What’s New in Python 2.6
  • Python 3.0
  • Changes to the Development Process
  • PEP 343: The ‘with’ statement
  • PEP 366: Explicit Relative Imports From a Main Module
  • PEP 370: Per-user site-packages Directory