# Python 3.15.0 alpha 1

DevFeed: [Python 3.15.0 alpha 1](<https://devfeed.tech/articles/python-3-15-0-alpha-1-2380.md>)

Original publisher: [Read original article](<https://blog.python.org/2025/10/python-3150-alpha-1/>)

Author: Hugo van Kemenade

Published: 2025-10-15T00:00:00Z

Content type: release

Language: en

Sources: [Python Insider](<https://devfeed.tech/sources/python-insider.md>)

Topics: [Python](<https://devfeed.tech/topics/python.md>), [releases](<https://devfeed.tech/topics/releases.md>), [Development](<https://devfeed.tech/topics/development.md>), [C](<https://devfeed.tech/topics/c.md>)

Tags: [2025](<https://devfeed.tech/tags/2025.md>), [c](<https://devfeed.tech/tags/c.md>), [developer](<https://devfeed.tech/tags/developer.md>), [development](<https://devfeed.tech/tags/development.md>), [pre-release](<https://devfeed.tech/tags/pre-release.md>), [profiling](<https://devfeed.tech/tags/profiling.md>), [python](<https://devfeed.tech/tags/python.md>), [release](<https://devfeed.tech/tags/release.md>), [releases](<https://devfeed.tech/tags/releases.md>)

## AI overview

Python 3.15.0a1 is the first alpha release in the planned Python 3.15 series. It introduces early changes including a dedicated profiling package, UTF-8 as the default encoding, a new C API for creating Python bytes objects, and improved error messages. The preview is intended for testing and is not recommended for production use.

## Source excerpt

This is an early developer preview of Python 3.15 https://www.python.org/downloads/release/python-3150a1/ Major new features of the 3.15 series, compared to ...