Python 3.15 Updates

As the Python version 3.15 being the latest version, there are a bunch of new things and improvements

in it. In this page, you can get summary of new features and improvements in all versions of Python 3.15.

Python 3.15.2

Released: October 25, 2026

• Security release.
• Blocks compromised eMudhra certificate keys.
• Fixes security issues in tarfile and cookie handling.
• Contains around 130 bug fixes and documentation improvements.

Python 3.15.1

Released: October 21, 2026

• First maintenance release for Python 3.15.
• Contains around 330 bug fixes and improvements.
• Upgrades bundled pip to version 26.2.2.
• Addresses the eMudhra / emSign certificate security incident.

Python 3.15.0

Released: October 9, 2026

• First stable release of Python 3.15.
• UTF-8 is now the default encoding.
• Adds lazy imports for faster startup times.
• Adds the new frozendict built-in type.
• Adds the new sentinel built-in type.
• Introduces unpacking in comprehensions.
• Improves the experimental JIT compiler.
• Improves error messages.
• Adds the Tachyon profiler.

For complete technical details, visit the official Python release notes.