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Python Insider

Python 3.15.0 alpha 2 is now available as an early developer preview. Key features include PEP 799's new statistical sampling profiler, UTF-8 as the default encoding (PEP 686), a new PyBytesWriter C API (PEP 782), and improved error messages. This is the second of seven planned alpha releases, with features subject to change until the beta phase begins in May 2026. The next alpha release is scheduled for December 16, 2025.

Python Insider: Python 3.15.0 alpha 2

Major new features of the 3.15 series, compared to 3.14

And now for something completely different