Python 3.15 defaults to UTF-8 for character encoding. Changes on Windows

On October 9, 2026, Python 3.15.0 was released. When opening a file with open() without specifying a character encoding, it ...
Phoronix

Python 3.15 Released With Experimental JIT Compiler Running Faster

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BetaNews

Python 3.15 arrives with lazy imports, UTF-8 by default and a faster JIT

Python 3.15 reached stable status on Oct. 9, 2026, according to its official release page. Its headline changes put UTF-8 in charge of text encoding by default and introduce an opt-in lazy keyword for ...