In previous pre-releases but it has been postponed to Python 3.11 due to some compatibility concerns.

PEP 597 - Add optional EncodingWarningīpo-38605: from _future_ import annotations ( PEP 563) used to be on this list.

PEP 624 - Remove Py_UNICODE encoder APIs.

PEP 644 - Require OpenSSL 1.1.1 or newer.

PEP 636 - Structural Pattern Matching: Tutorial.

PEP 635 - Structural Pattern Matching: Motivation and Rationale.

PEP 634 - Structural Pattern Matching: Specification.

bpo-12782: Parenthesized context managers are now officially allowed.

PEP 618 - Add Optional Length-Checking To zip.

PEP 626 - Precise line numbers for debugging and other tools.

PEP 612 - Parameter Specification Variables.

PEP 604 - Allow writing union types as X | Y.

PEP 623 - Deprecate and prepare for the removal of the wstr member in PyUnicodeObject.

Major new features of the 3.10 series, compared to 3.9Īmong the new major new features and changes so far:

Although in most cases this was not very noticeable, it was very impactful for long-running applications and certain usage patterns. The memory leak consisted of a small constant amount of bytes in certain function calls from Cython code. This is a special bugfix release ahead of schedule to address a memory leak that was happening on certain function calls when using Cython. Python 3.10.2 is the newest major release of the Python programming language, and it contains many new features and optimizations. This is the second maintenance release of Python 3.10

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