Download Python 3.13

Pin this version: winget install --id Python.Python.3.13 --version 3.13.17 --exact

Security - gh-159894: Bump the version of pip bundled in ensurepip to version 26.2.2.

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Manifest: manifests/p/Python/Python/3/13/3.13.17

Pin this version: winget install --id Python.Python.3.13 --version 3.13.16 --exact

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Manifest: manifests/p/Python/Python/3/13/3.13.16

Pin this version: winget install --id Python.Python.3.13 --version 3.13.15 --exact

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Manifest: manifests/p/Python/Python/3/13/3.13.15

Pin this version: winget install --id Python.Python.3.13 --version 3.13.14 --exact

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Manifest: manifests/p/Python/Python/3/13/3.13.14

Pin this version: winget install --id Python.Python.3.13 --version 3.13.13 --exact

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Manifest: manifests/p/Python/Python/3/13/3.13.13

Pin this version: winget install --id Python.Python.3.13 --version 3.13.12 --exact

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Manifest: manifests/p/Python/Python/3/13/3.13.12

Pin this version: winget install --id Python.Python.3.13 --version 3.13.11 --exact

Security - gh-142145: Remove quadratic behavior in xml.minidom node ID cache clearing. - gh-119451: Fix a potential memory denial of service in the http.client module. When connecting to a malicious server, it could cause an arbitrary amount of memory to be allocated. This could have led to symptoms including a MemoryError, swapping, out of memory (OOM) killed processes or containers, or even system crashes. - gh-119452: Fix a potential memory denial of service in the http.server module. When a malicious user is connected to the CGI server on Windows, it could cause an arbitrary amount of memory to be allocated. This could have led to symptoms including a MemoryError, swapping, out of memory (OOM) killed processes or containers, or even system crashes. Library - gh-140797: Revert changes to the undocumented re.Scanner class. Capturing groups are still allowed for backward compatibility, although using them can lead to incorrect result. They will be forbidden in future Python versions. - gh-142206: The resource tracker in the multiprocessing module now uses the original communication protocol, as in Python 3.14.0 and below, by default. This avoids issues with upgrading Python while it is running. (Note that such ‘in-place’ upgrades are not tested.) The tracker remains compatible with subprocesses that use new protocol (that is, subprocesses using Python 3.13.10, 3.14.1 and 3.15). Core and Builtins - gh-142218: Fix crash when inserting into a split table dictionary with a non…

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Manifest: manifests/p/Python/Python/3/13/3.13.11

Pin this version: winget install --id Python.Python.3.13 --version 3.13.10 --exact

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Manifest: manifests/p/Python/Python/3/13/3.13.10

Pin this version: winget install --id Python.Python.3.13 --version 3.13.9 --exact

Library - gh-139783: Fix inspect.getsourcelines() for the case when a decorator is followed by a comment or an empty line.

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Manifest: manifests/p/Python/Python/3/13/3.13.9

Pin this version: winget install --id Python.Python.3.13 --version 3.13.8 --exact

macOS - gh-124111: Update macOS installer to use Tcl/Tk 8.6.17. - gh-139573: Updated bundled version of OpenSSL to 3.0.18. Windows - gh-139573: Updated bundled version of OpenSSL to 3.0.18. - gh-138896: Fix error installing C runtime on non-updated Windows machines Tools/Demos - gh-139330: SBOM generation tool didn’t cross-check the version and checksum values against the Modules/expat/refresh.sh script, leading to the values becoming out-of-date during routine updates. - gh-137873: The iOS test runner has been simplified, resolving some issues that have been observed using the runner in GitHub Actions and Azure Pipelines test environments. Tests - gh-139208: Fix regrtest --fast-ci --verbose: don’t ignore the --verbose option anymore. Patch by Victor Stinner. Security - gh-139400: xml.parsers.expat: Make sure that parent Expat parsers are only garbage-collected once they are no longer referenced by subparsers created by ExternalEntityParserCreate(). Patch by Sebastian Pipping. - gh-139283: sqlite3: correctly handle maximum number of rows to fetch in Cursor.fetchmany and reject negative values for Cursor.arraysize. Patch by Bénédikt Tran. - gh-135661: Fix CDATA section parsing in html.parser.HTMLParser according to the HTML5 standard: ] ]> and ]] > no longer end the CDATA section. Add private method _set_support_cdata() which can be used to specify how to parse <[CDATA[ — as a CDATA section in foreign content (SVG or MathML) or as a bogus comment in the HTML namespace…

Release notes

Manifest: manifests/p/Python/Python/3/13/3.13.8

Pin this version: winget install --id Python.Python.3.13 --version 3.13.7 --exact

Library - gh-137583: Fix a deadlock introduced in 3.13.6 when a call to ssl.SSLSocket.recv was blocked in one thread, and then another method on the object (such as ssl.SSLSocket.send) was subsequently called in another thread. - gh-137044: Return large limit values as positive integers instead of negative integers in resource.getrlimit(). Accept large values and reject negative values (except RLIM_INFINITY) for limits in resource.setrlimit(). - gh-136914: Fix retrieval of doctest.DocTest.lineno for objects decorated with functools.cache() or functools.cached_property. - gh-131788: Make ResourceTracker.send from multiprocessing re-entrant safe Documentation - gh-136155: We are now checking for fatal errors in EPUB builds in CI. Core and Builtins - gh-137400: Fix a crash in the free threading build when disabling profiling or tracing across all threads with PyEval_SetProfileAllThreads() or PyEval_SetTraceAllThreads() or their Python equivalents threading.settrace_all_threads() and threading.setprofile_all_threads().

Release notes

Manifest: manifests/p/Python/Python/3/13/3.13.7

Pin this version: winget install --id Python.Python.3.13 --version 3.13.6 --exact

macOS - gh-137450: macOS installer shell path management improvements: separate the installer Shell profile updater postinstall script from the Update Shell Profile.command to enable more robust error handling. - gh-137134: Update macOS installer to ship with SQLite version 3.50.4. Windows - gh-137134: Update Windows installer to ship with SQLite 3.50.4. Tools/Demos - gh-135968: Stubs for strip are now provided as part of an iOS install. Tests - gh-135966: The iOS testbed now handles the app_packages folder as a site directory. - gh-135494: Fix regrtest to support excluding tests from --pgo tests. Patch by Victor Stinner. - gh-135489: Show verbose output for failing tests during PGO profiling step with –enable-optimizations. Security - gh-135661: Fix parsing start and end tags in html.parser.HTMLParser according to the HTML5 standard. - Whitespaces no longer accepted between </ and the tag name. E.g. </ script> does not end the script section. - Vertical tabulation (\v) and non-ASCII whitespaces no longer recognized as whitespaces. The only whitespaces are \t\n\r\f and space. - Null character (U+0000) no longer ends the tag name. - Attributes and slashes after the tag name in end tags are now ignored, instead of terminating after the first > in quoted attribute value. E.g. </script/foo=">"/>. - Multiple slashes and whitespaces between the last attribute and closing > are now ignored in both start and end tags. E.g. <a foo=bar/ //>. - Multiple = between attribute name and…

Release notes

Manifest: manifests/p/Python/Python/3/13/3.13.6

Pin this version: winget install --id Python.Python.3.13 --version 3.13.5 --exact

Windows - gh-135151: Avoid distributing modified pyconfig.h in the traditional installer. Extension module builds must always specify Py_GIL_DISABLED when targeting the free-threaded runtime. Tests - gh-135120: Add test.support.subTests(). Library - gh-133967: Do not normalize locale name ‘C.UTF-8’ to ‘en_US.UTF-8’. - gh-135326: Restore support of integer-like objects with __index__() in random.getrandbits(). - gh-135321: Raise a correct exception for values greater than 0x7fffffff for the BINSTRING opcode in the C implementation of pickle. - gh-135276: Backported bugfixes in zipfile.Path from zipp 3.23. Fixed .name, .stem and other basename-based properties on Windows when working with a zipfile on disk. - gh-134151: email: Fix TypeError in email.utils.decode_params() when sorting RFC 2231 continuations that contain an unnumbered section. - gh-134152: email: Fix parsing of email message ID with invalid domain. - gh-127081: Fix libc thread safety issues with os by replacing getlogin with getlogin_r re-entrant version. - gh-131884: Fix formatting issues in json.dump() when both indent and skipkeys are used. Core and Builtins - gh-135171: Roll back changes to generator and list comprehensions that went into 3.13.4 to fix gh-127682, but which involved semantic and bytecode changes not appropriate for a bugfix release. C API - gh-134989: Fix Py_RETURN_NONE, Py_RETURN_TRUE and Py_RETURN_FALSE macros in the limited C API 3.11 and older: don’t treat Py_None, Py_True and Py_False…

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Manifest: manifests/p/Python/Python/3/13/3.13.5

Pin this version: winget install --id Python.Python.3.13 --version 3.13.4 --exact

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Manifest: manifests/p/Python/Python/3/13/3.13.4

Pin this version: winget install --id Python.Python.3.13 --version 3.13.3 --exact

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Manifest: manifests/p/Python/Python/3/13/3.13.3

Pin this version: winget install --id Python.Python.3.13 --version 3.13.2 --exact

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Manifest: manifests/p/Python/Python/3/13/3.13.2

Pin this version: winget install --id Python.Python.3.13 --version 3.13.1 --exact

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Manifest: manifests/p/Python/Python/3/13/3.13.1

Pin this version: winget install --id Python.Python.3.13 --version 3.13.0 --exact

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Manifest: manifests/p/Python/Python/3/13/3.13.0