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Python 3.13.0b2

Release Date: June 5, 2024

This is a beta preview of Python 3.13

Python 3.13 is still in development. This release, 3.13.0b2, is the second of four beta release previews of 3.13.

Beta release previews are intended to give the wider community the opportunity to test new features and bug fixes and to prepare their projects to support the new feature release.

We strongly encourage maintainers of third-party Python projects to test with 3.13 during the beta phase and report issues found to the Python bug tracker as soon as possible. While the release is planned to be feature complete entering the beta phase, it is possible that features may be modified or, in rare cases, deleted up until the start of the release candidate phase (Tuesday 2024-07-30). Our goal is to have no ABI changes after beta 4 and as few code changes as possible after 3.13.0rc1, the first release candidate. To achieve that, it will be extremely important to get as much exposure for 3.13 as possible during the beta phase.

Two particularly noteworthy changes in beta 2 involve the macOS installer we provide:

  • The minimum supported macOS version was changed from 10.9 to 10.13 (High Sierra). Older macOS versions will not be supported going forward.
  • The macOS installer package now includes an optional additional build of Python 3.13 with the experimental free-threading feature enabled. The free-threaded version, python3.13t, is separate from and co-exists with the traditional GIL-only installation. The free-threaded build is not installed by default; use the Customize option of the installer as explained in the installer readme. Since this is an experimental feature, there may be late-breaking issues found; see the free-threaded macOS build issue on GitHub for the most recent status.

Please keep in mind that this is a preview release and its use is not recommended for production environments.

Major new features of the 3.13 series, compared to 3.12

Some of the new major new features and changes in Python 3.13 are:

New features


Removals and new deprecations

  • PEP 594 (Removing dead batteries from the standard library) scheduled removals of many deprecated modules: aifc, audioop, chunk, cgi, cgitb, crypt, imghdr, mailcap, msilib, nis, nntplib, ossaudiodev, pipes, sndhdr, spwd, sunau, telnetlib, uu, xdrlib, lib2to3.
  • Many other removals of deprecated classes, functions and methods in various standard library modules.
  • C API removals and deprecations. (Some removals present in alpha 1 were reverted in alpha 2, as the removals were deemed too disruptive at this time.)
  • New deprecations, most of which are scheduled for removal from Python 3.15 or 3.16.

(Hey, fellow core developer, if a feature you find important is missing from this list, let Thomas know.)

For more details on the changes to Python 3.13, see What's new in Python 3.13. The next pre-release of Python 3.13 will be 3.13.0b3, currently scheduled for 2024-06-25.

More resources

Full Changelog


Version Operating System Description MD5 Sum File Size GPG Sigstore SBOM
Gzipped source tarball Source release 4b6df6c5111a506f48f63f9174c880aa 26.4 MB SIG .sigstore SPDX
XZ compressed source tarball Source release 6acd28b635dc7456765a69e64b835bfa 20.1 MB SIG .sigstore SPDX
macOS 64-bit universal2 installer macOS for macOS 10.13 and later 37a3a03fdb77230bfd5b87284df34ed9 65.2 MB SIG .sigstore
Windows installer (64-bit) Windows Recommended cbfc7c2363f361bf55d8c37ed6d0e77e 25.7 MB SIG .sigstore SPDX
Windows installer (ARM64) Windows Experimental f206b8d967c1d18f65d28a6d981f47ec 24.9 MB SIG .sigstore SPDX
Windows embeddable package (64-bit) Windows 76afb0395ac2979435a4eeb842adbf0f 11.9 MB SIG .sigstore SPDX
Windows embeddable package (32-bit) Windows 6d3263e7829eba18e6c46ac9d86e673a 10.4 MB SIG .sigstore SPDX
Windows embeddable package (ARM64) Windows 6c9c019a035dbe582c19c03e3f72f7da 11.0 MB SIG .sigstore SPDX
Windows installer (32 -bit) Windows 6183ed6cc68622774f9c81fa4ecc6f7d 24.4 MB SIG .sigstore SPDX