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python313/PACKAGING-NOTES
Matej Cepl 978bc1ef01 - Update to 3.13.6:
Python 3.13.6 final
Release date: 2025-08-06
  - 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 value are no
          longer collapsed. E.g. <a foo==bar> produces attribute

OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:Factory/python313?expand=0&rev=115
2025-08-07 10:16:41 +00:00

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Notes for packagers of Python3
==============================
0. Faster build turnaround
--------------------------
By default, python builds with profile-guided optimization. This needs
an additional run of the test suite and it is generally slow.
PGO build takes around 50 minutes.
For development, use "--without profileopt" option to disable PGO. This
shortens the build time to ~5 minutes including test suite.
1. import_failed.map
----------------------
This is a mechanism installed as part of python3-base, that places shim modules
on python's path (through a generated zzzz-import-failed-hooks.pth file, so that
it is imported as much at the end as makes sense; and an _import_failed subdir
of /usr/lib/pythonX.Y). Then when the user tries to import a module that is part
of a subpackage, the ImportError will contain a helpful message telling them
which missing subpackage to install.
This can sometimes cause problems on non-standard configurations, if the pth
gets included too early (for instance if you are using a script to include all
pths by hand in some strange order). Just something to look out for.