python313/PACKAGING-NOTES
Matej Cepl 8e7a85bd98 - Update to 3.13.0~b4:
- Tests
    - gh-121084: Fix test_typing random leaks. Clear typing ABC
      caches when running tests for refleaks (-R option): call
      _abc_caches_clear() on typing abstract classes and their
      subclasses.
    - gh-121160: Add a test for
      readline.set_history_length(). Note that this test may fail
      on readline libraries.
    - gh-121200: Fix test_expanduser_pwd2() of
      test_posixpath. Call getpwnam() to get pw_dir, since it
      can be different than getpwall() pw_dir.
    - gh-121188: When creating the JUnit XML file, regrtest
      now escapes characters which are invalid in XML, such
      as the chr(27) control character used in ANSI escape
      sequences.
  - Library
    - gh-57141: The shallow argument to filecmp.dircmp (new in
      Python 3.13) is now keyword-only.
    - gh-121245: Simplify handling of the history file in
      site.register_readline() helper. The CAN_USE_PYREPL
      variable now will be initialized, when imported.
    - gh-121332: Fix constructor of ast nodes with custom
      _attributes. Previously, passing custom attributes would
      raise a DeprecationWarning. Passing arguments to the
      constructor that are not in _fields or _attributes remains
      deprecated.
    - gh-121279: Avoid NameError for the warnings module when
      accessing the depracated atributes of the importlib.abc
      module.

OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:Factory/python313?expand=0&rev=26
2024-07-22 19:00:44 +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.