forked from pool/python314
Matej Cepl
089998e4e3
Python 3.14 is the latest stable release of the Python
programming language, with a mix of changes to the language,
the implementation, and the standard library. The biggest
changes include template string literals, deferred evaluation
of annotations, and support for subinterpreters in the standard
library.
The library changes include significantly improved capabilities
for introspection in asyncio, support for Zstandard via a new
compression.zstd module, syntax highlighting in the REPL, as
well as the usual deprecations and removals, and improvements
in user-friendliness and correctness.
- Interpreter improvements:
- PEP 649 and PEP 749: Deferred evaluation of annotations
- PEP 734: Multiple interpreters in the standard library
- PEP 750: Template strings
- PEP 758: Allow except and except* expressions without
brackets
- PEP 765: Control flow in finally blocks
- PEP 768: Safe external debugger interface for CPython
- A new type of interpreter
- Free-threaded mode improvements
- Improved error messages
- Incremental garbage collection
- Significant improvements in the standard library:
- PEP 784: Zstandard support in the standard library
- Asyncio introspection capabilities
- Concurrent safe warnings control
- Syntax highlighting in the default interactive shell, and
color output in several standard library CLIs
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:Factory/python314?expand=0&rev=104
27 lines
1.1 KiB
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27 lines
1.1 KiB
Plaintext
Notes for packagers of Python3
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0. Faster build turnaround
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--------------------------
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By default, python builds with profile-guided optimization. This needs
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an additional run of the test suite and it is generally slow.
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PGO build takes around 50 minutes.
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For development, use "--without profileopt" option to disable PGO. This
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shortens the build time to ~5 minutes including test suite.
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1. import_failed.map
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----------------------
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This is a mechanism installed as part of python3-base, that places shim modules
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on python's path (through a generated zzzz-import-failed-hooks.pth file, so that
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it is imported as much at the end as makes sense; and an _import_failed subdir
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of /usr/lib/pythonX.Y). Then when the user tries to import a module that is part
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of a subpackage, the ImportError will contain a helpful message telling them
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which missing subpackage to install.
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This can sometimes cause problems on non-standard configurations, if the pth
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gets included too early (for instance if you are using a script to include all
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pths by hand in some strange order). Just something to look out for.
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