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bpo-29240: PEP 540: Add a new UTF-8 Mode (#855)

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* Add -X utf8 command line option, PYTHONUTF8 environment variable
  and a new sys.flags.utf8_mode flag.
* If the LC_CTYPE locale is "C" at startup: enable automatically the
  UTF-8 mode.
* Add _winapi.GetACP(). encodings._alias_mbcs() now calls
  _winapi.GetACP() to get the ANSI code page
* locale.getpreferredencoding() now returns 'UTF-8' in the UTF-8
  mode. As a side effect, open() now uses the UTF-8 encoding by
  default in this mode.
* Py_DecodeLocale() and Py_EncodeLocale() now use the UTF-8 encoding
  in the UTF-8 Mode.
* Update subprocess._args_from_interpreter_flags() to handle -X utf8
* Skip some tests relying on the current locale if the UTF-8 mode is
  enabled.
* Add test_utf8mode.py.
* _Py_DecodeUTF8_surrogateescape() gets a new optional parameter to
  return also the length (number of wide characters).
* pymain_get_global_config() and pymain_set_global_config() now
  always copy flag values, rather than only copying if the new value
  is greater than the old value.
This commit is contained in:
Victor Stinner 2017-12-13 12:29:09 +01:00 • committed by GitHub
parent c3e070f849
commit 91106cd9ff
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27 changed files with 598 additions and 183 deletions
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13
Doc/using/cmdline.rst
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@ -439,6 +439,9 @@ Miscellaneous options
* Set the :attr:`~sys.flags.dev_mode` attribute of :attr:`sys.flags` to
``True``
* ``-X utf8`` enables the UTF-8 mode, whereas ``-X utf8=0`` disables the
UTF-8 mode.
It also allows passing arbitrary values and retrieving them through the
:data:`sys._xoptions` dictionary.
@ -455,7 +458,7 @@ Miscellaneous options
The ``-X showalloccount`` option.
.. versionadded:: 3.7
The ``-X importtime`` and ``-X dev`` options.
The ``-X importtime``, ``-X dev`` and ``-X utf8`` options.
Options you shouldn't use
@ -816,6 +819,14 @@ conflict.
.. versionadded:: 3.7
.. envvar:: PYTHONUTF8
If set to ``1``, enable the UTF-8 mode. If set to ``0``, disable the UTF-8
mode. Any other non-empty string cause an error.
.. versionadded:: 3.7
Debug-mode variables
~~~~~~~~~~~~~~~~~~~~