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bpo-37330: open() no longer accept 'U' in file mode (GH-16959)

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open(), io.open(), codecs.open() and fileinput.FileInput no longer
accept "U" ("universal newline") in the file mode. This flag was
deprecated since Python 3.3.
This commit is contained in:
Victor Stinner 2019-10-28 15:40:08 +01:00 • committed by GitHub
parent 3bfc8e0fcc
commit e471e72977
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13 changed files with 57 additions and 96 deletions
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Doc/library/functions.rst
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@ -1085,12 +1085,6 @@ are always available. They are listed here in alphabetical order.
first decoded using a platform-dependent encoding or using the specified
*encoding* if given.
There is an additional mode character permitted, ``'U'``, which no longer
has any effect, and is considered deprecated. It previously enabled
:term:`universal newlines` in text mode, which became the default behaviour
in Python 3.0. Refer to the documentation of the
:ref:`newline <open-newline-parameter>` parameter for further details.
.. note::
Python doesn't depend on the underlying operating system's notion of text
@ -1247,10 +1241,6 @@ are always available. They are listed here in alphabetical order.
* The file is now non-inheritable.
.. deprecated-removed:: 3.4 4.0
The ``'U'`` mode.
.. versionchanged::
3.5
@ -1266,6 +1256,10 @@ are always available. They are listed here in alphabetical order.
* On Windows, opening a console buffer may return a subclass of
:class:`io.RawIOBase` other than :class:`io.FileIO`.
.. versionchanged:: 3.9
The ``'U'`` mode has been removed.
.. function:: ord(c)
Given a string representing one Unicode character, return an integer