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Commit6e33ba1

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gh-94169: Remove deprecated io.OpenWrapper (#94170)
Remove io.OpenWrapper and _pyio.OpenWrapper, deprecated in Python3.10: just use :func:`open` instead. The open() (io.open()) functionis a built-in function. Since Python 3.10, _pyio.open() is also astatic method.
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‎Doc/whatsnew/3.12.rst‎

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(and corresponding ``EXPERIMENTAL_ISOLATED_SUBINTERPRETERS``)
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have been removed.
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* Remove ``io.OpenWrapper`` and ``_pyio.OpenWrapper``, deprecated in Python
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3.10: just use:func:`open` instead. The:func:`open` (:func:`io.open`)
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function is a built-in function. Since Python 3.10,:func:`_pyio.open` is
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also a static method.
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(Contributed by Victor Stinner in:gh:`94169`.)
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Porting to Python 3.12
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======================

‎Lib/_pyio.py‎

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@@ -303,22 +303,6 @@ def _open_code_with_warning(path):
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open_code=_open_code_with_warning
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def__getattr__(name):
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ifname=="OpenWrapper":
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# bpo-43680: Until Python 3.9, _pyio.open was not a static method and
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# builtins.open was set to OpenWrapper to not become a bound method
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# when set to a class variable. _io.open is a built-in function whereas
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# _pyio.open is a Python function. In Python 3.10, _pyio.open() is now
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# a static method, and builtins.open() is now io.open().
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importwarnings
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warnings.warn('OpenWrapper is deprecated, use open instead',
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DeprecationWarning,stacklevel=2)
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globalOpenWrapper
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OpenWrapper=open
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returnOpenWrapper
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raiseAttributeError(f"module{__name__!r} has no attribute{name!r}")
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# In normal operation, both `UnsupportedOperation`s should be bound to the
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# same object.
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try:

‎Lib/io.py‎

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IncrementalNewlineDecoder,text_encoding,TextIOWrapper)
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def__getattr__(name):
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ifname=="OpenWrapper":
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# bpo-43680: Until Python 3.9, _pyio.open was not a static method and
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# builtins.open was set to OpenWrapper to not become a bound method
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# when set to a class variable. _io.open is a built-in function whereas
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# _pyio.open is a Python function. In Python 3.10, _pyio.open() is now
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# a static method, and builtins.open() is now io.open().
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importwarnings
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warnings.warn('OpenWrapper is deprecated, use open instead',
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DeprecationWarning,stacklevel=2)
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globalOpenWrapper
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OpenWrapper=open
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returnOpenWrapper
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raiseAttributeError("module {__name__!r} has no attribute {name!r}")
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# Pretend this exception was created here.
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UnsupportedOperation.__module__="io"
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‎Lib/test/test_io.py‎

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proc=assert_python_ok('-X','utf8=1','-c',code)
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self.assertEqual(b"utf-8",proc.out.strip())
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@support.cpython_only
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# Depending if OpenWrapper was already created or not, the warning is
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# emitted or not. For example, the attribute is already created when this
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# test is run multiple times.
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@warnings_helper.ignore_warnings(category=DeprecationWarning)
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deftest_openwrapper(self):
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self.assertIs(self.io.OpenWrapper,self.io.open)
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classCMiscIOTest(MiscIOTest):
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io=io
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Remove ``io.OpenWrapper`` and ``_pyio.OpenWrapper``, deprecated in Python
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3.10: just use:func:`open` instead. The:func:`open` (:func:`io.open`)
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function is a built-in function. Since Python 3.10,:func:`_pyio.open` is
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also a static method. Patch by Victor Stinner.

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