diff options
Diffstat (limited to 'Lib/_pyio.py')
| -rw-r--r-- | Lib/_pyio.py | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/Lib/_pyio.py b/Lib/_pyio.py index cb5a619f02a..56e9a0cb33c 100644 --- a/Lib/_pyio.py +++ b/Lib/_pyio.py @@ -311,18 +311,20 @@ except AttributeError: open_code = _open_code_with_warning -class DocDescriptor: - """Helper for builtins.open.__doc__ - """ - def __get__(self, obj, typ=None): - return ( - "open(file, mode='r', buffering=-1, encoding=None, " - "errors=None, newline=None, closefd=True)\n\n" + - open.__doc__) - - -# bpo-43680: Alias to open() kept for backward compatibility -OpenWrapper = open +def __getattr__(name): + if name == "OpenWrapper": + # bpo-43680: Until Python 3.9, _pyio.open was not a static method and + # builtins.open was set to OpenWrapper to not become a bound method + # when set to a class variable. _io.open is a built-in function whereas + # _pyio.open is a Python function. In Python 3.10, _pyio.open() is now + # a static method, and builtins.open() is now io.open(). + import warnings + warnings.warn('OpenWrapper is deprecated, use open instead', + DeprecationWarning, stacklevel=2) + global OpenWrapper + OpenWrapper = open + return OpenWrapper + raise AttributeError(name) # In normal operation, both `UnsupportedOperation`s should be bound to the |