diff --git a/Doc/howto/descriptor.rst b/Doc/howto/descriptor.rst index 66033156a80add..5dd183664a106d 100644 --- a/Doc/howto/descriptor.rst +++ b/Doc/howto/descriptor.rst @@ -990,7 +990,7 @@ The documentation shows a typical use to define a managed attribute ``x``: AttributeError: 'C' object has no attribute '_C__x' To see how :func:`property` is implemented in terms of the descriptor protocol, -here is a mostly pure Python equivalent: +here is a pure Python equivalent that implements most of the core functionality: .. testcode:: @@ -1013,26 +1013,17 @@ here is a mostly pure Python equivalent: if obj is None: return self if self.fget is None: - raise AttributeError( - f'property {self.__name__!r} of {type(obj).__name__!r} ' - 'object has no getter' - ) + raise AttributeError return self.fget(obj) def __set__(self, obj, value): if self.fset is None: - raise AttributeError( - f'property {self.__name__!r} of {type(obj).__name__!r} ' - 'object has no setter' - ) + raise AttributeError self.fset(obj, value) def __delete__(self, obj): if self.fdel is None: - raise AttributeError( - f'property {self.__name__!r} of {type(obj).__name__!r} ' - 'object has no deleter' - ) + raise AttributeError self.fdel(obj) def getter(self, fget): @@ -1105,23 +1096,23 @@ here is a mostly pure Python equivalent: >>> try: ... cc.no_getter ... except AttributeError as e: - ... e.args[0] + ... type(e).__name__ ... - "property 'no_getter' of 'CC' object has no getter" + 'AttributeError' >>> try: ... cc.no_setter = 33 ... except AttributeError as e: - ... e.args[0] + ... type(e).__name__ ... - "property 'no_setter' of 'CC' object has no setter" + 'AttributeError' >>> try: ... del cc.no_deleter ... except AttributeError as e: - ... e.args[0] + ... type(e).__name__ ... - "property 'no_deleter' of 'CC' object has no deleter" + 'AttributeError' >>> CC.no_doc.__doc__ is None True