bpo-27794: Add `name` attribute to `property` class (GH-23967)

1 files changed, 16 insertions, 6 deletions

diff --git a/Doc/howto/descriptor.rst b/Doc/howto/descriptor.rst
index ab5a573..d172c9b 100644
--- a/Doc/howto/descriptor.rst
+++ b/Doc/howto/descriptor.rst
@@ -934,32 +934,42 @@ here is a pure Python equivalent:
             if doc is None and fget is not None:
                 doc = fget.__doc__
             self.__doc__ = doc
+            self._name = ''
+
+        def __set_name__(self, owner, name):
+            self._name = name
 
         def __get__(self, obj, objtype=None):
             if obj is None:
                 return self
             if self.fget is None:
-                raise AttributeError("unreadable attribute")
+                raise AttributeError(f'unreadable attribute {self._name}')
             return self.fget(obj)
 
         def __set__(self, obj, value):
             if self.fset is None:
-                raise AttributeError("can't set attribute")
+                raise AttributeError(f"can't set attribute {self._name}")
             self.fset(obj, value)
 
         def __delete__(self, obj):
             if self.fdel is None:
-                raise AttributeError("can't delete attribute")
+                raise AttributeError(f"can't delete attribute {self._name}")
             self.fdel(obj)
 
         def getter(self, fget):
-            return type(self)(fget, self.fset, self.fdel, self.__doc__)
+            prop = type(self)(fget, self.fset, self.fdel, self.__doc__)
+            prop._name = self._name
+            return prop
 
         def setter(self, fset):
-            return type(self)(self.fget, fset, self.fdel, self.__doc__)
+            prop = type(self)(self.fget, fset, self.fdel, self.__doc__)
+            prop._name = self._name
+            return prop
 
         def deleter(self, fdel):
-            return type(self)(self.fget, self.fset, fdel, self.__doc__)
+            prop = type(self)(self.fget, self.fset, fdel, self.__doc__)
+            prop._name = self._name
+            return prop
 
 .. testcode::
     :hide: