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Issue #10771: Clarify that descriptors get used in an *owner* class or one of its parents.

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Raymond Hettinger 2011-03-22 17:51:57 -07:00
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Doc/reference/datamodel.rst
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@ -1539,11 +1539,11 @@ Implementing Descriptors
^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^
The following methods only apply when an instance of the class containing the The following methods only apply when an instance of the class containing the
method (a so-called *descriptor* class) appears in the class dictionary of method (a so-called *descriptor* class) appears in an *owner* class (the
another new-style class (known as the *owner* class) or one of its descriptor must be in either the owner's class dictionary or in the class
descendants. In the examples below, "the attribute" refers to the attribute dictionary for one of its parents). In the examples below, "the attribute"
whose name is the key of the property in the owner class' ``__dict__``. refers to the attribute whose name is the key of the property in the owner
Descriptors can only be implemented as new-style classes themselves. class' :attr:`__dict__`.
.. method:: object.__get__(self, instance, owner) .. method:: object.__get__(self, instance, owner)