https://github.com/python/cpython/commit/acda1757bc682922292215906459c2735ee99c04
commit: acda1757bc682922292215906459c2735ee99c04
branch: main
author: Raymond Hettinger <[email protected]>
committer: rhettinger <[email protected]>
date: 2024-02-20T01:53:25-06:00
summary:
gh-113157: Document and test __get__ for MethodType (gh-115492)
files:
M Doc/howto/descriptor.rst
diff --git a/Doc/howto/descriptor.rst b/Doc/howto/descriptor.rst
index 7d787c1c42df64..e72386a4da4f8a 100644
--- a/Doc/howto/descriptor.rst
+++ b/Doc/howto/descriptor.rst
@@ -1192,6 +1192,10 @@ roughly equivalent to:
"Emulate method_getattro() in Objects/classobject.c"
return getattr(self.__func__, name)
+ def __get__(self, obj, objtype=None):
+ "Emulate method_descr_get() in Objects/classobject.c"
+ return self
+
To support automatic creation of methods, functions include the
:meth:`__get__` method for binding methods during attribute access. This
means that functions are non-data descriptors that return bound methods
@@ -1214,8 +1218,20 @@ descriptor works in practice:
.. testcode::
class D:
- def f(self, x):
- return x
+ def f(self):
+ return self
+
+ class D2:
+ pass
+
+.. doctest::
+ :hide:
+
+ >>> d = D()
+ >>> d2 = D2()
+ >>> d2.f = d.f.__get__(d2, D2)
+ >>> d2.f() is d
+ True
The function has a :term:`qualified name` attribute to support introspection:
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