=== modified file 'Lib/copy.py'
--- Lib/copy.py	2009-05-15 16:54:52 +0000
+++ Lib/copy.py	2009-11-27 09:54:12 +0000
@@ -260,6 +260,10 @@
 if PyStringMap is not None:
     d[PyStringMap] = _deepcopy_dict
 
+def _deepcopy_method(x, memo): # Copy instance methods
+    return type(x)(x.im_func, deepcopy(x.im_self, memo), x.im_class)
+_deepcopy_dispatch[types.MethodType] = _deepcopy_method
+
 def _keep_alive(x, memo):
     """Keeps a reference to the object x in the memo.
 
@@ -413,5 +417,14 @@
     print map(repr.repr, l2)
     print map(repr.repr, l3)
 
+    class Foo(object):
+        def m(self):
+            pass
+    f = Foo()
+    f.b = f.m
+    g = deepcopy(f)
+    assert g.m == g.b
+    assert g.m.im_self is g
+
 if __name__ == '__main__':
     _test()