2 files changed, 15 insertions, 0 deletions
diff --git a/Lib/copy.py b/Lib/copy.py
index 2646350..789488c 100644
--- a/Lib/copy.py
+++ b/Lib/copy.py
@@ -238,6 +238,10 @@ d[dict] = _deepcopy_dict
 if PyStringMap is not None:
     d[PyStringMap] = _deepcopy_dict
 
+def _deepcopy_method(x, memo): # Copy instance methods
+    return type(x)(x.__func__, deepcopy(x.__self__, memo))
+_deepcopy_dispatch[types.MethodType] = _deepcopy_method
+
 def _keep_alive(x, memo):
     """Keeps a reference to the object x in the memo.
 
diff --git a/Lib/test/test_copy.py b/Lib/test/test_copy.py
index 2af2109..2df0deb 100644
--- a/Lib/test/test_copy.py
+++ b/Lib/test/test_copy.py
@@ -677,6 +677,17 @@ class TestCopy(unittest.TestCase):
         del d
         self.assertEqual(len(v), 1)
 
+    def test_deepcopy_bound_method(self):
+        class Foo(object):
+            def m(self):
+                pass
+        f = Foo()
+        f.b = f.m
+        g = copy.deepcopy(f)
+        self.assertEqual(g.m, g.b)
+        self.assertTrue(g.b.__self__ is g)
+        g.b()
+
 
 def global_foo(x, y): return x+y