Merged revisions 76571 via svnmerge from

pitrou · pitrou · commit 1fc0d2b364b1 · 2009-11-28T15:58:27.000Z
svn+ssh://pythondev@svn.python.org/python/trunk ........ r76571 | antoine.pitrou | 2009-11-28 16:55:58 +0100 (sam., 28 nov. 2009) | 3 lines Issue #1515: Enable use of deepcopy() with instance methods. Patch by Robert Collins. ........
diff --git a/Lib/copy.py b/Lib/copy.py
@@ -238,6 +238,10 @@ def _deepcopy_dict(x, memo):
 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
@@ -677,6 +677,17 @@ def __init__(self, i):
         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
 
diff --git a/Misc/ACKS b/Misc/ACKS
@@ -144,6 +144,7 @@ Josh Cogliati
 Dave Cole
 Benjamin Collar
 Jeffery Collins
+Robert Collins
 Paul Colomiets
 Matt Conway
 David M. Cooke
diff --git a/Misc/NEWS b/Misc/NEWS
@@ -140,6 +140,9 @@ C-API
 Library
 -------
 
+- Issue #1515: Enable use of deepcopy() with instance methods.  Patch by
+  Robert Collins.
+
 - Issue #7403: logging: Fixed possible race condition in lock creation.
 
 - Issue #6845: Add restart support for binary upload in ftplib.  The
