[Bug #1576241] Let functools.wraps work with built-in functions
diff --git a/Lib/functools.py b/Lib/functools.py
index 8783f08..9643036 100644
--- a/Lib/functools.py
+++ b/Lib/functools.py
@@ -32,7 +32,7 @@
for attr in assigned:
setattr(wrapper, attr, getattr(wrapped, attr))
for attr in updated:
- getattr(wrapper, attr).update(getattr(wrapped, attr))
+ getattr(wrapper, attr).update(getattr(wrapped, attr, {}))
# Return the wrapper so this can be used as a decorator via partial()
return wrapper
diff --git a/Lib/test/test_functools.py b/Lib/test/test_functools.py
index 8dc185b..6012f9f 100644
--- a/Lib/test/test_functools.py
+++ b/Lib/test/test_functools.py
@@ -210,6 +210,13 @@
self.assertEqual(wrapper.attr, 'This is a different test')
self.assertEqual(wrapper.dict_attr, f.dict_attr)
+ def test_builtin_update(self):
+ # Test for bug #1576241
+ def wrapper():
+ pass
+ functools.update_wrapper(wrapper, max)
+ self.assertEqual(wrapper.__name__, 'max')
+ self.assert_(wrapper.__doc__.startswith('max('))
class TestWraps(TestUpdateWrapper):