diff --git a/Lib/ldap/cidict.py b/Lib/ldap/cidict.py
index a5ac29e0..ac19bd7d 100644
--- a/Lib/ldap/cidict.py
+++ b/Lib/ldap/cidict.py
@@ -53,6 +53,14 @@ def clear(self):
self._keys.clear()
self._data.clear()
+ def copy(self):
+ inst = self.__class__.__new__(self.__class__)
+ inst._data = self._data.copy()
+ inst._keys = self._keys.copy()
+ return inst
+
+ __copy__ = copy
+
# Backwards compatibility
def has_key(self, key):
diff --git a/Tests/t_cidict.py b/Tests/t_cidict.py
index 6878617e..7270bb03 100644
--- a/Tests/t_cidict.py
+++ b/Tests/t_cidict.py
@@ -72,6 +72,19 @@ def test_cidict_data(self):
assert data == {'a': 1, 'b': 2}
self.assertEqual(len(w), 1)
+ def test_copy(self):
+ cix1 = ldap.cidict.cidict(
+ {"a": 1, "B": 2}
+ )
+ cix2 = cix1.copy()
+ self.assertEqual(cix1, cix2)
+ cix1["c"] = 3
+ self.assertNotIn("c", cix2)
+ cix2["C"] = 4
+ self.assertNotEqual(cix1, cix2)
+ self.assertEqual(list(cix1.keys()), ["a", "B", "c"])
+ self.assertEqual(list(cix2.keys()), ["a", "B", "C"])
+
if __name__ == '__main__':
unittest.main()
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