added __setitem__ to Constraint

diff --git a/lib/sqlalchemy/schema.py b/lib/sqlalchemy/schema.py
index dcd023fe9510561d4b8b1e206b260c3dc84fe75b..78dbe38b37f14ac440b281d8f424be6d62fd4ab7 100644 (file)
--- a/lib/sqlalchemy/schema.py
+++ b/lib/sqlalchemy/schema.py
@@ -599,6 +599,8 @@ class Constraint(SchemaItem):
         return len(self.columns)
     def __getitem__(self, index):
         return self.columns[index]
+    def __setitem__(self, index, item):
+        self.columns[index] = item
     def copy(self):
         raise NotImplementedError()