Added copy and __copy__ methods to the OrderedDict. Fixes #1377.

2 files changed, 19 insertions, 1 deletions

diff --git a/lib/sqlalchemy/util.py b/lib/sqlalchemy/util.py
index 038040d87..dbc7d3ea4 100644
--- a/lib/sqlalchemy/util.py
+++ b/lib/sqlalchemy/util.py
@@ -688,6 +688,12 @@ class OrderedDict(dict):
         self._list = []
         dict.clear(self)
 
+    def copy(self):
+        return self.__copy__()
+
+    def __copy__(self):
+        return OrderedDict(self)
+
     def sort(self, *arg, **kw):
         self._list.sort(*arg, **kw)
 
diff --git a/test/base/utils.py b/test/base/utils.py
index 0b7762b7d..bc3fc0283 100644
--- a/test/base/utils.py
+++ b/test/base/utils.py
@@ -1,5 +1,5 @@
 import testenv; testenv.configure_for_tests()
-import threading, unittest
+import copy, threading, unittest
 from sqlalchemy import util, sql, exc
 from testlib import TestBase
 from testlib.testing import eq_, is_, ne_
@@ -55,6 +55,18 @@ class OrderedDictTest(TestBase):
         o = util.OrderedDict([('name', 'jbe'), ('fullname', 'jonathan'), ('password', '')])
         eq_(o.keys(), ['name', 'fullname', 'password'])
 
+    def test_odict_copy(self):
+        o = util.OrderedDict()
+        o["zzz"] = 1
+        o["aaa"] = 2
+        eq_(o.keys(), ['zzz', 'aaa'])
+
+        o2 = o.copy()
+        eq_(o2.keys(), o.keys())
+
+        o3 = copy.copy(o)
+        eq_(o3.keys(), o.keys())
+
 class OrderedSetTest(TestBase):
     def test_mutators_against_iter(self):
         # testing a set modified against an iterator