Index: src/org/python/core/PyReversedIterator.java
===================================================================
--- src/org/python/core/PyReversedIterator.java	(revision 0)
+++ src/org/python/core/PyReversedIterator.java	(revision 0)
@@ -0,0 +1,22 @@
+package org.python.core;
+
+public class PyReversedIterator extends PyIterator {
+
+    private PyObject seq;
+    private int idx;
+
+    public PyReversedIterator(PyObject seq) {
+        this.seq = seq;
+        idx = seq.__len__();
+        if (idx > 0 ) 
+        	idx = idx - 1;
+    }
+
+    public PyObject __iternext__() {
+    	//System.out.println("element at = " + idx);
+    	if (idx >= 0)
+    		return seq.__finditem__(idx--);
+    	else 
+    		return null;
+    }
+}
Index: src/org/python/core/__builtin__.java
===================================================================
--- src/org/python/core/__builtin__.java	(revision 3318)
+++ src/org/python/core/__builtin__.java	(working copy)
@@ -110,6 +110,8 @@
 			return fancyCall(new PyObject[] { arg1 });
 		case 43:
 			return fancyCall(new PyObject[] { arg1 });
+		case 45:
+			return __builtin__.reversed(arg1);
 		default:
 			throw info.unexpectedCall(1, false);
 		}
@@ -386,9 +388,8 @@
 		dict.__setitem__("vars", new BuiltinFunctions("vars", 41, 0, 1));
 		dict.__setitem__("xrange", new BuiltinFunctions("xrange", 42, 1, 3));
 		dict.__setitem__("zip", new BuiltinFunctions("zip", 43, 1, -1));
-	
+		dict.__setitem__("reversed", new BuiltinFunctions("reversed", 45, 1));
 		dict.__setitem__("__import__", new ImportFunction());
-	
 	}
 
 	public static PyObject abs(PyObject o) {
@@ -1016,7 +1017,18 @@
 		}
 		return result;
 	}
-
+	
+	public static PyObject reversed(PyObject seq) {
+		if (hasattr(seq, "__getitem__") && 
+				hasattr(seq, "__len__") && 
+				!(seq instanceof PyDictionary)) {
+			
+			return new PyReversedIterator(seq);
+		} else {
+			throw Py.TypeError("argument to reversed() must be a sequence");
+		}
+	}
+	
 	public static PyObject sum(PyObject seq) {
 		return sum(seq, Py.Zero);
 	}
Index: Lib/test/test_enumerate.py
===================================================================
--- Lib/test/test_enumerate.py	(revision 3318)
+++ Lib/test/test_enumerate.py	(working copy)
@@ -131,9 +131,31 @@
     seq = range(10,20000,2)
     res = zip(range(20000), seq)
 
+class TestReversed(unittest.TestCase):
 
+    def test_simple(self):
+        class A:
+            def __getitem__(self, i):
+                if i < 5:
+                    return str(i)
+                raise StopIteration
+            def __len__(self):
+                return 5
+        for data in 'abc', range(5), tuple(enumerate('abc')), A():
+            self.assertEqual(list(data)[::-1], list(reversed(data)))
+        self.assertRaises(TypeError, reversed, {})
+
+# This part is needed when we have obj that has __reversed__ method 
+#    def test_custom_reversed(self):
+#        class A:
+#            def __reversed__(self):
+#                for i in xrange(5):
+#                    yield i
+#        self.assertEqual(list(reversed(A())), range(5))  
+ 
 def test_main(verbose=None):
-    testclasses = (EnumerateTestCase, SubclassTestCase, TestEmpty, TestBig)
+    testclasses = (EnumerateTestCase, SubclassTestCase, TestEmpty, TestBig,
+		   TestReversed)
     for test in testclasses:
         test_support.run_unittest(test)