Index: src/org/python/core/CollectionIter2.java
===================================================================
--- src/org/python/core/CollectionIter2.java	(revision 3189)
+++ src/org/python/core/CollectionIter2.java	(working copy)
@@ -2,6 +2,8 @@
 
 package org.python.core;
 
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
 import java.util.*;
 
 class CollectionIter2 extends CollectionIter {
@@ -19,7 +21,16 @@
         if (object instanceof Iterator) {
             return new IteratorIter(((Iterator) object));
         }
-
+        try {
+            Method m = object.getClass().getMethod("iterator", new Class[0]);
+            if (Iterator.class.isAssignableFrom(m.getReturnType())) {
+                return new IteratorIter((Iterator)m.invoke(object, new Object[0]));
+            }
+        } catch(NoSuchMethodException e) {
+        } catch(IllegalArgumentException e) {
+        } catch(IllegalAccessException e) {
+        } catch(InvocationTargetException e) {
+        }
         return null;
     }
 }