--- a/utils/seriestables/test_series.py	Thu Mar 11 16:29:39 2010 -0500
+++ b/utils/seriestables/test_series.py	Fri Mar 12 09:02:40 2010 -0500
@@ -65,6 +65,33 @@
     assert compare_lists(table.cols.minibatch[:], [1,2,1,2])
     assert compare_lists(table.cols.validation_error[:], [32.0, 30.0, 28.0, 26.0])
 
+def test_ErrorSeries_no_index(h5f=None):
+    if not h5f:
+        h5f_path = tempfile.NamedTemporaryFile().name
+        h5f = tables.openFile(h5f_path, "w")
+
+    validation_error = series.ErrorSeries(error_name="validation_error",
+                                table_name="validation_error",
+                                hdf5_file=h5f, 
+                                # empty tuple
+                                index_names=tuple(),
+                                title="Validation error with no index")
+
+    # (1,1), (1,2) etc. are (epoch, minibatch) index
+    validation_error.append(tuple(), 32.0)
+    validation_error.append(tuple(), 30.0)
+    validation_error.append(tuple(), 28.0)
+    validation_error.append(tuple(), 26.0)
+
+    h5f.close()
+
+    h5f = tables.openFile(h5f_path, "r")
+    
+    table = h5f.getNode('/', 'validation_error')
+
+    assert compare_lists(table.cols.validation_error[:], [32.0, 30.0, 28.0, 26.0])
+    assert not ("epoch" in dir(table.cols))
+
 def test_ErrorSeries_notimestamp(h5f=None):
     if not h5f:
         h5f_path = tempfile.NamedTemporaryFile().name