Index: wflow-py/wflow/wflow_bmi.py
===================================================================
diff -u -r23e11ea1e378a546e1a3755b9820c95c4b371420 -r72e2f53fd1c07133b9c15f3353d95b7f5b75fa32
--- wflow-py/wflow/wflow_bmi.py	(.../wflow_bmi.py)	(revision 23e11ea1e378a546e1a3755b9820c95c4b371420)
+++ wflow-py/wflow/wflow_bmi.py	(.../wflow_bmi.py)	(revision 72e2f53fd1c07133b9c15f3353d95b7f5b75fa32)
@@ -437,8 +437,13 @@
     def set_value_at_indices(self, long_var_name, inds, src):
         raise NotImplementedError
 
+class BmiGridType(object):
+    UNKNOWN = 0
+    UNIFORM = 1
+    RECTILINEAR = 2
+    STRUCTURED = 3
+    UNSTRUCTURED = 4
 
-
 class BmiRaster(wflowbmi_csdms):
     def get_grid_shape(self, long_var_name):
         raise NotImplementedError