Index: /issm/trunk-jpl/src/m/modules/ExpToLevelSet.py
===================================================================
--- /issm/trunk-jpl/src/m/modules/ExpToLevelSet.py	(revision 26374)
+++ /issm/trunk-jpl/src/m/modules/ExpToLevelSet.py	(revision 26375)
@@ -1,2 +1,3 @@
+from ExpToLevelSet_python import ExpToLevelSet_python
 from helpers import fileparts
 from shpread import shpread
@@ -23,5 +24,5 @@
     """
 
-    if isinstance(contourname, basestring):
+    if isinstance(contourname, str):
         path, name, ext = fileparts(contourname)
         if ext == '.shp':