Index: /issm/trunk-jpl/src/m/plot/processmesh.py
===================================================================
--- /issm/trunk-jpl/src/m/plot/processmesh.py	(revision 25455)
+++ /issm/trunk-jpl/src/m/plot/processmesh.py	(revision 25456)
@@ -13,5 +13,5 @@
     TODO:
     - Test application of matlplotlib.delaunay
-    - Test that output of delaunay matches output of delaunay in MATLAB (see 
+    - Test that output of delaunay matches output of delaunay in MATLAB (see
     src/m/plot/processmesh.m)
     """
@@ -62,5 +62,5 @@
         z = np.zeros(np.shape(md.mesh.x))
     z = options.getfieldvalue('z', z)
-    if isinstance(z, basestring):
+    if isinstance(z, str):
         z = getattr(md, z)
 
@@ -90,5 +90,5 @@
         z = z * unit
 
-    #is model a member of planet class? 
+    #is model a member of planet class?
     #
     # TODO: Change this when planet class defined (see src/m/plot/processmesh.m)