--- lammps-4Sep15-orig/python/lammps.py	2015-09-02 14:41:38.000000000 -0600
+++ lammps-4Sep15/python/lammps.py	2015-09-08 05:59:16.000000000 -0600
@@ -33,7 +33,7 @@
     except:
       type,value,tb = sys.exc_info()
       traceback.print_exception(type,value,tb)
-      raise OSError,"Could not load LAMMPS dynamic library from %s" % modpath
+      raise OSError("Could not load LAMMPS dynamic library from %s" % modpath)
 
     # if no ptr provided, create an instance of LAMMPS
     #   don't know how to pass an MPI communicator from PyPar