--- lammps-11Apr15/python/lammps.py	2015-03-13 16:06:20.000000000 -0600
+++ lammps-11Apr15-new/python/lammps.py	2015-04-13 09:40:43.000000000 -0600
@@ -28,7 +28,7 @@
     except:
       type,value,tb = sys.exc_info()
       traceback.print_exception(type,value,tb)
-      raise OSError,"Could not load LAMMPS dynamic library"
+      raise OSError("Could not load LAMMPS dynamic library")
 
     # if no ptr provided, create an instance of LAMMPS
     #   don't know how to pass an MPI communicator from PyPar