[PSU] Small changes for correct PSU plugin import (sonic-net#156)

AndriiS · lguohan · commit ab0f1b19e12a · 2017-11-30T11:35:54.000-08:00
diff --git a/sonic_psu/psu_base.py b/sonic_psu/psu_base.py
@@ -8,7 +8,7 @@
 
 try:
     import abc
-except ImportError, e:
+except ImportError as e:
     raise ImportError (str(e) + " - required module not found")
 
 class PsuBase(object):
