Fix "NameError: name 'OptionValueError' is not defined"

pbowyer · pbowyer · commit 1af4784db76f · 2015-11-04T18:00:23.000Z
diff --git a/mprof b/mprof
@@ -9,7 +9,7 @@ import copy
 import time
 import math
 
-from optparse import OptionParser
+from optparse import OptionParser, OptionValueError
 
 import memory_profiler as mp
 
