fix

src/preprocess.py

@@ -100,10 +100,10 @@ def splitTopic(topic):
     except ValueError:
         raise InvalidTopicException(topic)
     r = rest.split('/')
-    if (len(r) == 1:
+    if (len(r) == 1):
         deviceId = 'mains',
         variableId = r[0]
-    elif (len(r) == 2:
+    elif (len(r) == 2):
         (deviceId, variableid) = r
     else:
         raise InvalidTopicException(topic)