edit handler

handler.py

@@ -18,10 +18,10 @@ class EndpointHandler:
         start = perf_counter()
         prediction = self.pipeline(inputs)
         end = perf_counter()
-        delta = end - start
+        latency = end - start
 
         return {
             "labels": prediction.labels, 
             "scores": prediction.scores,
-            "latency (secs.)": str(delta)
+            "latency (secs.)": latency
         }