fix bug 3

app.py

@@ -71,7 +71,7 @@ def process_inference_result(result, class_colors):
 def get_detection_count_display(classes):
   if(len(classes)): 
     disp_str = "[Aircraft detected] "
-    for class_name, count in enumerate(classes.items()):
+    for class_name, count in classes.items():
       disp_str += class_name + ": " + str(count) + "  " 
   else:
     disp_str = "[No aircraft detected]"