Update app.py

app.py

@@ -143,7 +143,7 @@ def parallel(*pairs):
 
     for pair in pairs:
         f = pair.pop(0)
-        running_tasks.append(Process(target=task, args(*pair)))
+        running_tasks.append(Process(target=task, args=(*pair)))
     for running_task in running_tasks:
         running_task.start()
     for running_task in running_tasks: