Update app.py

app.py

@@ -143,6 +143,7 @@ def preprocess_video(input_video_path):
 def predict(process_video):
     os.chdir('/home/user/app')
     os.system('bash TestVisual.sh')
+    pred=[]
     with open("/home/user/app/result/ho.txt", 'r') as f:
         pred = f.readlines(prediction)
    return pred[-1]