can not run the code on google colab

[Ng-ms]

i am trying to run the code in google code but i am getting this error
" ipykernel_launcher.py: error: unrecognized arguments: -f /root/.local/share/jupyter/runtime/kernel-7e6040c3-bbeb-4dba-af4f-ac79e82e9440.json
An exception has occurred, use %tb to see the full traceback.

SystemExit: 2"

the soultation for this problem is to delete main () , if i delete it i can not run the code !!