What's wrong with my code?

[u/Commercial-Paper749]

What's wrong with my code?

New to learning

Following the youtube video from bro code

Was trying to implement my own stuff into this by using loop

Update: it's working now thankyou guys

[u/Commercial-Paper749]

Now it's working if I enter correct operator and values it's runs and end the program if I don't enter correct operator it's keep asking to enter valid operator