How do you exit file with Error message?

Question

I ran into a problem with this error message during project 1 and was wondering if anyone could help direct me to somewhere that I can use to help explain this further and how it should be formatted.

Answer 1

Executing the statement sys.exit(-1) ends execution of the program. No statements in the program file following sys.exit(-1) will be executed. The -1 indicates exiting following an error which we would be doing in this case.

In this program, we want to execute sys.exit(-1) when the file didn't have the art extension and after you print an error message.