Python sys.exit () function description

The Sys.exit () function terminates the process by throwing an exception, which means that the program will not exit if the exception it throws is caught.

#!/usr/bin/python#!coding:utf-8ImportSYSif __name__=="__main__":    Try: Sys.exit (100)    exceptSystemexit,err:Print 'catch to Systemexit exception, Systemexit does not derive from exception so it is useless with exception'        Print 'The Systemexit exception information is as follows: {0}'. Format (ERR)Print 'did not quit Ah ...'

The output information is as follows:

Catch to Systemexit exception, Systemexit does not derive from exception so it is useless with exception
Systemexit exception information is as follows: 100
Did not quit Ah ...

Python sys.exit () function description