def main():
try:<EOL><INDENT>res = unittest.TextTestRunner(verbosity=<NUM_LIT:2>).run(suite())<EOL><DEDENT>except KeyboardInterrupt:<EOL><INDENT>print("<STR_LIT>")<EOL>return -<NUM_LIT:1><EOL><DEDENT>else:<EOL><INDENT>return <NUM_LIT:0> if res.wasSuccessful() else <NUM_LIT:1><EOL><DEDENT>
The main function.

    Returns:
      Status code.