(s, f)
receive the SIGINT signal from unittest script
    and exit correctly
receive the SIGINT signal from unittest script
    and exit correctly
receive the SIGINT signal from unittest script and exit correctly
def sigint_handler(s, f):
    """receive the SIGINT signal from unittest script
    and exit correctly"""
    print('api standalone server: SIGINT received, exit')
    sys.exit()
def sigint_handler ( s , f ) : print ( 'api standalone server: SIGINT received, exit' ) sys . exit ( )