Try in an interactive interpreter: python> "a string" is True
Karsten > Gesendet: Samstag, 04. November 2017 um 16:31 Uhr > Von: "brandon wallace" <nodn...@gmx.us> > An: python-list@python.org > Betreff: Try: Except: evaluates to True every time > > > I have this code that tests a server to see if it is listening on port 123 > runs and evaluates to True every time. Even if the server does not exist but > it is not supposed to do that. I am getting no error message at all. What is > going on with this code? > > > > #!/usr/bin/env python > > import socket > > hostname = ["192.168.1.22", "192.168.1.23", "200.168.1.24", "19.0.0.0"] > port = 123 > > def check_udp(hosts, port_num): > '''Test the UDP port on a remove server.''' > s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) > for host in hosts: > try: > s.connect((host, port_num)) > return "Port 53 is reachable on: %s" % host > except socket.error as e: > return "Error on connect: %s" % e > > check_udp(hostname, port) > -- > https://mail.python.org/mailman/listinfo/python-list > -- https://mail.python.org/mailman/listinfo/python-list
