def on_cleanup_error(function, path, excinfo):
                click.secho("warning: failed to remove file or directory: {}\n"
                            "please delete it manually.".format(path),
                            fg="red")
def _createSocket(self):
        try:
            sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
            self.sock = sock
            return 0
        except socket.error as e:
            sys.stderr.write("[!]\tFailed to create a UDP socket.\n%s.\n" % e)
            return 1