- cmd = "ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i %s %s@%s -R %s:localhost:%s sleep 600 > ssh_tunnel.%s 2>&1 < /dev/null &" \
- % (self.key_file, self.node_user_name, node_ip,
- self.conf.consumer.port, self.conf.consumer.port, node_ip)
+ cmd = ("ssh -o UserKnownHostsFile=/dev/null"
+ " -o StrictHostKeyChecking=no"
+ " -i %s %s@%s -R %s:localhost:%s"
+ " sleep 600 > ssh_tunnel.%s 2>&1 < /dev/null &"
+ % (self.key_file, self.node_user_name,
+ node_ip, self.conf.consumer.port,
+ self.conf.consumer.port, node_ip))