import pexpect

SERVER = { 1: 'server1',
            2: 'server2',
            3: 'server3',
            etc }
for key in sorted(SERVER):
	print key, SERVER[key]

CHOICE = int(input("Type in server number: "))
HOST = SERVER[CHOICE]
USER="username"
PASS="password"
COMMAND="ssh -vNCD 23333 USER@HOST"

child = pexpect.spawn(COMMAND)
child.expect('Password:')
child.sendline(PASS)
child.interact()