from time import sleep
import RPi.GPIO as GPIO
import telnetlib

#GPIO Setup#
GPIO.setmode(GPIO.BCM)

GPIO.setup(4, GPIO.IN)
GPIO.setup(17, GPIO.IN)
GPIO.setup(27, GPIO.IN)
GPIO.setup(22, GPIO.IN)


#Server#
host = '192.168.1.2'
port = '9090'

#Tasten#
while 1:
if GPIO.input(4):
telnet ...