Python for network engineer :- RUN ping test to a destination from multiple routers using Python2.7

Below script is used to run ping test to a destination from all routers.

e.g ip.txt must in same folder where you are storing you python program.

Note:- Make sure router IP must be reachable from the machine where python script is configured.

File used in the scripts are :-
import telnetlib
import time

user = "test"
password = "test"

ips = [i.strip() for i in open("ip.txt")]

for ip in ips:
     telnet = telnetlib.Telnet(ip)
     telnet.read_until("Username: ")
     telnet.write(user + "\n")
     telnet.read_until("Password: ")
     telnet.write(password + "\n")
     telnet.write("ping 192.168.10.100\n") #< 192.168.10.100 is the destination
     time.sleep(1)
     telnet.write("exit\n")
     print telnet.read_all()