import telnetlib
import getpass
import time

print ("This is telnet service")
HOST = input("Enter your target device IP address: ")
user = input("Enter your device account username: ")
password = getpass.getpass()

tn = telnetlib.Telnet(HOST)

tn.read_until(b"Username: ")
tn.write(user.encode('ascii') +b"n")

if password:
      tn.read_until(b"Password: ")
      tn.write(password.encode('ascii')+b"n")

tn.write(b"terminal length 0n")
tn.write(b"show interface statusn")
time.sleep(3)

output = tn.read_all().decode('ascii')
print (output)