improved_testing

import getpass
import telnetlib
from time import sleep

class Account:
    def __init__(self, login, password, host):
        self.login = login
        self.password = password
        self.host = host

    def __repr__(self):
        return "Account (%s:%s @ %s)" % (self.login, self.password, self.host)

def connect(user,password,host):
    tn = telnetlib.Telnet(host)
    tn.read_until(b': ')
    tn.write(user.encode('ascii')+b'\n')
    if password:
        tn.read_until(b': ')
        tn.write(password.encode('ascii')+b'\n')
    else:
        tn.read_until(b': ')
        tn.write(b'\n')
    tn.set_debuglevel(10000)
    sleep(1)
    tn.write('ls'.encode('ascii')+b'\n')
    return tn.read_all().decode('ascii')

address = input("Enter ip-address: ")
user = input("Enter your login: ")
password = getpass.getpass()

acc = Account(user, password, address)
print(acc)

connect(acc.login, acc.password, acc.host)