Python Telnet D-Link

import telnetlib


LOGIN = 'LOGIN'
PASSWORD = 'PASS'



def activate(HOST):

    def cmd(command):
        dlink.expect(['admin#', '4#', '5#'], 5)
        dlink.write(command + '\n')

    try:
        login_fail = False
        dlink = telnetlib.Telnet(HOST, 23, 3)
        dlink.set_debuglevel(5)
        dlink.expect(['UserName:'], 3)
        dlink.write(LOGIN + '\n')
        dlink.expect(['PassWord:'], 3)
        dlink.write(PASSWORD + '\n')
        a, b, fail = dlink.expect(['Fail!'], 3)
        if 'Fail!' in fail:
            dlink.expect(['UserName:'], 3)
            dlink.write(LOGIN + '\n')
            dlink.expect(['PassWord:'], 3)
            dlink.write(PASSWORD + '\n')
            a, b, fail = dlink.expect(['Fail!'], 3)
            if 'Fail!' in fail:
                login_fail = True
                dlink.close()
                print(HOST, '- fail')
                return HOST, 'fail'
        if not login_fail:
            cmd('config igmp_snooping multicast_vlan_group_profile base add 1.2.3.4-5.6.7.8')
            cmd('config igmp_snooping multicast_vlan_group TV add 1.2.3.4-5.6.7.8')
            cmd('save all')
            cmd('logout')
            dlink.read_all()
            dlink.close()
            print(HOST, '- success')
            return HOST, 'success'
    except EOFError:
        print(HOST, '- fail')
        return HOST, 'fail'
    except:
        print(HOST, '- connection refused')
        return HOST, 'connection refused'


print('Go...')
i, status = activate('192.168.0.2')