In [62]: import logging
    ...: from telnetlib import Telnet
    ...:
    ...: tn = Telnet('127.0.0.1', 6024, timeout=10)
    ...: tn.set_debuglevel(logging.DEBUG)
    ...:
    ...: tn.write(b'settings.attributes["BOT_NAME"]n')
    ...: tn.read_until(b'n>>>', timeout=10)
Telnet(127.0.0.1,6024): send b'settings.attributes["BOT_NAME"]n'
Telnet(127.0.0.1,6024): recv b'xffxfd"xffxfdx1fxffxfdx03xffxfbx01x1bc>>> x1b[4hsettings.attributes["BOT_NAM'
Telnet(127.0.0.1,6024): IAC DO 34
Telnet(127.0.0.1,6024): IAC DO 31
Telnet(127.0.0.1,6024): IAC DO 3
Telnet(127.0.0.1,6024): IAC WILL 1
Telnet(127.0.0.1,6024): recv b'E"]rrrn<SettingsAttribute value='demo' priority=20'
Telnet(127.0.0.1,6024): recv b'>rrrn>>> '
Out[62]: b'x1bc>>> x1b[4hsettings.attributes["BOT_NAME"]rrrn<SettingsAttribute value='demo' priority=20>rrrn>>>'

In [15]: import logging
    ...: from telnetlib import Telnet
    ...:
    ...: tn = Telnet('127.0.0.1', 6024, timeout=10)
    ...: tn.set_debuglevel(logging.DEBUG)

In [16]: tn.read_until(b'Username: ', timeout=10)
Telnet(127.0.0.1,6024): recv b'Username: '
Out[16]: b'Username: '

In [17]: tn.write(b'scrapyn')
Telnet(127.0.0.1,6024): send b'scrapyn'

In [18]: tn.read_until(b'Password: ', timeout=10)
Telnet(127.0.0.1,6024): recv b'xffxfbx01Password: '
Telnet(127.0.0.1,6024): IAC WILL 1
Unhandled error in Deferred:
2019-03-14 21:31:12 [twisted] CRITICAL: Unhandled error in Deferred:

Traceback (most recent call last):
Failure: twisted.conch.telnet.OptionRefused: twisted.conch.telnet.OptionRefused:b'x01'

Ou2019-03-14 21:31:12 [twisted] CRITICAL:
twisted.conch.telnet.OptionRefused: twisted.conch.telnet.OptionRefused:b'x01't
[18]: b'Password: '

In [19]: tn.write(b'f5e435eb420c32cdn')
Telnet(127.0.0.1,6024): send b'f5e435eb420c32cdn'

Unhandled error in Deferred:
2019-03-14 21:31:27 [twisted] CRITICAL: Unhandled error in Deferred:

Traceback (most recent call last):
Failure: twisted.conch.telnet.AlreadyDisabled: twisted.conch.telnet.AlreadyDisabled:b'x01'

2019-03-14 21:31:27 [twisted] CRITICAL:
twisted.conch.telnet.AlreadyDisabled: twisted.conch.telnet.AlreadyDisabled:b'x01'
In [20]: tn.read_until(b'n>>>', timeout=10)
Out[20]: b''

In [21]: tn.write(b'settings.attributes["BOT_NAME"]n')
Telnet(127.0.0.1,6024): send b'settings.attributes["BOT_NAME"]n'

In [22]: tn.read_until(b'n>>>', timeout=10)
Out[22]: b''