Multithread telnet not working Parallel

[anna]

import telnetlib
import re
from time import sleep
user = 'admin'
password = '1234'
ip = '10.19.1.49'
telnet = telnetlib.Telnet(ip, 23, 2)
telnet.read_until('Login:', 3)
telnet.write(user.encode('ascii') + '\r')
telnet.read_until('Password:', 3)
telnet.write(password.encode('ascii') + '\r')
telnet.expect([r"\w+ >$"],2)
telnet.write('dsl -c' + '\r')
telnet.expect([r'\\$'],2)
telnet.write('get bridge port forwarding' +'\r')
telnet.read_until('$')
telnet.write('\x1A')
telnet.expect([r"\w+ >$"],2)
telnet.write(' exit'+'\r')
output = telnet.read_all()
sleep(2)
print(output)

tried about script but not able to print output.
Regex for inner prompt - telnet.expect([r'\\$'],2)
Control character from Control+z -is '\x1A', suggest.. how i can trouble shoot this?