No module named 'telnetlib'

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File "/home/user/routersploit/rsf.py", line 10, in
from routersploit.interpreter import RoutersploitInterpreter
File "/home/user/routersploit/routersploit/interpreter.py", line 14, in
from routersploit.core.exploit.exceptions import RoutersploitException
File "/home/user/routersploit/routersploit/core/exploit/init.py", line 28, in
from routersploit.core.exploit.shell import shell
File "/home/user/routersploit/routersploit/core/exploit/shell.py", line 2, in
import telnetlib
ModuleNotFoundError: No module named 'telnetlib'