Get problems when converting a command line program to a network call using the telentd tool

Hi:
I have a command line program written in python-prompt-toolkit.Now I use the busybox_TELNETD tool to convert it into a network telnet call.It is my sample code.

#!./venv/bin/python
# coding=UTF-8
from prompt_toolkit import prompt
if __name__ == '__main__':
    answer = prompt('Give me some input: ')
    print('You said: %s' % answer)

then I use telentd.
./busybox_TELNETD -l ./main_1.py -b 0.0.0.0:9999 -F
then I use telnet to test is.Everything is ok.

But I get problems when I use the python library telnetlib.

I got a warning and didn't get str 'Give me some input: '
how could I solve this?

Start with the provided main_1.py example, the prompt_toolkit prompt call, and the Python telnetlib client used against busybox_TELNETD. Compare the telnetlib session with the working interactive telnet session and determine whether the prompt appears and input completes; document the confirmed cause and compatible interaction.