To run the server, run:
> python3 udp_server.py
The default port is 8888. You can manually specify another port by appending it to the command, like so:
> python3 udp_server.py 1234
You can then launch the client on the same port (default 8888, custom same as above)
> python3 udp_client.py [1234]
First of all, set you username with the /pseudo command. The server will send a reply to notify you if the command has been a success.
After this, you can join the list of available people by sending /join. To consult the list of people available to chat, type /clients.