I am currently developing a simple application in python that connects to a server. At the moment, it's single-threaded (as multithreading is not currently required).
However I would like - for debugging, maintenance and such to also be able to have a REPL via stdin.
How do I go about that, if possible? Will I need to keep anything in mind? Will I have to make a separate thread for it?
You either need to go non-blocking or use a thread.
I would personally use Twisted for concurrency, which also offers a REPL-protocol which is easy to integrate.
There's also rfoo. From the README:
rconsole - included with rfoo package is a remote Python console with auto completion, which can be used to inspect and modify namespace of a running script.
To activate in a script do:
from rfoo.utils import rconsole
rconsole.spawn_server()
To attach from a shell do:
$ rconsole
SECURITY NOTE:
The rconsole listener started with spawn_server() will accept any local connection and may therefore be insecure to use in shared hosting or similar environments!
Maybe this question could help. You can modify it a bit to create a customized REPL.
