Making rosnode_cleanup() not wait for y/n from user

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Technically, you could probably hack around this by injecting characters into stdin in some way.

But I would not recommend you do that.

The main thing is: rosnode_cleanup() implements a TUI (text-bsed user interface). It's not meant to be reused as a vanilla function in a library.

If you want to reuse the main functionality, you'd have to call cleanup_master_blacklist(..) with the required arguments directly.

Is there another way to get the equivalent functionality without re-implementing most of rosnode myself?

I'm not sure what you're asking here.

rosnode_cleanup() essentially does this:

pinged, unpinged = rosnode_ping_all()
if unpinged:
    master = rosgraph.Master(ID)
    cleanup_master_blacklist(master, unpinged)

the rest is all just handling user input + output.