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Comments on Listen for key events in a CLI app

Post

Listen for key events in a CLI app

+1
−2

I have a Python program like this:

done = False
while u and not done:
    i = u.pop()
    print(f"Processing {i}")
    do_big_task(i)

finish_up()

Since this takes a long time, the user might get tired of waiting. I want the program to also continually listen for a keystroke, such as space, and if the user presses this done will be set to True so that the loop will automatically stop at the next iteration.

Note that I still want finish_up() to run even if the loop is terminated early.

How can I do this?

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3 comment threads

Underresearched (2 comments)
Found on Stack Overflow (1 comment)
Fine-grained? (2 comments)
Fine-grained?
Karl Knechtel‭ wrote 8 months ago

Do you need to be able to interrupt individual calls to do_big_task? Or only check in between each call, whether there has been a keypress since the previous call?

matthewsnyder‭ wrote 8 months ago

No, just checking between calls is enough.