How can I handle two exceptions differently (action 1 and 2), but if they occur together handle them with action 1?

Question

Let's say I have this piece of code in Python:

while True:
    try:
        raise CustomError

    except CustomError:
        # Action1

    except KeyboardInterrupt:
        # Action2

I want whenever CustomError happens, Action1 handles it. But if and only if I have a KeyboardInterruptError , then Action2 happens (even though CustomError is still raised). Now what happens in my code is Action1 always happens and if user press CTRL+C , the code ignores it and still Action1 occurs.

I would appreciate it if someone can help me with this problem.

Thank you!

Answer 1

There's nothing you can do about the timing; if CustomError is raised before you type Control-C, then Action1 is at least going to begin. However, it looks like you want two try statements, one nested in the other:

try:
    try:
        raise CustomError
    except CustomError:
        Action1
except KeyboardInterrupt:
    Action2

This ensures that the keyboard interrupt will be caught and handled whether it happens while control is in the inner try clause or in the CustomError handler.