When can you Interrupt a While Loop with a Keystroke and How?

Interrupting a While Loop with a Keystroke

The scenario involves a while loop used for reading serial data and writing to a CSV file. The user wants to be able to interrupt the loop prematurely upon obtaining sufficient data. While approaches exist using external libraries like OpenCV, the discussion focuses on techniques within the loop's code itself.

To allow user interruption, one solution involves raising a KeyboardInterrupt exception. By enclosing the loop in a try block and handling the exception outside the loop (e.g., with a pass statement), the program can continue execution after the interruption. Here's an example:

<code class="python">try:
    while True:
        do_something()
except KeyboardInterrupt:
    pass</code>

This approach provides a clean way to break out of the loop when the user presses Ctrl-C, a standard way to generate a KeyboardInterrupt. The script can then seamlessly continue with its execution.

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