[dr_zoidberg]

In my work we have code in many places along the lines of:

    data = expensive_function(blah, blah_blah)
    if data:
        # many lines of processing
        data = expensive_function(blah, blah_bah)

And seen a lot of times where newcomers forget the assingment at the end that makes everything move. So yeah, the walrus version would be a lot simpler:

    while data := expensive_function(blah, blah_blah):
        # process data

This is just one of the "edge cases" where the walrus makes sense.