total_seconds clear solution for Lightbulb Intro by veky - python coding challenges

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total_seconds solution in Clear category for Lightbulb Intro by veky

import contextlib, datetime

def sum_light(els):
    """How long the light bulb has been turned on."""
    result, it = datetime.timedelta(), iter(els)
    with contextlib.suppress(StopIteration):
        while ...:
            start, end = next(it), next(it)
            result += end - start
    return result.total_seconds()

Nov. 14, 2020

Comments:

koborC on Feb. 18, 2021, 7:19 a.m.
Could you teach me why you used while ..., instead of while True?

leggewie on May 30, 2021, 1:45 p.m.
Linking in the docs for <a href="https://docs.python.org/3/library/contextlib.html#contextlib.suppress">contextlib.suppress</a>. I'll take the bait and ask if there is any deeper meaning in the use of the ellipsis ... in line 7, except that it's truthy and bool(...) == True?

veky on May 30, 2021, 2:31 p.m.
Deeper... well, it's nicer. :-) And the reading of "while true" always struck me as something missing, "while what is true?". Ellipsis in my view nicely confers the meaning of "don't look here for the stopping condition; it will become clear later".

Master of the Time Stone

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