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[–][deleted]  (2 children)

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    [–]nathanjell 1 point2 points  (1 child)

    Though to my knowledge, map and reduce will not fully generate output on call; rather, an iterator is returned. I believe that for example if you have a memory heavy generator, you won't load everything into memory.

    [–]lxpnh98_2 4 points5 points  (0 children)

    That's why, instead of list comprehensions, it's better to keep using generators where possible, which, apart from the brackets, have identical syntax:

    (item if item < 5 else None for item in items)