Summing Booleans For Fun And Profit

I came up with a IMHO nice piece of code while working with and getting to know Python.

incomplete_items = [
    item.quantity_ordered > item.quantity_delivered for item in order.items
]
if any(incomplete_items):
    do_something()

This feels clean and obvious. It might not be very efficient though. :/

has_incomplete_items = sum(
    item.quantity_ordered > item.quantity_delivered for item in order.items
)
if has_incomplete_items:
    do_something()

Doing it this way can be more efficient, since it can leverage generators and doesn’t need to go through the list again with

any

. But using 

sum

  over booleans feels hackish and non-obvious … 🙁

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