That code is invalid, because you're using "int(x)" as an assignment target. What would you expect it to do?

sorry:

    sum(int(x) > 3 for x in iterable)

That works better if you expect things in iterable that aren't ints, but it's still summing bools. int(x) > 3 returns a bool, so in the end it's still doing something similar to

  sum([True, False, False, True, True, False])

But if bools didn't implicitly behaves like ints, but could still be converted to ints, you could do this:

  sum(int(x > 3) for x in iterable)