The List Completion Is the Most Readable of the Three Methods

The list comprehension is actually the most readable of the three, i think. It doesn't end up with a weird programming model where you have a list its length is one thing, but that's not what you should actually work with. So how much memories are being used by the three methods? The other thing that would be interest to see is a to throw numpie in the mix,. because i know numpie has some more efficient, i mean, i say, wa, a completely different beast. But still, you work as homogeneous data that's numbers or something, or strangs. You have to worry about these little details. What do you think about this?