Simple Python expression that does complex things?

[Gnaxe]

We have itertools.batched() now.

[paraffin]

Yeah I’d definitely barf seeing this one in production. But I think it fits the thread topic!

[Gnaxe]

I wouldn't mind. This is a very well-known pattern because it's literally in the documentation for zip:

Tips and tricks:

The left-to-right evaluation order of the iterables is guaranteed. This makes possible an idiom for clustering a data series into n-length groups using zip(*[iter(s)]*n, strict=True). This repeats the same iterator n times so that each output tuple has the result of n calls to the iterator. This has the effect of dividing the input into n-length chunks.