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0 pointskdmccormick2y ago0 comments

You are right, the article is wrong. It is most certainly not lazy. f(g(), h()) will always call both h and g regardless of whether f uses their results.

Iteration in a sense can be "lazy", but that laziness is via data structures built on top of a strict core language. Python is not alone in having lazy iteratable data structures, but it leans into them relatively hard in its standard library.

Many of us love this, as it lets for loops work elegantly over all sorts of abstractions, but I could see some folks disliking it. Still, the author does not explain this nuance, which makes me think he does not quite know what he is talking about.

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the_af2y ago

Almost every mainstream language has a way to "lazily" (in the sense you mean) iterate over lists, so this can't be what the author was singling out. I think he's just confused.

anonzzzies2y ago

But that's just libraries though. A language that actually evaluates outer to inner is different. And yes, indeed confused I would say.

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