[Python-Dev] Tricky way of of creating a generator via a comprehension expression (original) (raw)
Paul Moore p.f.moore at gmail.com
Wed Nov 22 10:53:27 EST 2017
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On 22 November 2017 at 15:10, Ivan Levkivskyi <levkivskyi at gmail.com> wrote:
I think there may be a small misunderstanding here. The situation is different for comprehensions and generator expressions, let me summarize the current state: [...] What do you think?
Can you point me to where in the docs it explains the semantic difference between a generaor expression and a list comprehension? Ignoring the trivial point that they return different values - think of [a for a in expr] vs list(a for a in expr) if you like - these should be semantically the same, I believe?
TBH, the docs aren't super-precise in this area. Before we start debating the "correct" behaviour of edge cases, I think we need to agree (and document) the semantics more precisely.
Paul
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