[Python-Dev] Informal educator feedback on PEP 572 (was Re: 2018 Python Language Summit coverage, last part) (original) (raw)

Greg Ewing greg.ewing at canterbury.ac.nz
Wed Jun 27 09:25:14 EDT 2018

Ivan Pozdeev via Python-Dev wrote:

Using this assigned result elsewhere in the same expression (akin to regex backreferences) is not a part of the basic idea actually.

If that's true, then the proposal has mutated into something that has no overlap whatsoever with the use case that started this whole discussion, which was about binding a temporary variable in a comprehension, for use within the comprehension.

It depends on the evaluation order (and whether something is evaluated at all),

Which to my mind is yet another reason not to like ":=".

-- Greg

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