[Python-Dev] Informal educator feedback on PEP 572 (was Re: 2018 Python Language Summit coverage, last part) (original) (raw)
Antoine Pitrou solipsis at pitrou.net
Wed Jun 27 09:41:23 EDT 2018
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Why is this discussion talking about comprehensions at all? Is there a decent use case for using assignments in comprehensions (as opposed to language lawyering or deliberate obfuscation)?
Regards
Antoine.
On Thu, 28 Jun 2018 01:25:14 +1200 Greg Ewing <greg.ewing at canterbury.ac.nz> wrote:
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 ":=".
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