[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
Sun Jul 1 02:03:31 EDT 2018

Nick Coghlan wrote:

That's a performance argument, not a readability one (as if you don't care about performance, you can just repeat the subexpression).

Repeated subexpressions can be a readability issue too, since you have to examine them to notice they are actually the same. They also provide an opportunity to make the error of not making them the same when they should be, and add the maintenance burden of ensuring they stay the same when changes are made.

-- Greg

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