[Python-3000] PEP 3106: Revamping dict.keys(), .values() and .items() (original) (raw)

George Sakkis gsakkis at rutgers.edu
Sat Dec 23 17:01:16 CET 2006

On 12/23/06, Guido van Rossum <guido at python.org> wrote:

If I left your specific suggestion or question unaddressed or unanswered, please send it again (after re-reading the PEP, of course).

Shouldn't there be a motivation section ? If nothing else, it should discuss (or at least link to a previous discussion) why the original plan of using plain iterators was rejected. Iteration is probably the most common view operation by far, and it's trivial for the user to populate any other container if necessary. Is the complexity of adding three new types with non obvious semantics justified ? If so, some more compelling use cases would help; I don't think the shown example is really an improvement in readability or performance over for k, v in d.items(): ... for k, v in d.items(): ..

Regards, George

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