[Python-Dev] PEP czar for PEP 3144? (original) (raw)

Guido van Rossum guido at python.org
Mon Mar 19 20:55:11 CET 2012

On Mon, Mar 19, 2012 at 12:37 PM, Ethan Furman <ethan at stoneleaf.us> wrote:

Nick Coghlan wrote:

Collapsing the address list has to build the result list anyway to actually handle the deduplication part of its job, so returning a concrete list makes sense in that case. Having only one function return a list instead of an iterator seems questionable. Depending on the code it could either keep track of what it has returned so far in a set and avoid duplication that way; or, just return an iter(listobject) instead of listobject.

I know I'm lacking context, but is the list ever expected to be huge? If not, what's wrong with always returning a list?

-- --Guido van Rossum (python.org/~guido)

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