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| Date | Thu, 25 Jul 2013 03:58:55 +1000 |
| Subject | Re: Python 3: dict & dict.keys() |
| From | Chris Angelico <rosuav@gmail.com> |
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On Thu, Jul 25, 2013 at 3:17 AM, Terry Reedy <tjreedy@udel.edu> wrote: > On 7/24/2013 12:34 PM, Chris Angelico wrote: > >> Side point: Why is iterating over a dict equivalent to .keys() rather >> than .items()? It feels odd that, with both options viable, the >> implicit version iterates over half the dict instead of all of it. >> Obviously it can't be changed now, even if .items() were the better >> choice, but I'm curious as to the reason for the decision. > > This is > coupled with the fact that the default meaning of 'item in collection' is > that iterating over 'collection' eventually produces 'item' or a value equal > to 'item'. Ahh, that makes sense. I never thought of iteration and 'in' being connected like that, but yes, that's a solid reason for doing it that way. ChrisA
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Re: Python 3: dict & dict.keys() Chris Angelico <rosuav@gmail.com> - 2013-07-25 03:58 +1000
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