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| Date | Mon, 25 Jul 2011 15:46:22 +1000 |
| Subject | Re: Convert '165.0' to int |
| From | Chris Angelico <rosuav@gmail.com> |
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On Mon, Jul 25, 2011 at 10:07 AM, Billy Mays <noway@nohow.com> wrote: > if the goal is speed, then you should use generator expressions: > > list_of_integers = (int(float(s)) for s in list_of_strings) Clarification: This is faster if and only if you don't actually need it as a list. In spite of the variable name, it's NOT a list, and you can't index it (eg you can't work with list_of_integers[7]). However, you can iterate over it to work with the integers in sequence, and for that specific (and very common) use, it will be faster and use less memory than actually creating the list. It's also going to be a LOT faster than creating the list, if you only need a few from the beginning of it; the generator evaluates lazily. Personally, I'd just create a tiny function and use that, as has been suggested. ChrisA
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Convert '165.0' to int "Frank Millman" <frank@chagford.com> - 2011-07-21 11:31 +0200
Re: Convert '165.0' to int SigmundV <sigmundv@gmail.com> - 2011-07-24 11:27 -0700
Re: Convert '165.0' to int Billy Mays <noway@nohow.com> - 2011-07-24 20:07 -0400
Re: Convert '165.0' to int Chris Angelico <rosuav@gmail.com> - 2011-07-25 15:46 +1000
Re: Convert '165.0' to int Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-07-25 19:48 +1000
Re: Convert '165.0' to int SigmundV <sigmundv@gmail.com> - 2011-07-25 09:39 -0700
Re: Convert '165.0' to int Billy Mays <81282ed9a88799d21e77957df2d84bd6514d9af6@myhashismyemail.com> - 2011-07-25 13:11 -0400
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