Re: Pythonic way to iterate through multidimensional space?

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From	Peter Otten <__peter__@web.de>
Subject	Re: Pythonic way to iterate through multidimensional space?
Date	Wed, 06 Aug 2014 09:39:42 +0200
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Gayathri J wrote:

> Dear Peter
> 
> Below is the code I tried to check if itertools.product() was faster than
> normal nested loops...
> 
> they arent! arent they supposed to be...

I wouldn't have expected product() to be significantly faster, but neither 
did I expect it to be slower.

> or am i making a mistake? any
> idea?

For your testcase you can shave off a small amount by avoiding the tuple-
unpacking

for t in product(...):
    f[t] = 0.0

but that may be cheating, and the effect isn't big.

When you are working with numpy there may be specialised approaches, but

    f[:,:,:] = 0.0

is definitely cheating I suppose...

Thread

Pythonic way to iterate through multidimensional space? Frank Miles <fpm@u.washington.edu> - 2014-08-05 20:06 +0000
  Re: Pythonic way to iterate through multidimensional space? Peter Otten <__peter__@web.de> - 2014-08-05 22:48 +0200
  Re: Pythonic way to iterate through multidimensional space? Frank Miles <fpm@u.washington.edu> - 2014-08-05 20:57 +0000
    Re: Pythonic way to iterate through multidimensional space? Gayathri J <usethisid2014@gmail.com> - 2014-08-06 11:04 +0530
    Re: Pythonic way to iterate through multidimensional space? Chris Angelico <rosuav@gmail.com> - 2014-08-06 16:25 +1000
    Re: Pythonic way to iterate through multidimensional space? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-08-06 08:33 +0100
    Re: Pythonic way to iterate through multidimensional space? Peter Otten <__peter__@web.de> - 2014-08-06 09:39 +0200
    Re: Pythonic way to iterate through multidimensional space? Tim Chase <python.list@tim.thechases.com> - 2014-08-06 06:39 -0500
  Re: Pythonic way to iterate through multidimensional space? Wojciech Giel <wojtekgiel@gmail.com> - 2014-08-06 09:04 +0100
  Re: Pythonic way to iterate through multidimensional space? Gayathri J <usethisid2014@gmail.com> - 2014-08-06 17:43 +0530
  Re: Pythonic way to iterate through multidimensional space? Peter Otten <__peter__@web.de> - 2014-08-06 14:39 +0200
  Re: Pythonic way to iterate through multidimensional space? Gayathri J <usethisid2014@gmail.com> - 2014-08-06 18:57 +0530

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