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Re: Dictionary sorting

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From Terry Reedy <tjreedy@udel.edu>
Subject Re: Dictionary sorting
Date Thu, 03 Nov 2011 17:36:25 -0400
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On 11/3/2011 2:46 PM, Scott Ware wrote:
> Python newbie here. So, when creating dictionaries, I am noticing
> that each time I print it out, that its not in the same order as when
> I typed it in. They seem to be getting sorted somehow.

No, the entries are not being sorted at all.

 > Is there a way to not sort them and leave the order as is?

CPython iterates (and prints) dict items in their arbitrary internal 
hash table order, which depends on the number and entry order of the 
items. It is a bug to depend on that arbitrary order in any way.

If you want to keep the dict sorted by entry order (as far as the user 
view goes), use collections.OrderedDict.

-- 
Terry Jan Reedy

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Thread

Dictionary sorting Scott Ware <scottdware@gmail.com> - 2011-11-03 11:46 -0700
  Re: Dictionary sorting John Gordon <gordon@panix.com> - 2011-11-03 18:57 +0000
    Re: Dictionary sorting Scott Ware <scottdware@gmail.com> - 2011-11-03 12:00 -0700
      Re: Dictionary sorting Chris Kaynor <ckaynor@zindagigames.com> - 2011-11-03 12:13 -0700
  Re: Dictionary sorting insomnia@gmail.com - 2011-11-03 13:01 -0700
  Re: Dictionary sorting Terry Reedy <tjreedy@udel.edu> - 2011-11-03 17:36 -0400
  Re: Dictionary sorting Tim Chase <python.list@tim.thechases.com> - 2011-11-03 18:01 -0500
    Re: Dictionary sorting Ben Finney <ben+python@benfinney.id.au> - 2011-11-04 11:06 +1100
      Re: Dictionary sorting Hrvoje Niksic <hniksic@xemacs.org> - 2011-11-04 11:20 +0100
        Re: Dictionary sorting Ben Finney <ben+python@benfinney.id.au> - 2011-11-04 23:19 +1100
  Re: Dictionary sorting Chris Angelico <rosuav@gmail.com> - 2011-11-04 10:59 +1100

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