On Wed, Jul 28, 2010 at 11:11 PM, Chris Rebert <c...@rebertia.com> wrote:
> On Wed, Jul 28, 2010 at 8:12 PM, Navkirat Singh <navkir...@gmail.com> > wrote: > > Sorry, I might have been a bit vague: > > (Also, I am new to pythong) > > I am trying to do construct my own web session tracking algorithm for a > web > > server (which also I have constructed). The book keeping is for the > session > > information I track. The dictionary object will do this for me. I was > > initially using a plain dictionary object, but I read this in the > > documentation that made me think about the question I asked :- > > Does your program actually make use of the ordering? If so, then yes, > using OrderedDict is obviously preferable (Why reimplement something > needlessly?). If not, then why bother with the extra complication? > > (You are aware that the "ordered" in OrderedDict means that its keys > are ordered, and not that, say, a list containing OrderedDicts can be > sorted, right?) Actually, a collections.OrderedDict saves things not in key order, but in chronological order: $ /usr/local/python27/bin/python Python 2.7rc1 (r27rc1:81772, Jun 10 2010, 14:28:26) [GCC 4.4.1] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import collections >>> d = collections.OrderedDict() >>> d OrderedDict() >>> d[5] = 'a' >>> d[3] = 'b' >>> d[8] = 'c' >>> print d.keys() [5, 3, 8] >>> If you want things saved in key order, you might try my treap or duptreap module: http://stromberg.dnsalias.org/~dstromberg/treap/
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