At 02:19 PM 6/15/2008 +0000, Antoine Pitrou wrote: > > Ordered dicts, dicts that remember the chronological order of their > > insertion, don't sound generally useful. > >They are generally useful in any case where you want to handle key-value >pairs while not confusing a human operator by messing up the original order. >Think e.g. configuration files. A common complaint against ConfigParser is >that writing a configuration file does not preserve the order of the original >file, which is harmless for the computer but very annoying for the human >being who maintains that file. You don't need an ordered dictionary for that; you need a save routine that stream-edits the old file contents. That way, you don't lose comments and spacing either. As for the other uses for ordered dictionaries, I find it simplest to just use a list of key,value pairs, and only transform it to a dictionary or dictionary-like structure as needed, using tools like the cgi module, the email package, or wsgiref.headers.
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