See the thread from earlier today, this list (python-list@python.org).
"newbie: dictionary - howto get key value"
On Thursday 10 March 2005 06:26 pm, Sandman wrote:
> Hi there,
> I'm still a bit new to Python, and had a question.
> I have a dictionary that looks like:
> PWD = \
> {
> "root": 0,
> "joe": 200,
> "susan": 201,
> ..
> }
>
> In other words, the values are unique as well as the keys. I've run
> into a situation where I need to lookup the item by value. So given
> 201, I need to say the key is really susan.
>
> Is there a way to do this that does not traverse the entire dictionary
> multiple times?
>
> Thanks.
--
James Stroud, Ph.D.
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095
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