"Chorn, Guillaume" <guillaume_ch...@merck.com> wrote
dictionary, but can I look up the key associated with a particular
value?
Not directly but its not hard to do bearing in mind you will
get a collection back.:
d = {1:10,2:20,3:10,4:20}
val = 10
ks = [k for k in d if d[k] == val]
ks
[1, 3]
You need to trawl the dictionary whatever you do
(unless you get very sophisticated and build a double
dictionary class, but then insertions get slow because
you have to update both versions...)
HTH,
--
Alan Gauld
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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