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copied!<p>Personally, one of the things I love about python is the tuple-dict combination. What you have here is effectively a 2d array (where x = fruit name and y = color), and I am generally a supporter of the dict of tuples for implementing 2d arrays, at least when something like <code>numpy</code> or a database isn't more appropriate. So in short, I think you've got a good approach.</p> <p>Note that you can't use dicts as keys in a dict without doing some extra work, so that's not a very good solution. </p> <p>That said, you should also consider <a href="http://docs.python.org/dev/library/collections.html#collections.namedtuple" rel="noreferrer">namedtuple()</a>. That way you could do this:</p> <pre><code>>>> from collections import namedtuple >>> Fruit = namedtuple("Fruit", ["name", "color"]) >>> f = Fruit(name="banana", color="red") >>> print f Fruit(name='banana', color='red') >>> f.name 'banana' >>> f.color 'red' </code></pre> <p>Now you can use your fruitcount dict:</p> <pre><code>>>> fruitcount = {Fruit("banana", "red"):5} >>> fruitcount[f] 5 </code></pre> <p>Other tricks:</p> <pre><code>>>> fruits = fruitcount.keys() >>> fruits.sort() >>> print fruits [Fruit(name='apple', color='green'), Fruit(name='apple', color='red'), Fruit(name='banana', color='blue'), Fruit(name='strawberry', color='blue')] >>> fruits.sort(key=lambda x:x.color) >>> print fruits [Fruit(name='banana', color='blue'), Fruit(name='strawberry', color='blue'), Fruit(name='apple', color='green'), Fruit(name='apple', color='red')] </code></pre> <p>Echoing chmullig, to get a list of all colors of one fruit, you would have to filter the keys, i.e. </p> <pre><code>bananas = [fruit for fruit in fruits if fruit.name=='banana'] </code></pre>

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