Multiples-keys dictionary where key order doesn't matter : <p>I am trying to create a dictionary with two strings as a key and I want the keys to be in whatever order.</p>

<pre><code>myDict[('A', 'B')] = 'something'
myDict[('B', 'A')] = 'something else'
print(myDict[('A', 'B')])
</code></pre>

<p>I want this piece of code to print 'something else'. Unfortunately, it seems that the ordering matters with tuples. What would be the best data structure to use as the key?</p>
