Multikey dictionary

[Mark McEahern]

> What datatypes can one use as key in a dictionary?

Look here for __hash__--that might help:

  http://www.python.org/doc/current/ref/customization.html

> Can I use for example two longs as key (kind of a double key)?

If you want to keep it simple, why not just use a tuple?

  d = {}
  d[(1,2)] = "foo"

// mark
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