The for statement works directly with sets, because they are iterable. A set is not a sequence, but it is like a sequence because we can iterate through the elements using a for statement.

Here we create three sets: even, odd and zero to reflect some standard outcomes in Roulette. The union of all three sets is the complete set of possible spins. We can iterate through this resulting set.

>>> even= set( range(2,38,2) )
>>> odd= set( range(1,37,2) )
>>> zero= set( (0,'00') )
>>> for n in even|odd|zero:
        print n