Set’s are special in that they cannot contain a duplicate of the same value, each value must be unique:
mySet = ()
Sets do not have an order.
You can convert other types of list into sets using the set function, lets say that we have a tuple which contains 5 objects, 2 of which are identical:
myTuple = ('foo', 'foo', 'spam', 22, False, True)
And we convert it to a set:
print set(myTuple)
Output: set([False, True, 'foo', 22])
Notice that a ‘foo’ has been removed, and there is no particular order.
