The sets Module

(New in 2.3) A set datatype, based on dictionaries. Supports the usual set operations (intersection, union, membership tests, etc).

In Python 2.4 and later, the set datatype is a built-in. To write code that works for 2.3 and later, you can do:

try:
    set
except NameError:
    from sets import Set as set

 

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