What does set mean in python

The set() function creates an unordered set of non-repeating elements, which can perform relationship testing, delete duplicate data, and calculate intersection, difference, union, etc.

set Syntax:

class set([iterable])

Parameter description:

iterable -- iterable object object ;

Return value: Return a new collection object.

The following examples show how to use set:

>>>x = set('runoob')
>>> y = set('google')
>>> x, y
(set(['b', 'r', 'u', 'o', 'n']), set(['e', 'o', 'g', 'l']))   # 重复的被删除
>>> x & y         # 交集
set(['o'])
>>> x | y         # 并集
set(['b', 'e', 'g', 'l', 'o', 'n', 'r', 'u'])
>>> x - y         # 差集
set(['r', 'b', 'u', 'n'])
>>>

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