def main():

    list1=[1,1,2,2,3,3]

    print(list1)

    set1={1,1,2,2,3,3}

    print(set1)

    set1.add(4)

    set1.add(5)

    print(set1)

    set2={1,3,5,7,9}

    print(set2)

    set3=set1 & set2

    #set3=set1.intersection(set2)

    print(set3)

    set3=set1 | set2

    #st3=set1.union(set2)

    print(set3)

    set3=set1-set2

    #set3=set1.difference(set2)

    print(set3)

    set3 = set2.difference(set1)

    print(set3)

    set3=set1 ^ set2

    #set3=set1.symmetric_difference(set2)

    print(set3)

    for val in set2:

        print(val)

    print(set2.pop())

    if 3 in set2:

        set2.remove(3)

    print(set2)

    print(set2<=set1)

    #print(set2.issubset(set1))

    print(set1>=set2)

    #print(set1.issuperset(set2))

if __name__ == '__main__':

    main()

结果：

[1, 1, 2, 2, 3, 3]

{1, 2, 3}

{1, 2, 3, 4, 5}

{1, 3, 5, 7, 9}

{1, 3, 5}

{1, 2, 3, 4, 5, 7, 9}

{2, 4}

{9, 7}

{2, 4, 7, 9}

1

3

5

7

9

1

{5, 7, 9}

False

False