Python set()函数的高级技巧

使用set()函数来去除重复元素

lst = [1, 2, 2, 3, 4, 4, 5]unique_set = set(lst)print(unique_set)

输出结果:

{1, 2, 3, 4, 5}

使用集合运算符进行交集、并集和差集操作

set1 = {1, 2, 3, 4, 5}set2 = {4, 5, 6, 7, 8}# 交集intersection = set1 & set2print(intersection)# 并集union = set1 | set2print(union)# 差集difference = set1 - set2print(difference)

输出结果:

{4, 5}{1, 2, 3, 4, 5, 6, 7, 8}{1, 2, 3}

使用set()函数来快速创建集合

s = set([1, 2, 3, 4, 5])print(s)

输出结果:

{1, 2, 3, 4, 5}

使用set()函数来检查两个集合是否相等

set1 = {1, 2, 3}set2 = {3, 2, 1}if set1 == set2:    print("The sets are equal")else:    print("The sets are not equal")

输出结果:

The sets are equal

使用set()函数来检查一个集合是否是另一个集合的子集或超集

set1 = {1, 2, 3}set2 = {1, 2, 3, 4, 5}if set1.issubset(set2):    print("set1 is a subset of set2")if set2.issuperset(set1):    print("set2 is a superset of set1")

输出结果:

set1 is a subset of set2set2 is a superset of set1