set函数在python中的常见用法

empty_set = set()

numbers = [1, 2, 3, 4, 5]
number_set = set(numbers)
print(number_set)  # 输出：{1, 2, 3, 4, 5}

duplicates = [1, 2, 2, 3, 4, 4, 5]
unique_elements = set(duplicates)
print(list(unique_elements))  # 输出：[1, 2, 3, 4, 5]

set1 = {1, 2, 3}
set2 = {1, 2, 3}
print(set1 == set2)  # 输出：True

subset = {1, 2}
superset = {1, 2, 3, 4, 5}
print(subset.issubset(superset))  # 输出：True

subset = {1, 2}
superset = {1, 2, 3, 4, 5}
print(superset.issuperset(subset))  # 输出：True

set1 = {1, 2, 3}
set2 = {3, 4, 5}
union_set = set1.union(set2)
print(union_set)  # 输出：{1, 2, 3, 4, 5}

set1 = {1, 2, 3}
set2 = {2, 3, 4}
intersection_set = set1.intersection(set2)
print(intersection_set)  # 输出：{2, 3}

set1 = {1, 2, 3}
set2 = {2, 3, 4}
difference_set = set1.difference(set2)
print(difference_set)  # 输出：{1}

set1 = {1, 2, 3}
set2 = {2, 3, 4}
symmetric_difference_set = set1.symmetric_difference(set2)
print(symmetric_difference_set)  # 输出：{1, 4}