Python Set Access: Retrieve Values Efficiently

In Python, you can retrieve the value of a collection using an index. Collections are unordered, so it is not possible to retrieve a value by index. However, you can loop through the collection to obtain the value of each element.示例如下：

my_set = {1, 2, 3, 4, 5}

# 使用循环来遍历集合并获取值
for value in my_set:
    print(value)

To access a specific value in a collection, you can use the “in” keyword to determine if that value is in the collection, as shown below:

my_set = {1, 2, 3, 4, 5}

# 判断集合中是否包含特定值
if 3 in my_set:
    print("3 存在于集合中")
else:
    print("3 不存在于集合中")