Python set() Function: Create Unique Collections

The set() function is used to create an unordered collection of unique elements, which can be done by passing an iterable object into the set. For example:

# 创建一个空的set
my_set = set()

# 创建一个带有初始元素的set
my_set = set([1, 2, 3])

# 创建一个带有重复元素的set，会自动去除重复元素
my_set = set([1, 2, 2, 3])

print(my_set)  # 输出结果为{1, 2, 3}

The set() function can also be used to remove duplicates from iterable objects such as lists.

my_list = [1, 2, 2, 3, 4, 4, 5]
unique_set = set(my_list)
print(unique_set)  # 输出结果为{1, 2, 3, 4, 5}