在Python中,set只允许可哈希的(immutable)对象,像整数、浮点数、字符串和元组都可以。列表是可变的(mutable),因此分享不到set中。让我们先来验证这一点。 # 创建一个列表my_list=[1,2,3]# 创建一个集合my_set=set()# 尝试将列表添加到集合中try:my_set.add(my_list)exceptTypeE
Set 集合的特性 set 是由不可变 immutable 且唯一 unique 的元素组合成的一个可变 mutable 的无序集合。 set 中的 item 是不可变的 immutable( 即可哈希 hashable) set 中不能有 list 类型的 object,因为 list 是 mutable,不可 hash。 所以set 中的 item 只能为 int, float, str, tuple set_obj = {1,...
Example: s = {1, 2, 3, 2} will result in s = {1, 2, 3}. Unordered: Sets do not record element positions. Therefore, you cannot index sets, slice them, or perform other sequence operations. Mutable: Unlike frozensets, which are immutable, sets are mutable. This means you can add...
In Python programming, a set is an unordered collection of unique elements. Sets are mutable, but the elements inside a set must be immutable and hashable. We use sets for operations like membership testing, deduplication, and set-based mathematical operations like union, intersection, and differen...
Set elements are immutable but the set itself is a mutable object, so in order to make an immutable set, we use the concept offrozenset. The frozen set returns an immutable version of a Python set object. We can modify the elements of a set at any time by adding or deleting elements,...
typing.AbstractSet和typing.MutableSet是ABC（抽象基类）的类型，而不是set类型的具体实现：set类型是可变...
The Python TypeError: unhashable type: 'set' occurs when we use a `set` as a key in a dictionary or an element in another `set`.
In Python, sets are mutable, which means you can modify them after they have been created. While the elements within a set must be immutable (such as integers, strings, or tuples), the set itself can be modified.You can add items to a set using various methods, such as add(), ...
A Python set is the collection of the unordered items. Each element in the set must be unique, immutable, and the sets remove the duplicate elements. Sets are mutable which means we can modify it after its creation. Unlike other collections in Python, there is no index attached to the ele...
Sets themselves are mutable too, and so cannot be nested in other sets directly. 1 集合中的元素是唯一的,即集合中不能可找到两个相同的元素。 集合中的元素是 immutable ( 不可变的),因此: 可以用作集合元素的数据类型: int , float, str, bool ,tuple ...