print("错误:", e) # 输出: 错误: 'frozenset' object has no attribute 'add' 2.2 成员测试: in & not in frozenset支持快速的成员测试,这对于判断一个元素是否存在于集合中非常有用。 # 成员测试 print(2 in my_frozenset) # 输出: True print(4 not in my_frozenset) # 输出: True 2.3 集合运算...
In every other way it is like a set. And because it cannot be changed, it can be used as a dictionary key. A simple example. Here is an example that uses the frozenset keyword. We create an immutable set of strings (bird, plant and fish). Tip A frozenset can be used where a ...
File "<string>, line 8, in <module> fSet.add('v') AttributeError: 'frozenset' object has no attribute 'add' Example 2: frozenset() for Dictionary When you use a dictionary as an iterable for a frozen set, it only takes keys of the dictionary to create the set. # random dictionaryp...
Sets and frozensets in Python are powerful data structures used for storing unique elements. While sets are mutable, frozensets are immutable. This tutorial will explore these data structures through practical examples with descriptions and explanations, focusing on their use-cases and functionality. In...
In this example, we use the frozenset() function to process the tuple "my_tuple", removing duplicate elements. The resulting frozenset is immutable −Open Compiler my_tuple = (1, 2, 3, 3) frozen_set = frozenset(my_tuple) print('The frozenset object obtained is:',frozen_set) ...
python笔记—集合的一些知识 集合的创建 set1 = {1,2,3,4,5},注意,集合中重复的元素会被自动剔除。 集合是无序的,不支持索引。 可以利用工厂函数set()来创建一个集合:set2 = set([1,2,3,4,5]) 如何访问集合中的值: for语句进行遍历;in/not in 判断是否在集合中;add()添加;remove()移除 不可变...
You can create a frozenset in Python by passing an iterable (e.g. list, tuple, set) to the built-in frozenset() function. For example, my_frozenset = frozenset([1, 2, 3]).You may also like:How to Create an immutable Set in Python ...
❮ Built-in Functions ExampleGet your own Python Server Freeze the list, and make it unchangeable: mylist = ['apple', 'banana', 'cherry']x = frozenset(mylist) Try it Yourself » Definition and UsageThe frozenset() function returns an unchangeable frozenset object (which is like a ...
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The class sphinx directive is used (see it's docs), but wrongly: cpython/Doc/library/stdtypes.rst Lines 4251 to 4258 in 6313cdd .. class:: set([iterable]) frozenset([iterable]) Return a new set or frozenset object whose elements are take...