3 print('set_obj: {}'.format(set_obj)) 4 print('tuple_set_obj: {}'.format(tuple_set_obj)) ---> 5 list_set_obj = {[1,2,3]} 6 print('list_set_obj: {}'.format(list_set_obj)) TypeError: unhashable type: 'list' 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13...
在Python set是基本数据类型的一种集合类型,它有可变集合(set())和不可变集合(frozenset)两种。 创建集合set、集合set添加、集合删除、交集、并集、差集的操作都是非常实用的方法。 set 是一个无序的元素集合,支持并、交、差及对称差等数学运算, 但由于 set 不记录元素位置,因此不支持索引、分片等类序列的操作。
s = set(["gouguoqi","gouguoqi","sb"]) s.clear()print(s) C:\python35\python3.exe D:/pyproject/day12列表/set-集合.py set() 3. copy(self, *args, **kwargs) Return a shallow copy of a set shallow [ˈʃæləʊ] 浅 浅拷贝一个集合 s = set(["gouguoqi","gouguoqi",...
24defdifference(self, *args, **kwargs):#real signature unknown25"""26 Return the difference of two or more sets as a new set. 27 28 (i.e. all elements that are in this set but not the others.) 29"""30pass31 32defdifference_update(self, *args, **kwargs):#real signature unknow...
some_set = {1, 1, 2, 2, 3, 4} # some_set is now set当中的元素也必须是不可变对象,因此list不能传入set。 # Similar to keys of a dictionary, elements of a set have to be immutable. invalid_set = {[1], 1} # => Raises a TypeError: unhashable type: 'list' ...
| Return the difference of two or more sets as a new set. | | (i.e. all elements that are in this set but not the others.) | | intersection(...) | Return the intersection of two sets as a new set. | | (i.e. all elements that are in both sets.) | | isdisjoint(...)...
invalid_set = {[1], 1} # => Raises a TypeError: unhashable type: 'list' valid_set = {(1,), 1} 可以调用add方法为set插入元素: # Add one more item to the set filled_set = some_set filled_set.add(5) # filled_set is now {1, 2, 3, 4, 5} # Sets do not have duplicate...
Okay, so why did changing the order affect the length of the generated set object? The answer is the lack of intransitive equality only. Since sets are "unordered" collections of unique elements, the order in which elements are inserted shouldn't matter. But in this case, it does matter....
set() -> new empty set object 通过上面的例子,可见set类型数据和dict类型一样也是使用{}来标识,但是需要注意的是:dict类型可以使用dic = {}来创建一个空字典,set类型却不能,只能通过s = set()来创建。 In [15]: s = set() In [16]: s Out[16]: set() In [17]: d = {} In [18...
集合是一种组合型的数据类型,分为可变的set和不可变的frozenset。 前言 集合是一种组合型的数据类型,分为可变的set和不可变的frozenset。 软件环境 系统 UbuntuKylin 14.04 软件 Python 2.7.3 IPython 4.0.0 可变集合Set 集合set是一种无序的、唯一的的元素集,与数学中集合的概念类似,可对其进行交、并、差、补...