mylist.sort(key=sort_by_first_element)#对第一个元素进行排序print("排序后"':',end='')print(mylist)#调用__str__()mylist2= MyList([[1, 1, 0], [2, 0], [1, 2], [1, 1], [2, 0, 3]])#或者传入lambda匿名函数mylist2.sort(key=lambdae:e[1])#对第二个元素进行排序,相当于...
示例3:使用具有键功能的 sorted() 对列表进行排序 # take the second element for sortdeftake_second(elem):returnelem[1]# random listrandom = [(2,2), (3,4), (4,1), (1,3)]# sort list with key sorted_list = sorted(random, key=take_second) # print listprint('Sorted list:', sorted...
A custom key function can be supplied to customize the sort order, and the reverse flag can be set to request the result in descending order.You’ll cover the optional arguments key and reverse later in the tutorial.The first parameter of sorted() is an iterable. That means that you can...
(9,0)]sorted_tuples=sorted(tuples)# Example 3: Sort the list of tuples by first element descendingtuples=[(2500,'Hadoop'),(2200,'Spark'),(3000,'Python')]tuples.sort(key=lambdax:x[0],reverse=True)# Example 4: Sorted the list of tuples by first element descendingtuples=[(2500,...
c1 contains the first object in that tuple. 其中c2包含元组的第二个对象。 Where c2 contains the second object of the tuple. 我们还可以在FOR循环中使用元组,这非常方便。 We can also use tuples in FOR loops, which is extremely handy. 假设我创建了多个坐标。 Let’s say I’ve created multiple...
['xc','zb','yd','wa']## Write a little function that takes a string, and returns its last letter.## This will be the key function (takes in 1 value, returns 1 value).defMyFn(s):returns[-1]## Now pass key=MyFn to sorted() to sort by the last letter:print(sorted(strs,...
To effectively sort nested tuples, you can provide a custom sorting key using the key argument in the sorted() function.Here’s an example of sorting a list of tuples in ascending order by the second element in each tuple: my_list = [(1, 4), (3, 1), (2, 5)] sorted_list = ...
lst.sort(key = lambda x: x[1], reverse = True) 这样做会得到lst = [(6, 10), (5, 5), (7, 4), (0, 1), (3, 0.1), (1, 0), (4, 0), (2, -1)] 现在我不一定需要tuple(idx,value),它可以是两个单独的列表。最重要的部分是对值进行排序,同时还要知道列表lst中的“原始”索引...
蓝桥杯python青少组第十三届国赛试题 一、单选题（每题4分，共20分）1.运行以下代码，输出结果是（）。python a = [1, 2, 3, 4, 5]b = a[::1]a[0] = 10 print(b)A. [1, 2, 3, 4, 5] B. [5, 4, 3, 2, 1] C. [10, 2, 3, 4, 5] D. [5, 4, 3, 10, 1]答案：B ...
· sorted()和sort()函数用于对列表的值进行排序。sorted()具有返回类型,而sort()修改原始列表。 #Other functions for listnum_list = [1, 2, 3, 10, 20, 10]print(len(num_list)) #find length of listprint(num_list.index(10)) #find index of element that occurs firstprint(num_list.count(10...