Python: Sort List by the Second Element L = [('b',2),('a',1),('c',3),('d',4)] L.sort(key=lambdax:x[1])
2 of the tuples have3as the second element, and since we set thereverseargument toTrue, the tuple with the greater 3rd element gets moved to the front. The last tuple in the list is the one with the lowest second element. #Sort a list of tuples by multiple elements using operator.it...
You can sort a list of lists in descending order by the second element by using the reverse parameter of thesorted()function to specify the index to sort by using thekeyparameter. For example, the reverse parameter is set toTrueto sort the list in descending order, and thekeyparameter is ...
By providing an anonymous function which returns the second element of the tuple, we sort the tuples by their second values. $ ./sort_elem_idx.py [(-1, 3), (0, -2), (1, 1), (3, 5), (4, 0)] [(0, -2), (4, 0), (1, 1), (-1, 3), (3, 5)] Python sort lis...
how can you sort a list of tuples by the second element? The key parameter will again come to the rescue. We can define our custom sort by defining our own key function. defcustom_sort(t):returnt[1]L=[("Alice",25),("Bob",20),("Alex",5)]L.sort(key=custom_sort)print(L)# ou...
Python provides us with some built-in sorting methods. While using the sorting methods, we need to pass a method to the method which will swap the element to the second element of tuple. Program 1: Using sort() method # Python program to sort a list of tuples by second item# Creating...
self.mylist[j], self.mylist[j+ 1] = self.mylist[j + 1], self.mylist[j]#python的语法支持这种交换exceptException as e:print(e)print("可能是索引越界了") def__str__(self):returnstr(self.mylist)defsort_by_first_element(lst):returnlst[0]defsort_by_second_element(lst):returnlst[1...
# Example 4: Sorted the list of tuples by first element descending tuples = [(2500, 'Hadoop'), (2200, 'Spark'), (3000, 'Python')] sorted_tuples = sorted(tuples, key=lambda x: x[0], reverse=True) # Example 5: Sorted the list of tuples by second element ...
# take second element forsortdeftakeSecond(elem):returnelem[1]# random listrandom = [(2,2), (3,4), (4,1), (1,3)]#sortlist with keyrandom.sort(key=takeSecond)# print listprint('Sorted list:', random) 输出 Sorted list: [(4, 1), (2, 2), (1, 3), (3, 4)] ...
self.mylist[j], self.mylist[j+ 1] = self.mylist[j + 1], self.mylist[j]#python的语法支持这种交换exceptException as e:print(e)print("可能是索引越界了")def__str__(self):returnstr(self.mylist)defsort_by_first_element(lst):returnlst[0]defsort_by_second_element(lst):returnlst[1]...