fromoperatorimportitemgetterdefsort_tuples(sub_li):# itemgetter(1) returns a function that can be used to retrieve the# second element of a tuple (i.e., the element at index 1)# this function is used as the key for sorting the sublistsreturnsorted(sub_li,key=itemgetter(1))# Input li...
sorted_tuples = sorted(tuples, key=lambda x: x[0], reverse=True) # Example 5: Sorted the list of tuples by second element tuples = [(2500, 'Hadoop'), (2200, 'Spark'), (3000, 'Python')] sorted_list = sorted(tuples, key=lambda x: x[1]) # Example 6: Sort the list of ...
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...
The built-insorted()function is guaranteed to bestable. A sort is stable if it guarantees not to change the relative order of elements that compare equal — this is helpful for sorting in multiple passes (for example, sort by department, then by salary grade). 算法的稳定性,基数排序正确性...
调用sort() 函数: [[3 7] [1 9]] 按列排序: [[3 1] [9 7]] 我们的数组是: [(b'raju', 21) (b'anil', 25) (b'ravi', 17) (b'amar', 27)] 按name 排序: [(b'amar', 27) (b'anil', 25) (b'raju', 21) (b'ravi', 17)] ...
Use the `key` argument of the `sorted()` function to sort a list of tuples by the second element.
def find_first_element(tuples, second_value): for first, second in tuples: if second == second_value: return first return None # Return None if the second value is not found # create the tuple list my_tuples = [("amar", 3), ("akbar", 2), ("anthony", 31)] second_value = ...
Here, thesort()method directly sorts theproductslist by the first element of each tuple. You can see the output in the screenshot below: Method 3: Using itemgetter from operator Module Theitemgetterfunction from theoperatormodule can also be used to sort a list of tuples in Python. This me...
['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,...
The idea is that you want to sort the first component of the tuple in a different order as the second component. A simple transformation to take this into account is to set the sorting key to (-x[0],x[1]). Share Improve this answer Follow edited Jan 15, 2017 at 16:02 answered...