sometimes you might need to implement custom sorting logic according to specific requirements. In this article, we will walk through the process of sorting a list using a custom function in Python.
defcustom_sort(x,y):ifx>y:return-1ifx<y:return1return0printsorted([2,4,5,7,3],custom_sort) 在python3以后,sort方法和sorted函数中的cmp参数被取消,此时如果还需要使用自定义的比较函数,那么可以使用cmp_to_key函数。将老式的比较函数(comparison function)转化为关键字函数(key function)。与接受key fun...
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. 之于list.sort() 方法,我们只需记住 sorted() 的几个不同之处 它是一个内置函数,所以第一个参数传入待排序的集合 待排序的集合不受限于 list, 它是 it...
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. 相同点: sort 和 sorted 都有两个可选仅限关键字参数 key 和 reverse,都是默认升序排序。 不同点: 1.sort 是列表的一个方法,它的第一个参数是 self,...
④ sort() 方法的源码 源码如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 Help on built-infunctionsort:sort(*,key=None,reverse=False)methodofbuiltins.list instance Sort the listinascending order andreturnNone.The sort isin-place(i.e.the list itself is modified)andstable(i.e.the ...
1>>>help(sorted)2Help on built-infunction sortedinmodule builtins:34sorted(iterable, /, *, key=None, reverse=False)5Return a new list containing all itemsfromthe iterableinascending order.67A custom key function can be supplied to customize the sort order,andthe8reverse flag can be set ...
If a key function is given, apply it once to each list item and sort them, ascending or descending, according to their function values. The reverse flag can be set to sort in descending order. None 第二章:扩展功能 ① sort() 的 cmp 自定义排序方法 python2 中有cmp 参数,python3 中已经...
用built-in函数sorted进行排序(从2.4开始) 这两种方法使用起来差不多,以第一种为例进行讲解: 从Python2.4开始,sort方法有了三个可选的参数,Python Library Reference里是这样描述的 cmp:cmp specifies a custom comparison function of two arguments (iterable elements) which should return a negative, zero or ...
sorted函数接收参数为:1. 可迭代的列表 2. key function作为定制排序规则 3. 布尔变量reverse,设置为True则排序为降序-从大到小,默认设置为False即排序为升序-从小到大。返回值:如果未设置reverse参数,默认返回值为升序列表。 在python2里是之间传入cmp(compare)函数作为排序规则函数,python3里面把cmp函数wrap成了ke...
Acustomkeyfunctioncan be suppliedtocustomize the sortorder,andthe reverse flag can besettorequest the resultindescendingorder. AI代码助手复制代码 像操作列表一样,sorted()也可同样地用于元组和集合: >>> numbers_tuple = (6, 9, 3, 1)>>> numbers_set = {5, 5, 10, 1, 0}>>> numbers_tuple...