The Python sorted() function accepts three parameters, all of which are optional −iterObject − It represents an object such as a list, string, or tuple. key − It specifies a function representing a comparison key. reverse − This parameter specifies the sorting order. If its value ...
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. 1. 2. 3. 4. 5. 6. 7. 8. 9. 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={5,5,1...
To sort a string or tuple, you can simply pass it to the sorted() function as well: text = "python" sorted_text = sorted(text) print(sorted_text) # Output: ['h', 'n', 'o', 'p', 't', 'y'] For descending order sorting, use the reverse=True argument with the sorted() ...
>>># Python3>>>help(sorted)Help on built-infunctionsortedinmodule builtins:sorted(iterable,/,*,key=None,reverse=False)Return anewlistcontaining all items from the iterableinascending order.Acustom keyfunctioncan be supplied to customize the sort order,and the reverse flag can besetto request t...
自从Python 2.4之后,list.sort()和sorted()都添加了一个key参数用来指定一个函数,这个函数作用于每个list元素,在做cmp之前调用。key参数是一个函数,这个函数有一个参数,返回一个用来排序的关键字。这种排序方法很快,因为key方法在每个输入的record上只执行一次。你可以使用Python内置的函数(len, str.lower)或者自定义...
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. 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) ...
1 python2中的sort和sorted 1.1 sort()函数 sort函数的定义如下: sort(self, cmp=None, key=None, reverse=False) self:表示list自身 cmp:自定的比较函数 key:指定元素在比较之前要调用的函数,并且这个函数接受一个参数,返回一个作为排序依据的key。
def mycmp(a, b): # defining compare function if a[1] > b[1]: return 1 elif a[1] < b[1]: return -1 else: return 0Then, we use the sorted() function with the key parameter set as follows to specify the comparator via the cmp_to_key() function....
如果有多个最大元素,则此函数将返回第一个找到的。这和其他稳定排序工具如 sorted(iterable, key=keyfunc, reverse=True)[0] 和 heapq.nlargest(1, iterable, key=keyfunc) 保持一致。# 返回最大值 a = 11 b = 12 c = 13 print(max(a, b, c)) # 13 # 如果只提供了一个位置参数,它必须是非空...
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.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_...