Python基础之reduce函数

轻松学Python 发布时间：2022-08-19 19:16:40 ，浏览量：0

哈喽大家好，今天说一下reduce函数的使用方法，以及与for循环的对比。

reduce函数原本在python2中也是个内置函数，不过在python3中被移到functools模块中。

reduce函数先从列表（或序列）中取出2个元素执行指定函数，并将输出结果与第3个元素传入函数，输出结果再与第4个元素传入函数，…，以此类推，直到列表每个元素都取完。

reduce用法

对列表元素求和，如果不用reduce，我们一般常用的方法是for循环：

def sum_func(arr):
    if len(arr)


    
        
        
        
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