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zungmou
V2EX    Python

Python 遍历一个数组并计算最终结果

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  •   zungmou 2016-11-10 10:26:24 +08:00 3761 次点击
    这是一个创建于 3260 天前的主题,其中的信息可能已经有所发展或是发生改变。
    我有一段代码,如下:
    result = 0
    for item in [3, 2, 5]:
    result ^= item
    print(result)
    以上这个 for 循环能不能用一个函数,或一个语句就计算出来?
    11 条回复    2016-11-10 14:38:29 +08:00
    Pythagodzilla
        1
    Pythagodzilla  
       2016-11-10 10:32:45 +08:00
    print result*reduce(operator.mul, [3,2,5])
    这样?
    littleshy
        2
    littleshy  
       2016-11-10 10:36:10 +08:00   1
    reduce(operator.ixor,[3,2,5])
    woostundy
        3
    woostundy  
       2016-11-10 10:39:25 +08:00
    l = [3,2,5]
    reduce(lambda x,y:x^y,l)
    woostundy
        4
    woostundy  
       2016-11-10 10:40:10 +08:00
    好尴尬,刚发出来刷新发现上面有更好的写法
    zungmou
        5
    zungmou  
    OP
       2016-11-10 10:43:41 +08:00
    @Pythagodzilla
    @littleshy

    reduce 在 python 3.5 没有了啊
    BBrother
        6
    BBrother  
       2016-11-10 10:46:30 +08:00
    @zungmou 你需要
    from functools import reduce
    import operator
    Herobs
        7
    Herobs  
       2016-11-10 10:47:06 +08:00 via Android
    reduce 或者递归
    Pythagodzilla
        8
    Pythagodzilla  
       2016-11-10 10:50:22 +08:00
    @zungmou 惊了,没仔细看发现写的是*...2L 是对的...
    staticor
        9
    staticor  
       2016-11-10 11:09:35 +08:00
    顺便可以了解一些函数式编程的内容
    zungmou
        10
    zungmou  
    OP
       2016-11-10 14:36:00 +08:00
    @BBrother 感谢
    @littleshy 好厉害!
    Zuckonit
        11
    Zuckonit  
       2016-11-10 14:38:29 +08:00
    reduce
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