python函数在数组中查找正数之和 [英] python function to find sum of positive numbers in an array

问题描述

我需要编写一个函数，该函数接受一个数字数组并找到所有数字的最大和。换句话说，我需要找到正数之和。我写了这个，我得到列表超出范围

i need to write a function that takes an array of numbers and finds the maximum sum of all the numbers. In other words, I need to find the sum of just the positive numbers. I wrote this, I'm getting "list is out of range"

想法？

    def maximum_sub(A):
        x = 0
        i = 0
        for i in A:
            while A[i] > 0:
            x+=A[i]
            i+=1
        return x

推荐答案

使用超级功能并列出列表，而不是：

Use super functions and list comprehension instead:

>>> a = [1, 2, 3, -4, 5, -3, 7, 8, 9, 6, 4, -7]
>>> sum(x for x in a if x > 0)
45

---

[如果x> 0] 将创建一个由 a 中的正值组成的数组。

---

[x for x in a if x > 0] will create an array made of the positive values in a.

sum（...）将返回该数组中元素的总和。

sum(...) will return the sum of the elements in that array.

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