带有list参数的Python sum（）函数 [英] Python sum() function with list parameter

问题描述

我需要使用sum（）函数来对列表中的值求和。请注意，使用'for'循环手动添加数字是DISTINCT。我认为它会像下面这样简单，但我收到'TypeError：'int'对象不可调用'。

I am required to use the sum() function in order to sum the values in a list. Please note that this is DISTINCT from using a 'for' loop to add the numbers manually. I thought it would be something simple like the following, but I receive 'TypeError: 'int' object is not callable'.

numbers = [1, 2, 3]
numsum = (sum(numbers))
print(numsum)

我查看了一些其他涉及设置start参数，定义地图或在sum（）中包含'for'语法的解决方案，但我对这些变化没有任何好运，并且无法弄清楚发生了什么。有人可以向我提供sum（）的最简单的例子，它会对列表求和，并解释为什么它按照它的方式完成？

I looked at a few other solutions that involved setting the start parameter, defining a map, or including 'for' syntax within sum(), but I haven't had any luck with these variations, and can't figure out what's going on. Could someone provide me with the simplest possible example of sum() that will sum a list, and provide an explanation for why it is done the way it is?

推荐答案

您是否在其他地方使用过变量 sum ？这可以解释它。

Have you used the variable sum anywhere else? That would explain it.

>>> sum = 1
>>> numbers = [1, 2, 3]
>>> numsum = (sum(numbers))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'int' object is not callable

名称 sum 现在不再指向函数，它指向一个整数。

The name sum doesn't point to the function anymore now, it points to an integer.

解决方案：不要调用变量总和，称之为总计或类似的东西。

Solution: Don't call your variable sum, call it total or something similar.

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