問題描述

我需要使用 sum() 函數來對列表中的值求和.請注意，這與使用 for 循環手動添加數字不同.我以為它會像下面這樣簡單，但我收到 TypeError: 'int' object is not callable.

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)

我查看了一些其他解決方案，這些解決方案涉及設置 start 參數、定義地圖或在 sum() 中包含 for 語法，但我沒有這些變化的任何運氣，并且無法弄清楚發生了什么.有人可以為我提供最簡單的 sum() 示例，該示例將匯總一個列表，并解釋為什么它會以這種方式完成?

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?

推薦答案

你在其他地方使用過變量 sum 嗎?這樣就可以解釋了.

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

sum 這個名字現在不再指向函數，它指向一個整數.

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

解決方案:不要將變量稱為 sum，將其稱為 total 或類似的名稱.

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

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