麻烦从字符串转换为int python [英] Troubles converting from string to int python

问题描述

我正在研究这个编码难题，并且必须将字符串中的一些数字转换为整数才能使用它们。一个例子是

I'm working on this coding puzzle and have to covert some numbers in a string to integers to work with them. an example would be

('2 -5 7 8 10 -205')

我尝试做的是将数字添加到空字符串中，并在有空格时将它们转换为int。这是代码。

What I tried to do was add the numbers to an empty string and convert them to an int when there was a space. Here's the code.

n是数字字符串的长度
num是我添加数字的空字符串。原来num =

n is the length of the string of numbers num is the empty string I add the numbers to. Originally num=""

  while i<n:

    if temps[i]!=' ':
        num=num+temps[i]


    elif temps[i]==' ':
        print type(num)

        x=int(num)

问题是当它运行时我得到一个错误line with x = int（num）say

The problem is that when it runs I get an error for the line with x=int(num) saying

ValueError: invalid literal for int() with base 10: ''

当我打印num时，我只是以字符串格式获取数字，所以我不明白什么是错的。帮助将非常感激，如果您有任何问题或需要澄清，请询问。

when i print num I just get numbers in a string format, so I don't understand what's wrong. Help would be really appreciated, and if you have any questions or need clarification please ask.

谢谢

推荐答案

使用 str.split（）在空格处拆分字符串，然后应用 int 到每个元素：

Use str.split() to split your string at spaces, then apply int to every element:

s = '2 -5 7 8 10 -205'
nums = [int(num) for num in s.split()]

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