在Python中解决“ ValueError：int（）以10为底的无效文字”

待我称王封你为后i 2022-12-07 12:52 222阅读 0赞

Hello everyone, So today we’re going to see the possible reasons and solutions for the error “**ValueError: invalid literal for int() with base 10**” in Python.

大家好，所以今天我们要看一下Python中错误“ **ValueError：int()的基数为10的无效文字** ”的可能原因和解决方案。

The main reason for this error is that in our program, we’re passing a non-integer value to a place where the interpreter expects an integer value.

造成此错误的主要原因是，在我们的程序中，我们将非整数值传递到解释器期望整数值的位置。

To understand the above lines, let’s take an example.

为了理解上述内容，我们举一个例子。

age = int(input("Enter your age: "))

When you run the above line, the interpreter will ask you to enter your age, when you will enter the age in numbers this program will be executed successfully, but if you’ll enter some string like

当您在上面的行中运行时，解释器将要求您输入年龄，当您以数字形式输入年龄时，此程序将成功执行，但是如果您输入一些字符串，例如

“Twenty three” then it will throw the error “**ValueError: Invalid literal for int() with base 10**”.

“ 23”将引发错误“ **ValueError：int()以10为底的无效文字** ”。

Because input() function returns a string and outside input() function we’re trying to convert the string into an integer using int(). So the string should be convertible to int, just like a number without any spaces. But when we pass the string that contains characters or spaces it will throw an error.

由于input()函数返回字符串，而在input()函数外部，我们试图使用int()将字符串转换为整数。 因此，字符串应该可以转换为int，就像没有空格的数字一样。 但是，当我们传递包含字符或空格的字符串时，它将引发错误。

So now you’ve got the basic idea behind this error, let’s see the common mistakes we do that led us to this error –

现在，您已经有了此错误的基本概念，让我们看看导致此错误的常见错误–

### 方案1： **(**Scenario 1:**)** ###

amount = int(input("enter the amount:"))
    print("amount = ", amount)

**Output 1:**

**输出1：**

*enter the amount:3400* *amount =  3400*

*输入金额：3400* *金额= 3400*

**Output 2:**

**输出2：**

*enter the amount:3400.5* *Traceback (most recent call last):* *  File “main.py”, line 1, in <module>* *    amount = int(input(“enter the amount:”))* *ValueError: invalid literal for int() with base 10: ‘3400.5’*

*输入数量：3400.5追溯* *(最近一次通话最近)：* *文件“ main.py”，第1行，在<module>中，* *数量= int(input(“ enter the amount：”))* *ValueError：int()的无效文字基本10：“ 3400.5”*

You’ve seen that in the first output the program runs successfully, But when we pass a decimal value it crashes with the same error. Normally, we can convert a float value to int using **int(),** So what went wrong now?

您已经看到在第一个输出中该程序成功运行，但是当我们传递一个十进制值时，它会崩溃，并显示相同的错误。 通常，我们可以使用**int()**将float值转换为int **，**那么现在出了什么问题？

Actually, as we know the **input()** function returns a string, not afloat value, So that’s why this time **int()** was unable to convert this to an integer and thrown this error.

实际上，据我们所知， **input()**函数返回的是字符串，而不是浮点值，所以这就是为什么这次**int()**无法将其转换为整数并引发此错误。

To solve it, we can write our program in this way:

为了解决这个问题，我们可以这样编写程序：

amount = int(float(input("enter the amount:")))
    print("amount = ", amount)

In this way, any value entered by the user will be converted to float first then to an integer. So it won’t throw any error if we pass a float value.

这样，用户输入的任何值都会先转换为浮点数，然后再转换为整数。 因此，如果我们传递浮点值，它将不会引发任何错误。

### 方案2： **(**Scenario 2:**)** ###

age = int(input("enter the age:"))
    print("age = ", age)

**Output 1:**

**输出1：**

*enter the age:23* *age =  23*

*输入年龄：23* *岁= 23*

**Output 2:**

**输出2：**

*enter the age:twenty three* *Traceback (most recent call last):* *  File “main.py”, line 1, in <module>* *    age = int(input(“enter the age:”))* *ValueError: invalid literal for int() with base 10: ‘twenty three’*

*输入年龄：23的* *回溯(最近一次调用最近)：* *文件“ main.py”，第1行中的<module>中* *age = int(input(“ enter the age：”))* *ValueError：int()的无效文字以10为基数：“ 23”*

The controls at the run time always will be in the hand of the user, So we can’t control it. But what we can do is to handle this using try-except blocks and throw a proper message so user can enter a valid integer.

运行时的控件始终在用户手中，因此我们无法对其进行控制。 但是我们可以做的是使用try-except块来处理此问题并抛出适当的消息，以便用户可以输入有效的整数。

try:
       age = int(input("enter the age:"))
       print("age = ", age)
    except ValueError:
       print("please enter age in digits")

**Output:**

**输出：**

*enter the age: twenty three* *please enter age in digits*

*输入年龄：二十三岁* *请输入数字*

So in this way, our program doesn’t crash and user will also understand the message.

因此，以这种方式，我们的程序不会崩溃，用户也将理解该消息。

### 结论 **(**Conclusion**)** ###

In the end, we can say that this problem mostly occurs when we’re passing a string instead of integer where an integer is required, like in two above examples in **int()** function we need to pass the value that can be converted to an integer.

最后，我们可以说这个问题主要发生在传递字符串而不是整数(其中需要整数)的情况下，例如在**int()**函数的两个以上示例中，我们需要传递可以转换为整数。

This problem can occur while reading the integer data from files (if spaces are there), the user passes an empty string in int().

从文件中读取整数数据时(如果存在空格)，用户在int()中传递空字符串时可能会发生此问题。

So that was all for this article, if you’re still facing any issue, you can let us know in the comment box.

这就是本文的全部内容，如果您仍然遇到任何问题，可以在评论框中告诉我们。

> 翻译自: [https://www.thecrazyprogrammer.com/2020/08/valueerror-invalid-literal-for-int-with-base-10.html][https_www.thecrazyprogrammer.com_2020_08_valueerror-invalid-literal-for-int-with-base-10.html]

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