unsupported operand type(s) for -: 'list' and 'int'
时间: 2024-01-24 18:01:36 浏览: 26
这个错误通常出现在你尝试对一个列表和一个整数执行减法操作时。例如,你可能会尝试从列表中删除一个元素,但使用了错误的索引。请检查你的代码,确保你正在使用正确的数据类型执行正确的操作。如果你需要进行列表元素的删除,请使用 `del` 关键字或 `remove()` 方法。如果你需要对列表中的元素执行数学运算,请确保你的代码中使用的是数值类型而不是列表类型。
相关问题
TypeError: unsupported operand type(s) for -: 'list' and 'int'
This error occurs when you try to subtract an integer from a list, which is not supported in Python. Here's an example:
```
my_list = [1, 2, 3]
result = my_list - 2
```
In this case, the error message would be:
```
TypeError: unsupported operand type(s) for -: 'list' and 'int'
```
To fix this error, you need to make sure you're using the correct data types in your calculations. If you want to subtract a number from every element in a list, you can use a list comprehension:
```
my_list = [1, 2, 3]
result = [x - 2 for x in my_list]
print(result) # Output: [-1, 0, 1]
```
This will create a new list with the result of subtracting 2 from each element of the original list.
unsupported operand type(s) for -: 'int' and 'list'
这个错误通常发生在你试图用一个列表去减去一个整数。例如:
```
a = [1, 2, 3]
b = 2
c = a - b
```
这个错误会出现,因为你不能用一个整数去减去一个列表。如果你想要对列表中的每个元素都进行减法操作,你需要使用循环或者列表推导式。例如:
```
a = [1, 2, 3]
b = 2
c = [i - b for i in a]
```
这样,c 的值就会是 [1, 0, -1],即a中每个元素都减去了b。