not enough values to unpack (expected 4, got 3)
时间: 2023-09-04 18:10:42 浏览: 65
This error message is typically raised when you are trying to unpack a sequence (such as a tuple or list) into a set number of variables, but the sequence does not have enough elements to do so.
For example, suppose you have the following code:
```
a, b, c, d = (1, 2, 3)
```
Here, you are trying to unpack a 3-element tuple into 4 variables. Since there are not enough elements in the tuple to fill all the variables, Python will raise a "not enough values to unpack" error.
To fix this error, you need to ensure that the sequence you are unpacking has the correct number of elements. In the above example, you could add a fourth element to the tuple to fix the error:
```
a, b, c, d = (1, 2, 3, 4)
```