not enough values to unpack (expected 5, got 4)

This error occurs when you try to unpack a sequence into variables, but the number of values in the sequence does not match the number of variables you are trying to assign them to.

In Python, unpacking is a way to assign values from a sequence (such as a tuple or list) to individual variables in a single line. For example:

a, b, c, d = (1, 2, 3)  # Error: not enough values to unpack

In this example, we are trying to unpack a tuple with three values into four variables. Since there are not enough values to assign to all the variables, it raises the "not enough values to unpack" error.

To fix this error, you need to ensure that the number of variables matches the number of values in the sequence you are trying to unpack. For example:

a, b, c, d = (1, 2, 3, 4)

In this case, we have four variables and four values in the tuple, so the unpacking will work without any errors.