__init__() got multiple values for argument 'n_splits'

This error occurs when the `__init__()` method of a class is called with multiple values for the same argument. In the context of machine learning, this error can occur when creating an instance of a cross-validation object with the `KFold` or `StratifiedKFold` class.

For example, if you write the following code:

from sklearn.model_selection import KFold

kf = KFold(n_splits=5, shuffle=True, n_splits=10)

You will get the error message:

TypeError: __init__() got multiple values for argument 'n_splits'

To fix this error, make sure that each argument is only assigned one value. In the above example, `n_splits` is assigned two values. To fix this error, you can simply remove one of the `n_splits` arguments:

from sklearn.model_selection import KFold

kf = KFold(n_splits=5, shuffle=True)

Now the `KFold` object will be created without any errors.