_split.py 文件源码

def get_n_splits(self, X, y=None, labels=None):
        """Returns the number of splitting iterations in the cross-validator

        Parameters
        ----------
        X : array-like, shape (n_samples, n_features)
            Training data, where n_samples is the number of samples
            and n_features is the number of features.

        y : object
            Always ignored, exists for compatibility.

        labels : object
            Always ignored, exists for compatibility.
        """
        if X is None:
            raise ValueError("The X parameter should not be None")
        return int(comb(_num_samples(X), self.p, exact=True))