boost.py

import numpy as np
import scipy.sparse as sp
from abc import ABCMeta
from sklearn.utils import check_array, check_X_y, check_random_state
from sklearn.tree import DecisionTreeClassifier
from sklearn.tree.tree import BaseDecisionTree
from sklearn.tree._tree import DTYPE
from sklearn.ensemble.forest import BaseForest
from multimodal.datasets.data_sample import DataSample
from multimodal.datasets.data_sample import MultiModalData, MultiModalArray, MultiModalSparseArray


class UBoosting(metaclass=ABCMeta):
    """
    Abstract class MuCumboClassifier and  MumboClassifier should inherit from
    UBoosting for methods
    """

    def _validate_X_predict(self, X):
        """Ensure that X is in the proper format."""
        if (self.base_estimator is None or
                isinstance(self.base_estimator,
                           (BaseDecisionTree, BaseForest))):
            check_array(X, accept_sparse='csr', dtype=DTYPE)

        else:
            check_array(X, accept_sparse=['csr', 'csc'])
        if X.ndim < 2:
            X = X[np.newaxis, :]
            if X.shape[1] != self.n_features_:
                raise ValueError("Number of features of the model must "
                                    "match the input. Model n_features is %s and "
                                     "input n_features is %s " % (self.n_features_, X.shape[1]))
            else:
                mes = "Reshape your data"
                raise ValueError(mes)
        if X.ndim > 1:
            if X.shape[1] != self.n_features_:
                if X.shape[0] == self.n_features_ and X.shape[1] > 1:
                    raise ValueError("Reshape your data")
                else:
                    raise ValueError("Number of features of the model must "
                                    "match the input. Model n_features is %s and "
                                     "input n_features is %s " % (self.n_features_, X.shape[1]))


            #
            # raise ValueError(mes)
        return X

    def _global_X_transform(self, X, views_ind=None):
        X_ = None
        if isinstance(X, sp.spmatrix):
            X_ = MultiModalSparseArray(X, views_ind)
        else:
            X_ = MultiModalArray(X, views_ind)
        if isinstance(X, MultiModalData):
            X_ = X
        if not isinstance(X_, MultiModalData):
            try:
                X_ = np.asarray(X)
                X_ = MultiModalArray(X_)
            except Exception as e:
                raise TypeError('Reshape your data')
        return X_