def _create_variables(self, n_features, n_classes):
        """Create the TensorFlow variables for the model.

        :param n_features: number of features
        :param n_classes: number of classes
        :return: self
        """
        self.W_ = tf.Variable(
            tf.zeros([n_features, n_classes]), name='weights')
        self.b_ = tf.Variable(
            tf.zeros([n_classes]), name='biases')
Create the TensorFlow variables for the model.

        :param n_features: number of features
        :param n_classes: number of classes
        :return: self
        
yadlt/models/linear/logistic_regression.py