def __init__(self, metadata=None):
        super(XMLDeserializer, self).__init__()
        self.metadata = metadata or {}
Impute all missing values in X.
dataset/ETHPy150Open openstack/rack/rack/api/wsgi.py/XMLDeserializer.__init__--crossover with--dataset/ETHPy150Open scikit-learn/scikit-learn/sklearn/preprocessing/imputation.py/Imputer.transform