Initialize a ClassifierList object from a json dictionary.

def _from_dict(cls, _dict):
        """Initialize a ClassifierList object from a json dictionary."""
        args = {}
        if 'classifiers' in _dict:
            args['classifiers'] = [
                Classifier._from_dict(x) for x in (_dict.get('classifiers'))
            ]
        else:
            raise ValueError(
                'Required property \'classifiers\' not present in ClassifierList JSON'
            )
        return cls(**args)