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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _from_dict(cls, _dict):
 """Initialize a ClassifyReturn object from a json dictionary."""

        args = {}
        if 'document' in _dict:
            args['document'] = Document._from_dict(_dict.get('document'))
        if 'model_id' in _dict:
            args['model_id'] = _dict.get('model_id')
        if 'model_version' in _dict:
            args['model_version'] = _dict.get('model_version')
        if 'elements' in _dict:
            args['elements'] = [
                Element._from_dict(x) for x in (_dict.get('elements'))
            ]
        if 'tables' in _dict:
            args['tables'] = [
                Tables._from_dict(x) for x in (_dict.get('tables'))
            ]
        if 'document_structure' in _dict:
            args['document_structure'] = DocStructure._from_dict(
                _dict.get('document_structure'))
        if 'parties' in _dict:
            args['parties'] = [
                Parties._from_dict(x) for x in (_dict.get('parties'))
            ]
        if 'effective_dates' in _dict:
            args['effective_dates'] = [
                EffectiveDates._from_dict(x)
                for x in (_dict.get('effective_dates'))
            ]
        if 'contract_amounts' in _dict:
            args['contract_amounts'] = [
                ContractAmts._from_dict(x)
                for x in (_dict.get('contract_amounts'))
            ]
        if 'termination_dates' in _dict:
            args['termination_dates'] = [
                TerminationDates._from_dict(x)
                for x in (_dict.get('termination_dates'))
            ]
        if 'contract_type' in _dict:
            args['contract_type'] = [
                ContractType._from_dict(x) for x in (_dict.get('contract_type'))
            ]
        return cls(**args)