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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 MessageRequest object from a json dictionary."""

        args = {}
        if 'input' in _dict:
            args['input'] = MessageInput._from_dict(_dict.get('input'))
        if 'intents' in _dict:
            args['intents'] = [
                RuntimeIntent._from_dict(x) for x in (_dict.get('intents'))
            ]
        if 'entities' in _dict:
            args['entities'] = [
                RuntimeEntity._from_dict(x) for x in (_dict.get('entities'))
            ]
        if 'alternate_intents' in _dict:
            args['alternate_intents'] = _dict.get('alternate_intents')
        if 'context' in _dict:
            args['context'] = Context._from_dict(_dict.get('context'))
        if 'output' in _dict:
            args['output'] = OutputData._from_dict(_dict.get('output'))
        if 'actions' in _dict:
            args['actions'] = [
                DialogNodeAction._from_dict(x) for x in (_dict.get('actions'))
            ]
        return cls(**args)