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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 MessageInput object from a json dictionary."""

        args = {}
        if 'message_type' in _dict:
            args['message_type'] = _dict.get('message_type')
        if 'text' in _dict:
            args['text'] = _dict.get('text')
        if 'options' in _dict:
            args['options'] = MessageInputOptions._from_dict(
                _dict.get('options'))
        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 'suggestion_id' in _dict:
            args['suggestion_id'] = _dict.get('suggestion_id')
        return cls(**args)