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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 _get_values(cls, diff_dict, type='new'):
        '''
        Returns a dictionaries with the 'new' values in a diff dict.

        type
            Which values to return, 'new' or 'old'
        '''
        ret_dict = {}
        for p in diff_dict.keys():
            if type in diff_dict[p].keys():
                ret_dict.update({p: diff_dict[p][type]})
            else:
                ret_dict.update(
                    {p: cls._get_values(diff_dict[p], type=type)})
        return ret_dict