code: def __expand_meta_datas(meta_datas, meta_datas_expanded):
      
      if isinstance(meta_datas, dict):
          meta_datas_expanded.append(meta_datas)
      elif isinstance(meta_datas, list):
          for meta_data in meta_datas:
              __expand_meta_datas(meta_data, meta_datas_expanded)
docs: expand meta_datas to one level
  
      Args:
          meta_datas (dict/list): maybe in nested format
  
      Returns:
          list: expanded list in one level
  
      Examples:
          >>> meta_datas = [
                  [
                      dict1,
                      dict2
                  ],
                  dict3
              ]
          >>> meta_datas_expanded = []
          >>> __expand_meta_datas(meta_datas, meta_datas_expanded)
          >>> print(meta_datas_expanded)
              [dict1, dict2, dict3]