code: def QA_util_code_tolist(code, auto_fill=True):
      
  
      if isinstance(code, str):
          if auto_fill:
              return [QA_util_code_tostr(code)]
          else:
              return [code]
  
      elif isinstance(code, list):
          if auto_fill:
              return [QA_util_code_tostr(item) for item in code]
          else:
              return [item for item in code]
docs: 转换code==> list
  
      Arguments:
          code {[type]} -- [description]
  
      Keyword Arguments:
          auto_fill {bool} -- 是否自动补全(一般是用于股票/指数/etf等6位数,期货不适用) (default: {True})
  
      Returns:
          [list] -- [description]