code: def get_stock_type(stock_code):
      
      stock_code = str(stock_code)
      if stock_code.startswith(("sh", "sz")):
          return stock_code[:2]
      if stock_code.startswith(
          ("50", "51", "60", "73", "90", "110", "113", "132", "204", "78")
      ):
          return "sh"
      if stock_code.startswith(
          ("00", "13", "18", "15", "16", "18", "20", "30", "39", "115", "1318")
      ):
          return "sz"
      if stock_code.startswith(("5", "6", "9")):
          return "sh"
      return "sz"
docs: 判断股票ID对应的证券市场
      匹配规则
      ['50', '51', '60', '90', '110'] 为 sh
      ['00', '13', '18', '15', '16', '18', '20', '30', '39', '115'] 为 sz
      ['5', '6', '9'] 开头的为 sh， 其余为 sz
      :param stock_code:股票ID, 若以 'sz', 'sh' 开头直接返回对应类型，否则使用内置规则判断
      :return 'sh' or 'sz