code: def check_bankcard(cls, card_number_str):
          
  
          if isinstance(card_number_str, int):
              card_number_str = str(card_number_str)
  
          checkcode = card_number_str[-1]
  
          result = CardBin.get_checkcode(card_number_str[0:-1])
  
          return checkcode == result
docs: 检查银行卡校验位是否正确；
  
          :param:
              * card_number_str: (string) 要查询的银行卡号
          :returns:
              返回结果：(bool) True or False
  
          举例如下::
  
              from fishbase.fish_data import *
  
              print('--- fish_data check_bankcard demo ---')
  
              # 不能放真的卡信息，有风险
              print(CardBin.check_bankcard('4391880006990100'))
  
              print('---')
  
          输出结果::
  
              --- fish_data check_bankcard demo ---
              False
              ---