Python验证企业工商注册码

#coding: utf-8
def getchecknum(input): ##定义企业注册码校验码计算函数
  n = 10
  for num in range(len(input)):
    n = (int(input[num]) + n)%10
    if n == 0:
      n = 10
    n = n*2%11
  if n == 0:
    s = 1
  elif n== 1:
    s = 0
  else:
    s = 11-n
  return str(s)
 
code = raw_input(u'请输入该企业15位注册码:')
while True:
  try:
    len(code) == 15
    num = code[:14]
    check_num = int(code[14])
    if check_num == int(getchecknum(num)):
      print u'恭喜你，注册码正确。'
    else:
      print u'请注意，该注册码错误！！！'
 
    break
  except:
    print u"请输入正确的企业15位注册码"
raw_input(u'按任意键退出')