python跳出多重循环

使用自定义异常可以跳出深层嵌套循环、看我做过的例子:
class FoundException(Exception): pass

try:
    for row,record in enumerate(table):
         for columu,field in enumerate(record):
               for index,item in enumerate(field):
                       if item == target:
                                 raise FoundException()
except FoundException:
      print ("found at ({0},{1},{2})".format(row,column,index))
else:
       print ('not found')

封装成 函数   将 break 语句 换成  return
def test():
    for x in range(9,0,-1):
         for y in range(9,-1,-1):
                for z in range(9,-1,-1):
                   s = 100001*x+10010*y+1100*z
                   s1 = int((round((s**0.5),0))) + 1
                   for i in range(s1,100,-1):
                      if s % s1 ==0:
                         print s,i
                         return s