How does Python jump out of multiple loops?

I encountered this problem when I wrote the Euler's question tonight. I need to jump out of a triple loop, but it is really helpless. There is no good way. The following isCode:

 Import  Time  Def  Isprime (n ):  """  This function return a number is a prime or not  """      From Math Import  SQRT  For I In Range (2, INT (SQRT (N) + 1 ): If N % I = 0:  Return  False  Return  True  Def  Permu (m, n ):  """  This function return if two numbers has the same digits.  """  MS = List (STR (M) ms. Sort () NS = List (STR (N) ns. Sort () If MS = NS:  Return  True  Else  :  Return  False Start = Time. Clock () primelist = [I For I In Range (1000,999 9) If  Isprime (I)] primeset = Set (primelist) N =Len (primelist) count = 0  While Count! = 2 :  For I In Range (0, N-2 ):  For J In Range (I + 1, n-1 ): B = (Primelist [I] + primelist [J])/2 If B In  Primeset: If Permu (primelist [I], primelist [J]) And  Permu (primelist [I], INT (B): Count + = 1 If Count = 2 :  Print (STR (primelist [I]) + STR (INT (B) + STR (primelist [J])  Print (Time. Clock ()-start)

 

The intention is to jump out of this triple loop when Count = 2, and the results show that no matter how you write it. Therefore, you can only jump out with a limit on while.

 

The following are other people's ideas on how to jump out of multiple cycles.

1. You can insert an exception to jump out.

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 ' )

 

Second, put it in the function body and return it using the return statement.

 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

 

Of course, if it is a while loop, you can add a flag to the top layer as I do, and then jump out.