python的跳出循环方式（跳出多层循环方法）

• 常规的break跳出当前循环,continue终止当前，不会跳出整个循环,当有多个循环时，如何跳出整个循环

 def test1():
    for i in range(3):
        for j in range(3):
            for k in range(3):
                if i ==j==k==1:
                    break
                else:
                    print (i,j,k)
test1()

0 0 0
0 0 1
0 0 2
0 1 0
0 1 1
0 1 2
0 2 0
0 2 1
0 2 2
1 0 0
1 0 1
1 0 2
1 1 0
1 2 0
1 2 1
1 2 2
2 0 0
2 0 1
2 0 2
2 1 0
2 1 1
2 1 2
2 2 0
2 2 1
2 2 2

def test2():
    for i in range(3):
        for j in range(3):
            for k in range(3):
                if i ==j==k==1:
                    continue
                else:
                    print (i,j,k)
test2()

0 0 0
0 0 1
0 0 2
0 1 0
0 1 1
0 1 2
0 2 0
0 2 1
0 2 2
1 0 0
1 0 1
1 0 2
1 1 0
1 1 2
1 2 0
1 2 1
1 2 2
2 0 0
2 0 1
2 0 2
2 1 0
2 1 1
2 1 2
2 2 0
2 2 1
2 2 2

class getOutOfLoop(Exception):
    pass

try:
    for i in range(3):
        for j in range(3):
            for k in range(3):
                if i == j ==k ==1:
                    raise getOutOfLoop()#抛出一个异常，就会跳出所有循环
                else:
                    print(i,j,k)
except getOutOfLoop:
    pass
print('done')

0 0 0
0 0 1
0 0 2
0 1 0
0 1 1
0 1 2
0 2 0
0 2 1
0 2 2
1 0 0
1 0 1
1 0 2
1 1 0
done

 def test3():
    for i in range(3):
        for j in range(3):
            for k in range(3):
                if i ==j==k==1:
                    return
                else:
                    print (i,j,k)
    print('done')
test3()

0 0 0
0 0 1
0 0 2
0 1 0
0 1 1
0 1 2
0 2 0
0 2 1
0 2 2
1 0 0
1 0 1
1 0 2
1 1 0