Python直接退出多重循环的方法

#python直接退出多重循环的方法
#方法1，抛出异常

            
              class getoutofloop(Exception): pass

try:
	for i in range(5):
		for j in range(5):
			for k in range(5):
				if i == j == k == 3:
					raise getoutofloop()
				else:
					print (i,'----', j,'----', k)
except getoutofloop:
	pass
print("done")

            
          

#方法2，函数中return

            
              def test():
	for i in range(5):
		for j in range(5):
			for k in range(5):
				if i == j == k == 3:
					return
				else:
					print (i, '----', j, '----', k)
test()

            
          

#方法3，利用for-else、continue和break

            
              for i in range(5):
	for j in range(5):
		for k in range(5):
			if i == j == k == 3:
				break
			else:
				print (i, '----', j, '----', k)
		else: continue
		break
	else: continue
	break