在Python中打破2 for循环

Question

我已经用Python制作了一个小脚本，蛮力给出了单词，当它找到单词时，它应该停止。

from itertools import product 
rangeone = int(raw_input("Set range1: ")) 
rangetwo = int(raw_input("Set range2: ")) 

question = raw_input("Give password: ") 

alphabets = 'abcdefghijklmnopqrstuvwxyz1234567890' 

for random in range(rangeone, rangetwo): 
    loops = product(alphabets, repeat=random) 
    for y in loops: 
     password = ''.join(y) 
     if password == question: 
      print "done" 
      break 

但是，它并没有打破循环。它继续前进

Answer 1

您的代码有两个循环，并且break只能打破内部循环。您可以定义一个变量（例如stop）。一旦这个词被发现，你把它设置为True，停止外循环：

from itertools import product 
rangeone = int(raw_input("Set range1: ")) 
rangetwo = int(raw_input("Set range2: ")) 

question = raw_input("Give password: ") 

alphabets = 'abcdefghijklmnopqrstuvwxyz1234567890' 

stop = False 
for random in range(rangeone, rangetwo): 
    loops = product(alphabets, repeat=random) 
    for y in loops: 
     password = ''.join(y) 
     if password == question: 
      print "done" 
      stop = True 
      break # breaks the inner loop 
    if stop: break # breaks the outer loop