如何在外面阻止无限循环？

Question

Consider the situation: i have the class(third-party library) with method that used infinity loop:

class Worker(object):
    ...
    def transator(self):
       ...
       #if connected print data 
       while self.connected:
           ...  
           print data

if __name__ == "__main__":
    worker = Worker()
    worker.translator()

I use this class in my program and can not be changed. ( I looked code on github :) ). What the best method to stop this method manually ? I need change self.connected to False outside this method. I have an idea, but I think it's very complicated.

import time
from threading import Thread 

class Terminator(Worker):
     ... 
     def terminate(self):
         time.sleep(10)
         self.connected = False

if __name__ == "__main__":
    ter = Terminator()
    t   = Tread(target=ter.terminate)
    t.start()
    ter.translator() 

Are there other ways?

Answer 1

Q: "How to stop an infinite loop on the outside"

A: Read the documentation for the method/class which is using the infinite loop and look to see if there are any parameters which influence how it runs.

For your use case, it looks to me like you should just be able to pass the timeout parameter to the TwythonStreamer constructor...

Answer 2

Alternatively to mcgilson correct answer you could add a property-descriptor like:

def toggle_connect(self, singleton=[True]):
    singleton[0] = not singleton[0]
    return singleton

and after:

worker=Worker()
Worker.connected = property(toggle_connect)

Answer 3

You should be able to do something like the following:

import time
from threading import Thread

if __name__ == "__main__":
    w = Worker()
    t = Thread(target=w.transator)
    t.start()
    time.sleep(10)
    w.connected = False
    t.join()