Python exit from all running threads on truthy condition

I am using threads to check a header status code from an API url. How can i break loop/stop all other threads if condition is true. Please check following code..

import logging, time, threading, requests

#: Log items
logging.basicConfig(format='%(asctime)s %(levelname)s : %(message)s', level=logging.INFO)

class EppThread(threading.Thread):
    def __init__(self, group=None, target=None, name=None, args=(), kwargs=None, verbose=None):
        threading.Thread.__init__(self, group=group, target=target, name=name, verbose=verbose)
        self.args = args

    def run(self):
        startTime = time.time()
        url = self.args[0]
        limit = self.args[1]

        for i in range(limit):
            response = requests.get(url)
            if response.status_code != 200:
                break
                #Exit other similar threads (with same url)
            else:
                print('Thread {0} - success'.format(thread.getName()))

         print('process completed')
         # Send Email


number_of_threads = 5
number_of_requests = 100

urls = ['https://v1.api.com/example', 'https://v2.api.com/example']

if __name__ == '__main__':
    startTime = time.time()

    for url in urls:
        threads = []
        for i in range(number_of_threads):
            et = EppThread(name = "{0}-Thread-{1}".format(name, i + 1), args=(url, number_of_requests))
            threads.append(et)
            et.start()

    # Check if execution time is not greater than 1 minute  
    while len(threads) > 0 and (time.time() - startTime) < 60:
        time.sleep(0.5)
        for thread in threads:
            if not thread.isAlive():
                threads.remove(thread)
                print('Thread {0} terminated'.format(thread.getName()))

    os._exit(1)

Please suggest some better ways that stops code execution if condition gets true in any running thread.

Thanks for your help.