A distributed semaphore and mutex built on Redis.
To install redis-semaphore, simply:
pip install redis-semaphore
Or alternatively, you can download the repository and install manually by doing:
git clone [email protected]:bluele/redis-semaphore.git cd redis-semaphore python setup.py install
from redis import Redis from redis_semaphore import Semaphore from threading import Thread import urllib2 import time semaphore = Semaphore(Redis(), count=2, namespace='example') def task(i): url = 'https://www.google.co.jp/' with semaphore: print('id: {} => {}'.format(i, urllib2.urlopen(url).code)) print('sleep...') time.sleep(2) def main(): threads = list() for i in range(5): threads.append(Thread(target=task, args=(i,))) for th in threads: th.start() for th in threads: th.join() if __name__ == '__main__': main()