It's just a simple implementation of distribution lock.
We could use redis distribution lock to manipulate some shared resources safely in distributed context.
You could quickly test
python3 -m tests.xxxYou could take adventage of a redis distribution lock in a very simple way.
import redis
import lock
r = redis.Redis(host='localhost', port=6379, db=0)
# if-else
def deduct_inventory(...):
lock = lock.RedisDistributionLock()
if lock.acquire(...):
...
lock.release()
# with
def deduct_inventory(...):
with lock.RedisDistributionLock():
...
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