Redis ttl and pttl returns None when ttl value is 0

[marakal]

r=redis.Redis()
print r.set("foo", "bar")
print r.expire("foo", 1)
time.sleep(0.5)
print r.ttl("foo")
print r.get("foo")

prints

True
True
None
bar

but ttl should return 0 in this case, expire is set

[AndreaCrotti]

+1 overall it seems to behave weirdly, returning None in both the cases where redis would return -1 or -2..

[jkasarherou]

it works correctly if you use
r = redis.StrictRedis()

[micahculpepper]

👍 for this issue. Per the command reference at https://redis.io/commands/ttl, ttl should return a -1 when expire is not set, and this is exactly what I see when hitting my redis instance directly. When I try to check the ttl on a key that does not have an expire set using this library, I get None.

[gyermolenko]

Tested with python3.7.3, redis3.2.1 - not reproduced.

# x.py
import redis
import time
r=redis.Redis()

r.set("exp", "expval")
r.expire("exp", 1)
time.sleep(0.5)

print(r.ttl("exp"))
print(r.pttl("exp"))
print(r.get("exp"))
time.sleep(1)

print(r.ttl("exp"))
print(r.pttl("exp"))
print(r.get("exp"))

$ python x.py 
0
499
b'expval'
-2
-2
None

[andymccurdy]

This was resolved as part of redis-py 3.0. Closing this.