Arguments
str
required
The key
Response
The number of milliseconds until this expires, negative if the key does not exist or does not have an expiration set.
redis.set("key1", "Hello")
assert redis.pttl("key1") == -1
redis.expire("key1", 1000)
assert redis.pttl("key1") > 0
redis.persist("key1")
assert redis.pttl("key1") == -1