how to query seed used by random.random()?

It is not possible to get the automatic seed back out from the generator. I normally generate seeds like this:

seed = random.randrange(sys.maxsize)
rng = random.Random(seed)
print("Seed was:", seed)

This way it is time-based, so each time you run the script (manually) it will be different, but if you are using multiple generators they won’t have the same seed simply because they were created almost simultaneously.