code: def release(self):
          "Releases the already acquired lock"
          if self.acquired_until is None:
              raise ValueError("Cannot release an unlocked lock")
          existing = float(self.redis.get(self.name) or 1)
          # if the lock time is in the future, delete the lock
          if existing >= self.acquired_until:
              self.redis.delete(self.name)
          self.acquired_until = Nonf release(self):
          "Releases the already acquired lock"
          if self.acquired_until is None:
              raise ValueError("Cannot release an unlocked lock")
          existing = float(self.redis.get(self.name) or 1)
          # if the lock time is in the future, delete the lock
          if existing >= self.acquired_until:
              self.redis.delete(self.name)
          self.acquired_until = None
docs: Releases the already acquired lock