code: def release(self, force=False):
          
          # There's no lock, so do nothing.
          if not self.islocked:
              return
  
          if self.owned_by_self or force:
              os.remove(self.path)
          else:
              raise UnableToReleaseLockError(self)
docs: Release lock.
  
          To release a lock, we must already own the lock.
  
          Arguments:
              force (bool, optional): If true, ignore any existing lock owner.
  
          Raises:
              UnableToReleaseLockError: If the lock is claimed by another
                process (not raised if force option is used).