code: def release_readlock(lockdir_name):
      
      # Make sure the lock still exists before deleting it
      if os.path.exists(lockdir_name) and os.path.isdir(lockdir_name):
          os.rmdir(lockdir_name)
docs: Release a previously obtained readlock.
  
      Parameters
      ----------
      lockdir_name : str
          Name of the previously obtained readlock