code: def ungrab_key(conn, wid, modifiers, key):
      
      try:
          for mod in TRIVIAL_MODS:
              conn.core.UngrabKeyChecked(key, wid, modifiers | mod).check()
  
          return True
      except xproto.BadAccess:
          return False
docs: Ungrabs a key that was grabbed by ``grab_key``. Similarly, it will return
      True on success and False on failure.
  
      When ungrabbing a key, the parameters to this function should be
      *precisely* the same as the parameters to ``grab_key``.
  
      :param wid: A window identifier.
      :type wid: int
      :param modifiers: A modifier mask.
      :type modifiers: int
      :param key: A keycode.
      :type key: int
      :rtype: bool