code: def chown(self, uid, gid):
          
          self.sftp._log(DEBUG, 'chown(%s, %r, %r)' % (hexlify(self.handle), uid, gid))
          attr = SFTPAttributes()
          attr.st_uid, attr.st_gid = uid, gid
          self.sftp._request(CMD_FSETSTAT, self.handle, attr)
docs: Change the owner (C{uid}) and group (C{gid}) of this file.  As with
          python's C{os.chown} function, you must pass both arguments, so if you
          only want to change one, use L{stat} first to retrieve the current
          owner and group.
  
          @param uid: new owner's uid
          @type uid: int
          @param gid: new group id
          @type gid: int