async def fetchone(self):
        """ Fetch next row """
        self._check_executed()
        row = await self._read_next()
        if row is None:
            return
        self._rownumber += 1
        return row
async def fetchone ( self ) : self . _check_executed ( ) row = await self . _read_next ( ) if row is None : return self . _rownumber += 1 return row
Fetch next row