def _g_open(self):
        (self.shape, self.byteorder, object_id) = self._open_unimplemented()
        try:
            self.nrows = SizeType(self.shape[0])
        except __HOLE__:
            self.nrows = SizeType(0)
        return object_id
dataset/ETHPy150Open PyTables/PyTables/tables/unimplemented.py/UnImplemented._g_open