# doctest: +SKIP
>>> store.put('data', df1, format='table')  # doctest: +SKIP
>>> df2 = pd.DataFrame([[5, 6], [7, 8]], columns=['A', 'B'])
>>> store.append('data', df2)  # doctest: +SKIP
>>> store.close()  # doctest: +SKIP
   A  B
0  1  2
1  3  4
0  5  6
1  7  8
Nz>columns is not a supported keyword in append, try data_columnsz