>The second argument of pd.concat is 'axis', which defaults to 0. Try >using 1 instead of 0.
Unfortunately, that doesn't help... dict[name] = pd.concat( [dict[name],values], axis=1 ) {'dummy': Value M1 0 M2 0 M3 0, 'K1': Value Value 0 10.0 NaN 1 5.0 NaN 2 10.0 NaN 6 NaN 2.0 7 NaN 2.0 8 NaN 2.0, 'K2': Value 3 20 4 10 5 15} Regards, Mahmood -- https://mail.python.org/mailman/listinfo/python-list