Concatenate dataframes with multi-index in pandas dataframe
问题 I have two dataframes df1 and df2 : In [56]: df1.head() Out[56]: col7 col8 col9 alpha0 D0 alpha0 D0 alpha0 D0 F35_HC_531d.dat 1.103999 1.103999 1.364399 1.358938 3.171808 1.946894 F35_HC_532d.dat 0.000000 0.000000 1.636934 1.635594 4.359431 2.362530 F35_HC_533d.dat 0.826599 0.826599 1.463956 1.390134 3.860629 2.199387 F35_HC_534d.dat 1.055350 1.020555 3.112200 2.498257 3.394307 2.090668 F52_HC_472d.dat 3.808008 2.912733 3.594062 2.336720 3.027449 2.216112 In [62]: df2.head() Out[62]: col7