concat two dataframe using python -


we have 1 dataframe like

-0.140447131    0.124802527 0.140780106 0.062166349    -0.121484447 -0.140675515 -0.002989106    0.13984927  0.004382326

and other 

1 1 2

we need concat both dataframe like

-0.140447131    0.124802527 0.140780106  1 0.062166349    -0.121484447 -0.140675515 1 -0.002989106    0.13984927  0.004382326  2

let's first dataframe like

in [281]: df1 out[281]:                   b         c 0 -0.140447  0.124803  0.140780 1  0.062166 -0.121484 -0.140676 2 -0.002989  0.139849  0.004382

and, second like,

in [283]: df2 out[283]:    d 0  1 1  1 2  2

then create new column df1 using df2

in [284]: df1['d_new'] = df2['d']  in [285]: df1 out[285]:                   b         c  d_new 0 -0.140447  0.124803  0.140780      1 1  0.062166 -0.121484 -0.140676      1 2 -0.002989  0.139849  0.004382      2

the assumption being both dataframes have common index


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