python - Poly Interpolate Multiple Dataframes to same length -

i have multiple dataframes have same number of columns not have same number of rows. need able iterations through them @ same time cannot if different lengths. therefore figured best interpolate data given number of rows. possible? have tried using:

testdf1 = df1.reindex(df1.index.union(numpy.linspace(0.00, 4304.92, 860.984))) testdf1.interpolate('index')  

only issue returns data frame load of nan's , on number of rows needed puts original data in.

these data frames on 50 columns long , ~600 rows down.

edit pressed post before completion

a standard dataframe so:

           b       c        d   z  0.00     7.2     100.22   12.1  y  7.06     3.4     150.21   12.1  x  12.56    1.2     176.32   12.1  w  20.98    1.2     190.23   12.1  ... 

and on.