merge - Python Pandas: how to overwrite subset of a dataframe with a subset of another dataframe? -


given df1 , df2, how df3 using pandas, df3 has df1 elements: 

[11, 12, 21, 22]

in place of df2 elements

[22, 23, 32, 33]

condition: indexes of row 1 & 2 in df1 same indexes of row 2 & 3 in df2

you looking dataframe.loc method

small example:

import pandas pd df1 = pd.dataframe({"data":[1,2,3,4,5]}) df2 = pd.dataframe({"data":[11,12,13,14,15]}) df3 = df1.copy() df3.loc[3:4] = df2.loc[3:4]  df3    data 0     1 1     2 2     3 3    14 4    15

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