Update pandas dataframe based on matching columns of a second dataframe

Question

I have two pandas dataframes (df_1, df_2) with the same columns, but in one dataframe (df_1) some values of one column are

Answer 1

I think you need set_index for Multiindex in both DataFrames and then combine_first or fillna:

df1 = df_1.set_index(["housenumber", "street"])
df2 = df_2.set_index(["housenumber", "street"])

df = df1.combine_first(df2).reset_index()

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df = df1.fillna(df2).reset_index()