<human>:  Merge DataFrames in Pandas using the mean
<bot>: Here is some code to merge rows from dataframe `df1` with rows from dataframe `df2` and calculate the mean for rows that have the same value of axis 1

pd.concat((df1, df2), axis=1).mean(axis=1)

#Warning: this code generation is experimental. Please inspect the code for any bugs before executing.