Outer merging two data frames in place in pandas

Question

How can I outer merge two data frames in place in pandas?

For example, assume we have these two data frames:

import pandas as pd

s1 = pd.DataFrame({         


        

Answer 1

Since there is not inplace parameter in pandas.merge i think the most you can do is:

s1 = pd.merge(s1,s2,how='outer')

other than that, i don't think there's much left to do.
Hope that was helpful somehow.