picking out elements based on complement of indices in Python pandas

Question

I have a dataframe out of which I pick two subset dfs, df_a and df_b. For example in iris dataset:

df_a = iris[iris.Name =         


        

Answer 1

This seems a bit faster than your second solution. There's a bit more overhead when indexing with .ix:

df[~df.index.isin(df_a.index+df_b.index)]