How to split/expand a string value into several pandas DataFrame rows?

Question

Let\'s say my DataFrame df is created like this:

df = pd.DataFrame({\"title\" : [\"Robin Hood\", \"Madagaskar\"],
                  \"genres\" :         


        

Answer 1

In [33]: (df.set_index('title')
            ['genres'].str.split(',\s*', expand=True)
            .stack()
            .reset_index(name='genre')
            .drop('level_1',1))
Out[33]:
        title      genre
0  Robin Hood     Action
1  Robin Hood  Adventure
2  Madagaskar     Family
3  Madagaskar  Animation
4  Madagaskar     Comedy

PS here you can find more generic approach.