when subsetting with and without .loc[ ] in python?

I was doing a Python exercises and I got the wrong answer (in red). I’m a bit confused about subsetting with and without loc[ ]. Please enlighten me. Thank you.

Answer

The df.loc[:, ['alignment', 'character']] itself is a dataframe. What you’re doing wrong is passing it inside df.

I suggest you to look around at the related pandas documentation.