Python Pandas how to change row labels to first column

I have this sample of a data frame showing population over the years.

I want to remove the row labels ‘Country Code’ altogether and have the next column, ‘Country Name’, as the row labels instead. How can I do this?

Please let me know if you need more information or anything is not clear.

Thank you.

>Solution :

df = df.set_index('Country Name')