How to set in pandas the first column and row as index?

Question

When I read in a CSV, I can say pd.read_csv(\'my.csv\', index_col=3) and it sets the third column as index.

How can I do the same if I have a pandas datafra

Answer 1

You can try this regardless of the number of rows

df = pd.read_csv('data.csv', index_col=0)