apply anonymous function on the index of dataFrame

Question

I want to apply a anonymous function (using .apply()) like lambda x: x + 1 on indexes of dataframes (not on the columns) how can I do it?

Answer 1

One way would be:

df.set_index(df.index + 1)

another:

df.assign(index=lambda x: x.index+1).set_index('index')