data = {'0':['Col1', 'Col1_1', 10,9,8],'1':['Col1', 'Col1_2', 10,9,8], '2':['Col2', 'Col1_1', 10,9,8],'2':['Col2', 'Col1_2', 10,9,8]} df1 = pd.DataFrame(data) I'd like to modify the code above to where the first 2 columns in the dataframe are multi-index columns? So moving "Col1" and "Col1_1" to be columns in a muli-index dataframe.
