How to repeat the values of first column in multi-level index pivot tables

Question

I'm wondering if there is a method to repeat the value in the first layer of multi-index pivot table.

I have a code like below:

AVG = pd.pivot_table(data=df, 
                        index=['A', 'B'], 
                        values=['C', 'D', 'E'], 
                        aggfunc='mean')

the result is showing like below

A   B     C    D    E
ONE 1    
    2
    3
TWO 1
    2
    3

Is that possible to change the pivot_table code so that values in column A can be repeated as below:

A   B     C    D    E
ONE 1    
ONE 2
ONE 3
TWO 1
TWO 2
TWO 3

Thank you!!