How to remove one or multiple bands using snappy

Hello all

I have to a band from several different products. For example, ‘band_1’ of each product needs to be merged. I have done this by (thanks to this forum):

(1) creating a ‘masterProduct’ which contains the first product (not just ‘band_1’ but the entire product),
(2) merging the ‘band_1’ of the rest of the products with ‘masterProduct’ in a for loop.

This gives me a final product which contains all the necessary bands but it also contains other bandw that I don’t need. How do I delete these unnecessary bands in python?