Function to get & update Price Book discounts

Function to get & update Price Book discounts

I want to access the discount levels using the following function.  It shows the price book fields correctly, but doesn't show the discount info or the associated products info. 

PriceBookData = zoho.crm.getRecordById("PriceBooks", input.PriceBookID);
info PriceBookData;

How to read and write price book discounts using deluge script?

Thanks.