How to copy a dict and modify it in one line of code

Question

Very often I need to create dicts that differ one from another by an item or two. Here is what I usually do:

setup1 = {\'param1\': val1, 
            \'param         


        

Answer 1

The simplest way in my opinion is something like this:

new_dict = {**old_dict, 'changed_val': value, **other_new_vals_as_dict}