python list by value not by reference

Let’s take an example a=['help', 'copyright', 'credits', 'license'] b=a b.append('XYZ') b ['help', 'copyright', 'credits', 'license', 'XYZ'] a ['help', 'copyright', 'credits', 'license', 'XYZ'] I wanted to append value in list ‘b’ but the value of list ‘a’ have also changed. I think I have little idea why its like this (python passes lists by reference). My … Read more