How to allow list append() method to return the new list

Question

I want to do something like this:

myList = [10,20,30]
yourList = myList.append (40)

Unfortunately, list append does not return the modified

Answer 1

In python 3 you may create new list by unpacking old one and adding new element:

a = [1,2,3]
b = [*a,4] # b = [1,2,3,4] 

when you do:

myList + [40]

You actually have 3 lists.