How to assign multiple variables one line that depend on each other in python

So I know that you can assign multiple variables in one line like so:

a, b, c = 1, 2, 3

But can you assign a variable based off of the value of another variable in one line?

Idea:

a, b, c = 1, 2, a+b

I know that the idea code doesn’t work but is there some way to replicate this in one line even if longer or weirder?

NOTE:

Using ; like below doesn’t count

a, b = 1, 2; c = a+b

Answer

Using the the walrus operator it’s possible, if a bit ugly

c = (a := 1) + (b := 2)

NOTE: Assignment expressions (the walrus operator) are only available from Python 3.8 onwards