You can do it if you really want to in 3.8 :p : def begin(*args): return args[-1] begin( func := lambda x, y: begin( z := int(input())

You can do it if you really want to in 3.8 :p : def begin(*args): return args[-1] begin( func := lambda x, y: begin( z := int(input()), x + y + z ), func(1, 2) )