Maybe more obvious, it also works the other way around. Saving you from doing [head] + body + [tail] or keeping copies of temporary arrays manipulated with appe

Maybe more obvious, it also works the other way around. Saving you from doing [head] + body + [tail] or keeping copies of temporary arrays manipulated with append and extend. arr = [head, *body, tail] Same with dictionaries, often very useful when you need to include **os.environ with modifications into a subprocess.