What kind of Python assignment is this called?

Question

I saw this in a Pygame tutorial:

size = width, height = 600,400
screen = pygame.display.set_mode(size)

I understand width, height being set to 600, 400 respectively, but what is size? That's one variable. Thanks.

Answer 1

size is assigned the tuple (600,400).

>>> size = width, height = 600,400
>>> size
(600, 400)
>>> width
600
>>> height
400