I am creating a game. I wrote this code to create a sprite and its hitbox:

hg = pygame.image.load('hgrd1copy.jpg').set_colorkey(red)
hgbox = pygame.Rect(0 ,13 ,36 ,72)
pygame.Surface.blit(hg, hgbox)

I had originally put

windowSurface.blit(hg, hgbox)

but then I got an error telling me that my argument needed to be pygame.Surface not none.

However, when I changed the code to pygame.Surface.blit, it gives me this error code: TypeError: descriptor 'blit' requires a 'pygame.Surface' object but received a 'NoneType' What do I do?

As explained in the commemts - y9u have to load your image in one line of code, and in another line call the set_colorkey method on the image read. And them, blit should be called as a method from an existing surface - not from the Surface class. (With the code as it is now in the question, how would the program "know" where to blit the image to?

So, assuming your screen is on the windowSurface variable you describe, this should work:

hg = pygame.image.load('hgrd1copy.jpg')
hg.set_colorkey(red)
hgbox = pygame.Rect(0, 13, 36, 72)
windowSurface.blit(hg, hgbox)