Drawing squares with Pygame; draw method only takes integers?

Question

I am trying to draw some black squares on a white screen using Pygame. Here is my problem using the pygame.draw.rect() method:

pygame.draw.rect(screen, BLACK, (10, 10, 10, 10), 0) #no error

But I actually have lots of black square to plot so I want something like this:

a1 = (10, 10, 10, 10)
a2 = (20, 20, 10, 10)
A = [a1, a2]
for i in A:
   pygame.draw.rect(screen, BLACK, A[i], 0) #gives error

TypeError: list indices must be integers, not tuple

But if I try this I don't get an error:

pygame.draw.rect(screen, BLACK, a1, 0) #no error

Any ideas?

Answer 1

You're looping over the elements of the array (tuples) instead of the indexes of A. There are several ways to do what you want. Here are the first two I thought of:

for i,_ in enumerate(A):

for i in range(len(A)):