pygame error in my clicker game

[Windspar]

After you get use to python. Learn Classes. 99% of everything in python is an object.
Here an example.

import pygame
pygame.init()

def create_button(font, text, text_color, color, rect):
    # Use the pygame Rect.
    rect = pygame.Rect(rect)
    surface = pygame.Surface(rect.size)
    surface.fill(color)

    center = rect.centerx - rect.x, rect.centery - rect.y
    text_image = font.render(text, 1, text_color)
    text_rect = text_image.get_rect(center=center)
    surface.blit(text_image, text_rect)

    return surface, rect

def main():
    pygame.display.set_caption("Button Example")
    display = pygame.display.set_mode((800, 600))
    clock = pygame.time.Clock()
    fps = 60

    font20 = pygame.font.Font(None, 20)
    font50 = pygame.font.Font(None, 50)

    # Button will be a tuple. (image, rect)
    button = create_button(font20, "MyButton", pygame.Color("grey50"), pygame.Color("grey70"), (50, 50, 150, 30))

    # Create your text. Then render it. This is a tuple. (text_image, position)
    clicky_click = font50.render("Clicky Click", 1, pygame.Color("white")), (400, 100)

    running = True
    while running:
        for event in pygame.event.get():
            if event.type == pygame.MOUSEBUTTONDOWN:
                if event.button == 1:
                    if button[1].collidepoint(event.pos):
                        print("You push my buttons")
            elif event.type == pygame.QUIT:
                running = False

        display.fill(pygame.Color('black')
        display.blit(button[0], button[1])
        display.blit(clicky_click[0], clicky_click[1])
        pygame.display.update()
        # Idle/Sleep
        clock.tick(fps)

main()