How do I draw a rectangle in a Pygame window using Python?

How to Draw a Rectangle in Pygame

Drawing a rectangle in Python using the Pygame library is essential for many game development tasks. In this question, we'll explore the specific steps involved in drawing a rectangle for Python 3.2.

In the provided Python code:

<code class="python">import pygame, sys
from pygame.locals import *

def main():
    pygame.init()

    DISPLAY = pygame.display.set_mode((500, 400), 0, 32)

    WHITE = (255, 255, 255)
    BLUE = (0, 0, 255)

    DISPLAY.fill(WHITE)

    pygame.draw.rect(DISPLAY, BLUE, (200, 150, 100, 50))

    while True:
        for event in pygame.event.get():
            if event.type == QUIT:
                pygame.quit()
                sys.exit()
        pygame.display.update()

if __name__ == "__main__":
    main()</code>

1. Initialize Pygame: The pygame.init() function initializes the Pygame library.
2. Create a Game Window: pygame.display.set_mode((500, 400), 0, 32) creates a game window with a resolution of 500x400 pixels.
3. Fill the Window: DISPLAY.fill(WHITE) fills the window with the specified color, in this case, white.
4. Draw a Rectangle: pygame.draw.rect(DISPLAY, BLUE, (200, 150, 100, 50)) draws a rectangle using the DISPLAY surface, the color BLUE, and the coordinates (200, 150) as the top-left corner and (100, 50) as the width and height.
5. Game Loop: The main game loop handles events and updates the display. When the quit event is detected, pygame.quit() and sys.exit() are called to cleanly exit the game.

This code demonstrates how to draw a simple blue rectangle in a Pygame window. For more information and tutorials on using Pygame, refer to the Pygame website: www.pygame.org.

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