move the player

blocks3.py

import pygame
import random
 
BLACK = (  0,   0,   0)
WHITE = (255, 255, 255)
RED   = (255,   0,   0)
 
class Block(pygame.sprite.Sprite):

    def __init__(self, color, width, height):
 
        super(Block, self).__init__()
 
        self.image = pygame.Surface([width, height])
        self.image.fill(color)
 
        self.rect = self.image.get_rect()
 
pygame.init()
 
screen_width = 700
screen_height = 400
screen = pygame.display.set_mode([screen_width, screen_height])
 
all_sprites_list = pygame.sprite.Group()
clock = pygame.time.Clock()
 
for i in range(10):
    # This represents a block
    block = Block(BLACK, 20, 15)
 
    # Set a random location for the block
    block.rect.x = random.randrange(screen_width)
    block.rect.y = random.randrange(screen_height)
 
    all_sprites_list.add(block)

# Create a RED player block
player = Block(RED, 20, 15)
all_sprites_list.add(player)

done = False
# -------- Main Program Loop -----------
while not done:
    for event in pygame.event.get(): 
        if event.type == pygame.QUIT: 
            done = True
            
    pos = pygame.mouse.get_pos()
    player.rect.x = pos[0]
    player.rect.y = pos[1]
    
    # Clear the screen
    screen.fill(WHITE)
 
    # Draw all the spites
    all_sprites_list.draw(screen)
 
    # Go ahead and update the screen with what we've drawn.
    pygame.display.flip()
 
    # Limit to 60 frames per second
    clock.tick(60)
 
pygame.quit()