Tetris Code

import pygame
from random import randint
from inspect import currentframe, getframeinfo

class Block(pygame.sprite.Sprite):
    def __init__(self, blocks):
        super().__init__()

        self.random_block = randint(1,7)

        self.image = blocks[self.random_block]
        self.image = pygame.transform.scale(self.image,(self.image.get_width()*.4, self.image.get_height()*.4))
        self.rect = self.image.get_rect()
        self.rect.topleft = (300,0)
        self.mask = pygame.mask.from_surface(self.image)

    def replace(self, block_colours):
        image_pixel_array = pygame.PixelArray(self.image)
        colour = block_colours[self.random_block]
        image_pixel_array.replace(colour,(0,0,0))
        del image_pixel_array



    def handle_keys(self, board_s, block, unactive_blocks):
        keys = pygame.key.get_pressed()
        if keys[pygame.K_LEFT] or keys[pygame.K_a]:
            if self.rect.left - 60 >= 0:
                self.replace(block_colours)
                self.rect.x -= 60
                self.draw(block_group, board_s)
        elif keys[pygame.K_RIGHT] or keys[pygame.K_d]:
            if self.rect.right + 60 <= 600:
                self.replace(block_colours)
                self.rect.x += 60
                self.draw(block_group, board_s)
        elif keys[pygame.K_UP] or keys[pygame.K_w]:
            self.replace(block_colours)
            topleft = self.rect.topleft
            self.image = pygame.transform.rotate(self.image, 90)
            self.rect = self.image.get_rect()
            self.rect.topleft = topleft
            self.mask = pygame.mask.from_surface(self.image)
            self.draw(block_group, board_s)
        elif keys[pygame.K_DOWN] or keys[pygame.K_s]:
            if self.rect.bottom + 60 <= 1200:
                self.replace(block_colours)
                self.rect.y += 60
                if pygame.sprite.spritecollide(block,unactive_blocks,False,pygame.sprite.collide_mask):
                    self.rect.y -= 60
                    block_sprite(blocks, block)
                self.draw(block_group, board_s)
            else:
                block_sprite(blocks, block)

    def move_every_second(self, block, unactive_blocks):
        if self.rect.bottom + 60 <= 1200:
            self.replace(block_colours)
            self.rect.y += 60
            if pygame.sprite.spritecollide(block,unactive_blocks,False,pygame.sprite.collide_mask):
                self.rect.y -= 60
                block_sprite(blocks, block)
            self.draw(block_group, board_s)
        else:
            block_sprite(blocks, block)

    def draw(self, block_group, board_s):
        print(self.rect.x,self.rect.y)
        block_group.draw(board_s)


pygame.init()

pygame.display.set_caption('Tetris')
screen = pygame.display.set_mode((720,1280))
board_s = pygame.Surface((600,1200))
screen.fill((0,0,0))
board_s.fill((0,0,0))


blocks = {
    1: pygame.image.load('O.png').convert_alpha(),
    2: pygame.image.load('I.png').convert_alpha(),
    3: pygame.image.load('S.png').convert_alpha(),
    4: pygame.image.load('Z.png').convert_alpha(),
    5: pygame.image.load('L.png').convert_alpha(),
    6: pygame.image.load('J.png').convert_alpha(),
    7:pygame.image.load('T.png')}

block_colours = {
    1: (0,136,255),
    2: (0,255,64),
    3: (208,0,255),
    4: (0,4,255),
    5: (255,106,0),
    6: (102,0,255),
    7: (255,0,42)
}

unactive_blocks = pygame.sprite.Group()


def block_sprite(blocks, unactive_block):
    if unactive_block != 0:
        unactive_blocks.add(unactive_block)
    global block, block_group
    block = Block(blocks)
    block_group = pygame.sprite.Group()
    block_group.add(block)
    return unactive_blocks
block_sprite(blocks, 0)

block.draw(block_group, board_s)


MOVE_EVERY_SECOND = pygame.USEREVENT
pygame.time.set_timer(MOVE_EVERY_SECOND, 1000)
clock = pygame.time.Clock()
while True:
    for event in pygame.event.get():

        if event.type == pygame.QUIT:
            pygame.quit()
            exit()

        if event.type == MOVE_EVERY_SECOND:
            block.move_every_second(block, unactive_blocks)

    block.handle_keys(board_s, block, unactive_blocks)

    screen.blit(board_s,(0,80))

    pygame.display.flip()

    ticks = clock.tick(60)