python 贪吃蛇小游戏代码

#!/usr/bin/python# -*- coding: UTF-8 -*-#作者：黄哥#链接：https://www.zhihu.com/question/55873159/answer/146647646#来源：知乎#著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。import randomimport pygameimport sysfrom pygame.locals import *Snakespeed = 17Window_Width = 800Window_Height = 500Cell_Size = 20  # Width and height of the cells# Ensuring that the cells fit perfectly in the window. eg if cell size was# 10     and window width or windowheight were 15 only 1.5 cells would# fit.assert Window_Width % Cell_Size == 0, "Window width must be a multiple of cell size."# Ensuring that only whole integer number of cells fit perfectly in the window.assert Window_Height % Cell_Size == 0, "Window height must be a multiple of cell size."Cell_W = int(Window_Width / Cell_Size)  # Cell WidthCell_H = int(Window_Height / Cell_Size)  # Cellc HeightWhite = (255, 255, 255)Black = (0, 0, 0)Red = (255, 0, 0)  # Defining element colors for the PRogram.Green = (0, 255, 0)DARKGreen = (0, 155, 0)DARKGRAY = (40, 40, 40)YELLOW = (255, 255, 0)Red_DARK = (150, 0, 0)BLUE = (0, 0, 255)BLUE_DARK = (0, 0, 150)BGCOLOR = Black  # Background colorUP = 'up'DOWN = 'down'      # Defining keyboard keys.LEFT = 'left'RIGHT = 'right'HEAD = 0  # Syntactic sugar: index of the snake's headdef main():    global SnakespeedCLOCK, DISPLAYSURF, BASICFONT    pygame.init()    SnakespeedCLOCK = pygame.time.Clock()    DISPLAYSURF = pygame.display.set_mode((Window_Width, Window_Height))    BASICFONT = pygame.font.Font('freesansbold.ttf', 18)    pygame.display.set_caption('Snake')    showStartScreen()    while True:        runGame()        showGameOverScreen()def runGame():    # Set a random start point.    startx = random.randint(5, Cell_W - 6)    starty = random.randint(5, Cell_H - 6)    wormCoords = [{'x': startx, 'y': starty},                  {'x': startx - 1, 'y': starty},                  {'x': startx - 2, 'y': starty}]    direction = RIGHT    # Start the apple in a random place.    apple = getRandomLocation()    while True:  # main game loop        for event in pygame.event.get():  # event handling loop            if event.type == QUIT:                terminate()            elif event.type == KEYDOWN:                if (event.key == K_LEFT) and direction != RIGHT:                    direction = LEFT                elif (event.key == K_RIGHT) and direction != LEFT:                    direction = RIGHT                elif (event.key == K_UP) and direction != DOWN:                    direction = UP                elif (event.key == K_DOWN) and direction != UP:                    direction = DOWN                elif event.key == K_ESCAPE:                    terminate()        # check if the Snake has hit itself or the edge        if wormCoords[HEAD]['x'] == -1 or wormCoords[HEAD]['x'] == Cell_W or wormCoords[HEAD]['y'] == -1 or wormCoords[HEAD]['y'] == Cell_H:            return  # game over        for wormBody in wormCoords[1:]:            if wormBody['x'] == wormCoords[HEAD]['x'] and wormBody['y'] == wormCoords[HEAD]['y']:                return  # game over        # check if Snake has eaten an apply        if wormCoords[HEAD]['x'] == apple['x'] and wormCoords[HEAD]['y'] == apple['y']:            # don't remove worm's tail segment            apple = getRandomLocation()  # set a new apple somewhere        else:            del wormCoords[-1]  # remove worm's tail segment        # move the worm by adding a segment in the direction it is moving        if direction == UP:            newHead = {'x': wormCoords[HEAD]['x'],                       'y': wormCoords[HEAD]['y'] - 1}        elif direction == DOWN:            newHead = {'x': wormCoords[HEAD]['x'],                       'y': wormCoords[HEAD]['y'] + 1}        elif direction == LEFT:            newHead = {'x': wormCoords[HEAD][                'x'] - 1, 'y': wormCoords[HEAD]['y']}        elif direction == RIGHT:            newHead = {'x': wormCoords[HEAD][                'x'] + 1, 'y': wormCoords[HEAD]['y']}        wormCoords.insert(0, newHead)        DISPLAYSURF.fill(BGCOLOR)        drawGrid()        drawWorm(wormCoords)        drawApple(apple)        drawScore(len(wormCoords) - 3)        pygame.display.update()        SnakespeedCLOCK.tick(Snakespeed)def drawPressKeyMsg():    pressKeySurf = BASICFONT.render('Press a key to play.', True, White)    pressKeyRect = pressKeySurf.get_rect()    pressKeyRect.topleft = (Window_Width - 200, Window_Height - 30)    DISPLAYSURF.blit(pressKeySurf, pressKeyRect)def checkForKeyPress():    if len(pygame.event.get(QUIT)) > 0:        terminate()    keyUpEvents = pygame.event.get(KEYUP)    if len(keyUpEvents) == 0:        return None    if keyUpEvents[0].key == K_ESCAPE:        terminate()    return keyUpEvents[0].keydef showStartScreen():    titleFont = pygame.font.Font('freesansbold.ttf', 100)    titleSurf1 = titleFont.render('Snake!', True, White, DARKGreen)    degrees1 = 0    degrees2 = 0    while True:        DISPLAYSURF.fill(BGCOLOR)        rotatedSurf1 = pygame.transform.rotate(titleSurf1, degrees1)        rotatedRect1 = rotatedSurf1.get_rect()        rotatedRect1.center = (Window_Width / 2, Window_Height / 2)        DISPLAYSURF.blit(rotatedSurf1, rotatedRect1)        drawPressKeyMsg()        if checkForKeyPress():            pygame.event.get()  # clear event queue            return        pygame.display.update()        SnakespeedCLOCK.tick(Snakespeed)        degrees1 += 3  # rotate by 3 degrees each frame        degrees2 += 7  # rotate by 7 degrees each framedef terminate():    pygame.quit()    sys.exit()def getRandomLocation():    return {'x': random.randint(0, Cell_W - 1), 'y': random.randint(0, Cell_H - 1)}def showGameOverScreen():    gameOverFont = pygame.font.Font('freesansbold.ttf', 100)    gameSurf = gameOverFont.render('Game', True, White)    overSurf = gameOverFont.render('Over', True, White)    gameRect = gameSurf.get_rect()    overRect = overSurf.get_rect()    gameRect.midtop = (Window_Width / 2, 10)    overRect.midtop = (Window_Width / 2, gameRect.height + 10 + 25)    DISPLAYSURF.blit(gameSurf, gameRect)    DISPLAYSURF.blit(overSurf, overRect)    drawPressKeyMsg()    pygame.display.update()    pygame.time.wait(500)    checkForKeyPress()  # clear out any key presses in the event queue    while True:        if checkForKeyPress():            pygame.event.get()  # clear event queue            returndef drawScore(score):    scoreSurf = BASICFONT.render('Score: %s' % (score), True, White)    scoreRect = scoreSurf.get_rect()    scoreRect.topleft = (Window_Width - 120, 10)    DISPLAYSURF.blit(scoreSurf, scoreRect)def drawWorm(wormCoords):    for coord in wormCoords:        x = coord['x'] * Cell_Size        y = coord['y'] * Cell_Size        wormSegmentRect = pygame.Rect(x, y, Cell_Size, Cell_Size)        pygame.draw.rect(DISPLAYSURF, DARKGreen, wormSegmentRect)        wormInnerSegmentRect = pygame.Rect(            x + 4, y + 4, Cell_Size - 8, Cell_Size - 8)        pygame.draw.rect(DISPLAYSURF, Green, wormInnerSegmentRect)def drawApple(coord):    x = coord['x'] * Cell_Size    y = coord['y'] * Cell_Size    appleRect = pygame.Rect(x, y, Cell_Size, Cell_Size)    pygame.draw.rect(DISPLAYSURF, Red, appleRect)def drawGrid():    for x in range(0, Window_Width, Cell_Size):  # draw vertical lines        pygame.draw.line(DISPLAYSURF, DARKGRAY, (x, 0), (x, Window_Height))    for y in range(0, Window_Height, Cell_Size):  # draw horizontal lines        pygame.draw.line(DISPLAYSURF, DARKGRAY, (0, y), (Window_Width, y))if __name__ == '__main__':    try:        main()    except SystemExit:        pass
start
game over