为什么我的恐龙不会跳？？？

import pygame  # 导入pygame模块
from pygame.locals import *  # 导入pygame中常量
from itertools import cycle  # 导入迭代工具

SCREENWIDTH = 640  # 屏幕宽度
SCREENHEIGHT = 230  # 屏幕高度

FPS = 30  # 更新画面的时间


# 定义一个地图类
class MyMap():
    # 加载背景
    def __init__(self, x, y):
        self.bg = pygame.image.load("image/bg.png")
        self.x = x
        self.y = y

    def map_rolling(self):
        if self.x < -790:  # 小于-790说明地图已经完全移动完毕
            self.x = 800  # 给图一个新的坐标点
        else:
            self.x -= 5  # 5个像素向左移动

    # 更新地图
    def map_update(self):
        SCREEN.blit(self.bg, (self.x, self.y))

    # 恐龙类


class Dinosaur():
    def __init__(self):
        # 初始化小恐龙矩形
        self.rect = pygame.Rect(0, 0, 0, 0)
        self.jumpState = False  # 跳跃的状态
        self.jumpHeight = 140  # 跳跃的高度
        self.lowest_y = 140  # 最低坐标
        self.jumpValue = 0  # 跳跃增变量
        self.dinosaurIndex = 0
        self.dinosaurIndexGen = cycle([0, 1, 2])
        # 加载小恐龙图片
        self.dinosaur_img = (pygame.image.load("image/dinosaur1.png").convert_alpha(),
                             pygame.image.load("image/dinosaur2.png").convert_alpha(),
                             pygame.image.load("image/dinosaur3.png").convert_alpha(),)
        self.jump_audio = pygame.mixer.Sound("audio/jump.wav")  # 加载跳跃音效
        self.rect.size = self.dinosaur_img[0].get_size()
        self.x = 50  # 绘制小恐龙的x坐标
        self.y = self.lowest_y  # 绘制小恐龙的y坐标
        self.rect.topleft = (self.x, self.y)  # 矩形左上角为准

        # 跳跃

    def jump(self):
        self.jumpState = True

        # 小恐龙的移动

    def move(self):
        if self.jumpState:  # 可以起跳
            if self.rect.y >= self.lowest_y:
                self.jumpValue = -5  # 以5个像素向上移动
            if self.rect.y <= self.lowest_y-self.jumpHeight:
                self.jumpValue = 5  # 以5个想素向下移动
                self.rect.y += self.jumpValue  # 通过循环改变恐龙的坐标
            if self.rect.y >= self.lowest_y:  # 小恐龙回到地面
                self.jumpState = False  # 关闭跳跃状态

    # 绘制恐龙
    def draw_dinosaur(self):
        # 匹配恐龙动图
        dinosaurIndex = next(self.dinosaurIndexGen)
        # 实现绘制
        SCREEN.blit(self.dinosaur_img[dinosaurIndex], (self.x, self.rect.y))


def mainGame():
    score = 0  # 记录得分
    over = False
    global SCREEN, FPSCLOCK
    pygame.init()  # 初始化pygame
    FPSCLOCK = pygame.time.Clock()  # 刷新屏幕的时间锁
    SCREEN = pygame.display.set_mode((SCREENWIDTH, SCREENHEIGHT))  # 设置屏幕的大小
    pygame.display.set_caption("小恐龙")  # 设置主窗体
    bg1 = MyMap(0, 0)  # 地图1
    bg2 = MyMap(800, 0)  # 地图2
    # 创建恐龙对象
    dinosaur = Dinosaur()
    while True:
        # 判断是否单击了关闭窗口
        for event in pygame.event.get():
            if event.type == QUIT:
                over = True
                exit()  # 关闭窗体
                # 判断按下空格键时
                if event.type == KEYDOWN and event.key == K_SPACE:
                    if dinosaur.rect.y >= dinosaur.lowest_y:  # 如果恐龙在地面上
                        dinosaur.jump()  # 开启跳跃状态
                        dinosaur.jump_audio.play()  # 播放恐龙跳跃时音效
        if over == False:
            bg1.map_update()  # 绘制地图起到更新地图的作用
            # 地图移动
            bg1.map_rolling()
            bg2.map_update()
            bg2.map_rolling()
            dinosaur.move()  # 移动恐龙
            # 绘制恐龙
            dinosaur.draw_dinosaur()
        pygame.display.update()  # 更新整个窗口
        FPSCLOCK.tick(FPS)  # 多久更新一次


if __name__ == '__main__':  # 创建程序入口
    mainGame()  # 调用主函数

根据您提供的代码，发现恐龙不会跳的原因是因为事件处理的代码放在了错误的位置。
在您的代码中，事件处理代码被放置在了一个错误的缩进级别，导致它不会被正确执行。
请将事件处理的代码调整到正确的位置，使其位于主循环的正确缩进级别下。以下是修复后的代码供您参考：

import pygame
from pygame.locals import *
from itertools import cycle

SCREENWIDTH = 640
SCREENHEIGHT = 230

FPS = 30

class MyMap():
    def __init__(self, x, y):
        self.bg = pygame.image.load("image/bg.png")
        self.x = x
        self.y = y

    def map_rolling(self):
        if self.x < -790:
            self.x = 800
        else:
            self.x -= 5

    def map_update(self):
        SCREEN.blit(self.bg, (self.x, self.y))

class Dinosaur():
    def __init__(self):
        self.rect = pygame.Rect(0, 0, 0, 0)
        self.jumpState = False
        self.jumpHeight = 140
        self.lowest_y = 140
        self.jumpValue = 0
        self.dinosaurIndex = 0
        self.dinosaurIndexGen = cycle([0, 1, 2])
        self.dinosaur_img = (
            pygame.image.load("image/dinosaur1.png").convert_alpha(),
            pygame.image.load("image/dinosaur2.png").convert_alpha(),
            pygame.image.load("image/dinosaur3.png").convert_alpha(),
        )
        self.jump_audio = pygame.mixer.Sound("audio/jump.wav")
        self.rect.size = self.dinosaur_img[0].get_size()
        self.x = 50
        self.y = self.lowest_y
        self.rect.topleft = (self.x, self.y)

    def jump(self):
        self.jumpState = True

    def move(self):
        if self.jumpState:
            if self.rect.y >= self.lowest_y:
                self.jumpValue = -5
            if self.rect.y <= self.lowest_y - self.jumpHeight:
                self.jumpValue = 5
            self.rect.y += self.jumpValue
            if self.rect.y >= self.lowest_y:
                self.jumpState = False

    def draw_dinosaur(self):
        dinosaurIndex = next(self.dinosaurIndexGen)
        SCREEN.blit(self.dinosaur_img[dinosaurIndex], (self.x, self.rect.y))


def mainGame():
    score = 0
    over = False
    global SCREEN, FPSCLOCK
    pygame.init()
    FPSCLOCK = pygame.time.Clock()
    SCREEN = pygame.display.set_mode((SCREENWIDTH, SCREENHEIGHT))
    pygame.display.set_caption("小恐龙")
    bg1 = MyMap(0, 0)
    bg2 = MyMap(800, 0)
    dinosaur = Dinosaur()
    while True:
        for event in pygame.event.get():
            if event.type == QUIT:
                over = True
                exit()
            if event.type == KEYDOWN and event.key == K_SPACE:
                if dinosaur.rect.y >= dinosaur.lowest_y:
                    dinosaur.jump()
                    dinosaur.jump_audio.play()
        
        if over == False:
            bg1.map_update()
            bg1.map_rolling()
            bg2.map_update()
            bg2.map_rolling()
            dinosaur.move()
            dinosaur.draw_dinosaur()
        
        pygame.display.update()
        FPSCLOCK.tick(FPS)


if __name__ == '__main__':
    mainGame()