修复UnboundLocalError：在python / pygame中分配错误之前引用了局部变量'click'吗？

如何解决修复UnboundLocalError：在python / pygame中分配错误之前引用了局部变量'click'吗？

请帮助我解决此错误：UnboundLocalError：分配前已引用本地变量“ click” 我是pygame的新手，正在学习使用pygame编写游戏代码。我正在尝试为我的游戏创建一个包含两个按钮的主菜单：play_button和stats_button。播放按钮将运行尚未编码的game（）函数。统计按钮将显示排行榜和其他内容。但是，它没有按预期进行。当我单击第一个红色按钮（播放按钮）时，它仍在主屏幕上且无任何响应。与统计按钮相同。另外，“ X”现在不会关闭游戏窗口。另外，现在我的问题中出现了错误！

代码：

#importing area
import pygame,sys
from pygame.locals import *
#---------------------------------------------------------------------------\

#switching on
pygame.init()

#---------------------------------------------------------------------------\

#on screen area
screen = pygame.display.set_mode((600,600))
pygame.display.set_caption("space.io")
icon_game = pygame.image.load(r"C:\Uv Pygame\code\ufo.png") #load icon,r is compulsory
pygame.display.set_icon(icon_game)
background_1 = pygame.image.load(r"C:\Uv Pygame\code\bg.jpg")

#----------------------------------------------------------------------------\

#essentials
run = True
game = False
stats = False
font = pygame.font.SysFont(None,100)
click = False

#----------------------------------------------------------------------------\

#time
clock = pygame.time.Clock()

#-----------------------------------------------------------------------------\

#core

def game():
        game = True
        while game:
                screen.fill((255,255,255))
                draw_text("GAME",font,(0,0),screen,195,80)
                for event in pygame.event.get():
                        if event.type == KEYDOWN:
                                if event.key == K_ESCAPE:
                                        game = False
def stats():
        stats = True
        while stats:
                screen.fill((255,255))
                draw_text("STATS",80)
                for event in pygame.event.get():
                        if event.type == KEYDOWN:
                                if event.key == K_ESCAPE:
                                        stats = False
                
        
def draw_text(text,color,surface,x,y):
        textobj = font.render(text,1,color)
        textrect = textobj.get_rect()
        textrect.topleft = (x,y)
        surface.blit(textobj,textrect)
        

#------------------------------------------------------------------------------\        

def main_menu():
        while run:
                screen.fill((255,255))
                draw_text("HOME",80)
                        
                play_button  = pygame.Rect(210,200,180,50)
                stats_button  = pygame.Rect(210,300,50)
                pygame.draw.rect(screen,(255,play_button)
                pygame.draw.rect(screen,stats_button)
                
                mx,my = pygame.mouse.get_pos()
                
                if play_button.collidepoint((mx,my)):
                        if click:
                                game()
                if stats_button.collidepoint((mx,my)):
                        if click:
                                stats()
                        
                for event in pygame.event.get():
                        if event.type == QUIT:
                                pygame.quit()
                                sys.exit()
                        if event.type == MOUSEBUTTONDOWN:
                                if event.button == 1:
                                        click = True

                        
                pygame.display.update()
                           
main_menu()
               

错误：

Traceback (most recent call last):
  File "C:\Uv Pygame\code\pract_1.py",line 95,in <module>
    main_menu()
  File "C:\Uv Pygame\code\pract_1.py",line 78,in main_menu
    if click:
UnboundLocalError: local variable 'click' referenced before assignment

请告诉我为什么会出现此错误以及如何解决“最简单的方法” *