大佬们，为什么运行完毕后像图片上一样，按键盘也没反应，下面也没报错

Question

import math
import pygame,sys
from pygame.locals import *
pygame.init()

screen = pygame.display.set_mode((600,500))
pygame.display.set_caption("The Pie Game = Press 1,2,3,4")#设置当前窗口的标题栏
myfont = pygame.font.Font(None,60)


color = 200,80,60
width = 4
x = 300
y = 250
radius = 200
position = x-radius,y-radius,radius*2,radius*2

piece1 = True
piece2 = False
piece3 = False
piece4 = False

#clear the screen
screen.fill((200,200,200))#填充背景颜色


while True:
	for event in pygame.event.get():
		if event.type == QUIT:#按下关闭按钮窗口关闭
			sys.exit()	
		if event.type == KEYUP:#先判断event类型再进行使用（https://segmentfault.com/q/1010000012828917）
			if event.key ==pygame.K_ESCAPE:
				sys.exit()
			elif event.key == pygame.K_1:
				piece1 = True
			elif event.key == pygame.K_2:
				piece2 = True
			elif event.key == pygame.K_3:
				piece3 = True
			elif event.key == pygame.K_4:
				piece4 = True



#draw the four screen
textImg1 = myfont.render("1",True,color)
screen.blit(textImg1,(x+radius/2-20,y-radius/2))
textImg1 = myfont.render("2",True,color)
screen.blit(textImg1,(x-radius/2,y-radius/2))
textImg1 = myfont.render("3",True,color)
screen.blit(textImg1,(x-radius/2,y+radius/2-20))
textImg1 = myfont.render("4",True,color)
screen.blit(textImg1,(x+radius/2-20,y+radius/2-20))


#should the pieces be drawn?
if piece1:
	start_angle = math.radians(0)
	end_angle = math.radians(90)
	pygame.draw.arc(screen,color,position,start_angle,end_angle,width)
	pygame.draw.line(screen,color,(x,y),(x,y-radius),width)
	pygame.draw.line(screen,color,(x,y),(x+radius,y),width)
if piece2:
	start_angle = math.radians(90)
	end_angle = math.radians(180)
	pygame.draw.arc(screen,color,position,start_angle,end_angle,width)
	pygame.draw.line(screen,color,(x,y),(x,y-radius),width)
	pygame.draw.line(screen,color,(x,y),(x-radius,y),width)
if piece3:
	start_angle = math.radians(180)
	end_angle = math.radians(270)
	pygame.draw.arc(screen,color,position,start_angle,end_angle,width)
	pygame.draw.line(screen,color,(x,y),(x-radius,y),width)
	pygame.draw.line(screen,color,(x,y),(x,y+radius),width)
if piece4:
	start_angle = math.radians(270)
	end_angle = math.radians(360)
	pygame.draw.arc(screen,color,position,start_angle,end_angle,width)
	pygame.draw.line(screen,color,(x,y),(x,y+radius),width)
	pygame.draw.line(screen,color,(x,y),(x+radius,y),width)


#is the pie finished?
if piece1 and piece2 and piece3 and piece4:
	color = 0,255,0

pygame.display.update()#更新用户显示窗口

 

Answer 1

import math
import pygame, sys
from pygame.locals import *

pygame.init()

screen = pygame.display.set_mode((600, 500))
pygame.display.set_caption("The Pie Game = Press 1,2,3,4")  # 设置当前窗口的标题栏
myfont = pygame.font.Font(None, 60)

color = 200, 80, 60
width = 4
x = 300
y = 250
radius = 200
position = x - radius, y - radius, radius * 2, radius * 2

piece1 = True
piece2 = False
piece3 = False
piece4 = False

# clear the screen
screen.fill((200, 200, 200))  # 填充背景颜色

while True:
	for event in pygame.event.get():
		if event.type == QUIT:  # 按下关闭按钮窗口关闭
			sys.exit()
		if event.type == KEYUP:  # 先判断event类型再进行使用（https://segmentfault.com/q/1010000012828917）
			if event.key == pygame.K_ESCAPE:
				sys.exit()
			elif event.key == pygame.K_1:
				piece1 = True
			elif event.key == pygame.K_2:
				piece2 = True
			elif event.key == pygame.K_3:
				piece3 = True
			elif event.key == pygame.K_4:
				piece4 = True

	# draw the four screen
	textImg1 = myfont.render("1", True, color)
	screen.blit(textImg1, (x + radius / 2 - 20, y - radius / 2))
	textImg1 = myfont.render("2", True, color)
	screen.blit(textImg1, (x - radius / 2, y - radius / 2))
	textImg1 = myfont.render("3", True, color)
	screen.blit(textImg1, (x - radius / 2, y + radius / 2 - 20))
	textImg1 = myfont.render("4", True, color)
	screen.blit(textImg1, (x + radius / 2 - 20, y + radius / 2 - 20))

	# should the pieces be drawn?
	if piece1:
		start_angle = math.radians(0)
		end_angle = math.radians(90)
		pygame.draw.arc(screen, color, position, start_angle, end_angle, width)
		pygame.draw.line(screen, color, (x, y), (x, y - radius), width)
		pygame.draw.line(screen, color, (x, y), (x + radius, y), width)
	if piece2:
		start_angle = math.radians(90)
		end_angle = math.radians(180)
		pygame.draw.arc(screen, color, position, start_angle, end_angle, width)
		pygame.draw.line(screen, color, (x, y), (x, y - radius), width)
		pygame.draw.line(screen, color, (x, y), (x - radius, y), width)
	if piece3:
		start_angle = math.radians(180)
		end_angle = math.radians(270)
		pygame.draw.arc(screen, color, position, start_angle, end_angle, width)
		pygame.draw.line(screen, color, (x, y), (x - radius, y), width)
		pygame.draw.line(screen, color, (x, y), (x, y + radius), width)
	if piece4:
		start_angle = math.radians(270)
		end_angle = math.radians(360)
		pygame.draw.arc(screen, color, position, start_angle, end_angle, width)
		pygame.draw.line(screen, color, (x, y), (x, y + radius), width)
		pygame.draw.line(screen, color, (x, y), (x + radius, y), width)

	# is the pie finished?
	if piece1 and piece2 and piece3 and piece4:
		color = 0, 255, 0

	pygame.display.update()  # 更新用户显示窗口