每当我尝试打开帮助部分时，我都会收到此错误：
Traceback (most recent call last):
File "C:/Users/Chris/Desktop/Paul's stuff/Paul/CpmpProject/Window.py", line 142, in <module>
game.help()
File "C:/Users/Chris/Desktop/Paul's stuff/Paul/CpmpProject/Window.py", line 76, in help
if event.type == MOUSEBUTTONDOWN:
UnboundLocalError: local variable 'event' referenced before assignment
我不知道如何解决这个问题。我有很多代码，我觉得要找到错误需要经历很多。如果您能帮助我解决此问题，我将不胜感激，我知道其他一些从事类似项目的人会很感激，他们也会遇到同样的问题。我的代码如下。我不期望任何人经历它，但我会感谢任何人愿意并找到我遇到的错误。我已经包含了所有这些，以防万一它比我预期的更远，但我认为问题出在帮助函数定义中。
import pygame, sys
from pygame.locals import *
import random
from random import shuffle
back = True
backbutton = pygame.image.load("Back button.png")
helpsection = pygame.image.load("Hunt Help section.png")
class Game():
def question(self):
questions = ["What species of bird is also a nickname for New Zealand?",
"Which Twins can you play as in Assassin's Creed Syndicate?",
"Which year was 'Killing In The Name' Christmas Number one?"]
answers = [["kiwi", "Kiwi", "Falcon", "Sparrow", "Crow"], ["frye", "Frye", "Bank", "Green", "Bundy"],
["2009", "2009",
"1999", "1993",
"2004"]]
# I had to do it in two separate lists as it's easier to work with later on
# Also I made the correct answers non-case sensitive to make it easier to test.
Game_back = True
while Game_back == True:
r = len(questions)
score = 0
s = random.randrange(0, r, 1)
# This generates a random number within the range of how many questions there are
# and then prints out that question
print(questions[s])
list = answers[s]
output = []
for i in range(1, 5):
output.append(answers[s][i])
shuffle(output)
print(output[0] + " ", output[1] + " ", output[2] + " ", output[3])
# this takes the answers that correspond with the randomly generated question and shuffles the answers
# I did this as otherwise, the answer would always be the first answer to appear and the player could exploit this
player_answer = input()
if player_answer == answers[s][0] or player_answer == answers[s][1]:
score += 1
print(score)
else:
print("Wrong")
panswer = input("Would you like to play another round?: ")
quit = ["Yes", "yes", "Yeah", "yeah"]
if panswer in quit:
Game_back = False
else:
pygame.quit()
sys.exit()
# this is the basics of the algorithm that will determine if a player can move forward or not in the maze and the score
# they will have at the end
## it takes the input from the player and compares it to the first 2 answers in the corresponding answer set which is
## a separate list from the list that is printed out to the player
def help(self):
pygame.init()
self.FPS = 60
self.fps_clock = pygame.time.Clock()
self.surface = pygame.display.set_mode((640, 480))
# This class sets the basic attributes for the window.
# The clock is set to 60 and the name of the window
# is set to The Hunt which is a working title for my project
DISPLAY_SURF.blit(helpsection, (0, 0))
DISPLAY_SURF.blit(backbutton, ((640 - 124), (480 - 87)))
if event.type == MOUSEBUTTONDOWN:
if (640 -124) >= mouse[0] > 640 and (480 - 87) >= mouse[1] > 480:
back = False
while True:
pygame.display.update()
self.fps_clock.tick(self.FPS)
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
sys.exit()
# This updates the window display to refresh every clock tick
# and to set the background colour as white
# using the RGB colours. I might use these to alter the window's look at a later date
#Initialize pygame and define colours
pygame.init()
white = 255, 255, 255
#Sets the resolution to 640 pixels by 720 pixels and caption for pygame window
DISPLAY_SURF = pygame.display.set_mode((640, 720))
pygame.display.set_caption("The Hunt!")
#Create a clock object
clock = pygame.time.Clock()
FPS = 60
#Define a variable to refer to image
background = pygame.image.load("Startermenu.png")
start = pygame.image.load("PlayGameButton.png")
help = pygame.image.load("HelpButton.png")
credits = pygame.image.load("ShowCreditsButton.png")
Hoveringhelp = pygame.image.load("HoveringHelpButton.png")
#Start main loop
while True:
for event in pygame.event.get():
mouse = pygame.mouse.get_pos()
DISPLAY_SURF.fill(white)
DISPLAY_SURF.blit(background, (0, 0))
DISPLAY_SURF.blit(start, (0, 140))
DISPLAY_SURF.blit(help, (0, 186))
DISPLAY_SURF.blit(credits, (0, 235))
pygame.display.update()
#if 0 <= mouse[0] < 260 and 180 <= mouse[1] < 230:
# DISPLAY_SURF.blit(Hoveringhelp, (0, 186))
# print("hovering over help")
#elif 0 <= mouse[0] < 260 and 235 <= mouse[1] < 270:
# print("hovering over credits")
#elif 0 <= mouse[0] < 260 and 0 <= mouse[1] < 180:
# print("hovering over play button")
if event.type == MOUSEBUTTONDOWN:
if 0 <= mouse[0] < 260 and 140 <= mouse[1] < 180:
game = Game()
game.question()
elif 0 <= mouse[0] < 260 and 180 <= mouse[1] < 230:
game = Game()
game.help()
elif 0 <= mouse[0] < 260 and 240 <= mouse[1] < 285:
game = Game()
game.credits()
elif event.type == QUIT:
pygame.quit()
sys.exit()
在help()方法中：
def help(self):
...
if event.type == MOUSEBUTTONDOWN:
...
while True:
...
for event in pygame.event.get():
event是在for循环中定义的，但您在此之前引用了它。
修复它的一种方法是在for循环内移动 if event.type == MOUSEBUTTONDOWN 语句。
或者，由于 .help() 仅从已知事件MOUSEBUTTONDOWN的底部事件循环调用，也许您可以完全删除 if 语句？
(顺便说一句，我认为错误消息很清楚;你不明白吗？