赋值前引用的局部变量 'number_dropped'
local variable 'number_dropped' referenced before assignment
我目前在 pygame 中遇到错误。当我点击我的游戏的播放按钮时，我收到一个登录错误提示：
”第 166 行，在 game_loop
number_dropped()
UnboundLocalError: 局部变量 'number_dropped' 在赋值前被引用
我目前不知道如何解决这个问题，如果有人能提供帮助，我们将不胜感激。我是 python 和编码的新手，所以请记住我没有什么经验。
- 我正在使用的应用程序是 IDLE python，版本 3.4.0
错误出现在这段代码中：
things(thing_startx, thing_starty, thing_width, thing_height, black)
thing_starty += thing_speed
basket(x,y)
things_dropped(dropped)
if x > display_width - basket_width or x < 0:
number_dropped()
if thing_starty > display_height:
thing_starty = 0 - thing_height
thing_startx = random.randrange(0,display_width)
number_dropped += 1
thing_speed += 1
thing_width += (nd * 1.2)
if y < thing_starty+thing_height:
print('y crossover')
if x > thing_startx and x < thing_startx + thing_width or x+basket_width > thing_startx and x + basket_width < thing_startx+thing_width:
print('x crossover')
number_dropped()
pygame.display.update()
clock.tick(60)
下面是完整的代码，您可能需要用它来解决问题。感谢任何回应的人以及您的时间和患者。 :D
import pygame
import time
import random
import sys
#initiates Pygame
pygame.init()
#Sets the display width and height of the GUI
display_width = 800
display_height = 600
#Shades
black = (0,0,0)
white = (255,255,255)
#Colours
red = (200,0,0)
green = (0,200,0)
blue = (0,255,0)
bright_red =(255,0,0)
bright_green = (0,255,0)
block_color = (53,115,225)
#Identification of the basket width
basket_width = 859
gameDisplay = pygame.display.set_mode((display_width,display_height))
pygame.display.set_caption('Catch the Batch')
clock = pygame.time.Clock()
basketImg = pygame.image.load('basket.png')
basketImg = pygame.transform.scale(basketImg,(100,100))
#Counter for how many objects the player has dodged
def things_dropped(count):
font = pygame.font.SysFont(None, 25)
text = font.render("Dropped: "+str(count), True, black)
gameDisplay.blit(text,(0,0))
#Defines what objects the player will have to try and catch
def things(thingx, thingy, thingw, thingh, color):
pygame.draw.rect(gameDisplay, block_color, [thingx, thingy, thingw, thingh])
def basket(x,y):
gameDisplay.blit(basketImg,(x,y))
def text_objects(text, font):
textSurface = font.render(text, True, black)
return textSurface, textSurface.get_rect()
def message_display(text):
largeText = pygame.font.Font('freesansbold.ttf',20)
TextSurf, TextRect = text_objects(text, largeText)
TextRect.center = ((display_width/2),(display_height/2))
gameDisplay.blit(TextSurf, TextRect)
pygame.display.update()
time.sleep(2)
game_loop()
#This function displays a message when you have dropped too many pinikalatas
def number_dropped():
message_display('You dropped too many Pinikalatas, Game Over!')
def button(msg,x,y,w,h,ic,ac, action = None):
mouse = pygame.mouse.get_pos()
click = pygame.mouse.get_pressed()
if x+w > mouse[0] > x and y+h > mouse [1] > y:
pygame.draw.rect(gameDisplay, ac, (x,y,w,h))
if click[0] == 1 and action != None:
action()
else:
pygame.draw.rect(gameDisplay,ic,(x,y,w,h))
smallText = pygame.font.Font("freesansbold.ttf",20)
textSurf, textRect = text_objects(msg, smallText)
textRect.center = ( (x+(w/2)), (y+(h/2)) )
gameDisplay.blit(textSurf, textRect)
def game_intro():
intro = True
while intro:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
gameDisplay.fill(white)
largeText = pygame.font.Font('freesansbold.ttf',80)
TextSurf, TextRect = text_objects("Catch the Batch", largeText)
TextRect.center = ((display_width/2),(display_height/2))
gameDisplay.blit(TextSurf, TextRect)
button("Play!",350,400,100,50,green,bright_green,game_loop)
button("X",750,0,50,50,red,bright_red,CTBquit)
pygame.display.update()
clock.tick(15)
#ctb stands for 'Catch the Batch' <-- (Title of game)
def CTBquit():
pygame.quit()
quit()
def game_loop():
x = (display_width * 0.45)
y = (display_height * 0.8)
x_change = 0
thing_startx = random.randrange(0, display_width)
thing_starty = -600
thing_speed = 7
thing_width = 100
thing_height = 100
thingCount = 1
dropped = 0
gameExit = False
while not gameExit:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
x_change = -5
elif event.key == pygame.K_RIGHT:
x_change = 5
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
x_change = 0
x += x_change
gameDisplay.fill(white)
# things(thingx, thingy, thingw, thingh, color)
things(thing_startx, thing_starty, thing_width, thing_height, black)
thing_starty += thing_speed
basket(x,y)
things_dropped(dropped)
if x > display_width - basket_width or x < 0:
number_dropped()
if thing_starty > display_height:
thing_starty = 0 - thing_height
thing_startx = random.randrange(0,display_width)
number_dropped += 1
thing_speed += 1
thing_width += (nd * 1.2)
if y < thing_starty+thing_height:
print('y crossover')
if x > thing_startx and x < thing_startx + thing_width or x+basket_width > thing_startx and x + basket_width < thing_startx+thing_width:
print('x crossover')
number_dropped()
pygame.display.update()
clock.tick(60)
game_intro()
game_loop()
pygame.quit()
quit()
我觉得名字 number_dropped 打错了。
if thing_starty > display_height:
thing_starty = 0 - thing_height
thing_startx = random.randrange(0,display_width)
number_dropped += 1 # <- the name number_dropped is conflicted with the function
thing_speed += 1
thing_width += (nd * 1.2)
我想你的意思是：
if thing_starty > display_height:
thing_starty = 0 - thing_height
thing_startx = random.randrange(0,display_width)
dropped += 1 # <----
thing_speed += 1
thing_width += (nd * 1.2)
我目前在 pygame 中遇到错误。当我点击我的游戏的播放按钮时，我收到一个登录错误提示：
”第 166 行，在 game_loop number_dropped() UnboundLocalError: 局部变量 'number_dropped' 在赋值前被引用
我目前不知道如何解决这个问题，如果有人能提供帮助，我们将不胜感激。我是 python 和编码的新手，所以请记住我没有什么经验。
- 我正在使用的应用程序是 IDLE python，版本 3.4.0
错误出现在这段代码中：
things(thing_startx, thing_starty, thing_width, thing_height, black)
thing_starty += thing_speed
basket(x,y)
things_dropped(dropped)
if x > display_width - basket_width or x < 0:
number_dropped()
if thing_starty > display_height:
thing_starty = 0 - thing_height
thing_startx = random.randrange(0,display_width)
number_dropped += 1
thing_speed += 1
thing_width += (nd * 1.2)
if y < thing_starty+thing_height:
print('y crossover')
if x > thing_startx and x < thing_startx + thing_width or x+basket_width > thing_startx and x + basket_width < thing_startx+thing_width:
print('x crossover')
number_dropped()
pygame.display.update()
clock.tick(60)
下面是完整的代码，您可能需要用它来解决问题。感谢任何回应的人以及您的时间和患者。 :D
import pygame
import time
import random
import sys
#initiates Pygame
pygame.init()
#Sets the display width and height of the GUI
display_width = 800
display_height = 600
#Shades
black = (0,0,0)
white = (255,255,255)
#Colours
red = (200,0,0)
green = (0,200,0)
blue = (0,255,0)
bright_red =(255,0,0)
bright_green = (0,255,0)
block_color = (53,115,225)
#Identification of the basket width
basket_width = 859
gameDisplay = pygame.display.set_mode((display_width,display_height))
pygame.display.set_caption('Catch the Batch')
clock = pygame.time.Clock()
basketImg = pygame.image.load('basket.png')
basketImg = pygame.transform.scale(basketImg,(100,100))
#Counter for how many objects the player has dodged
def things_dropped(count):
font = pygame.font.SysFont(None, 25)
text = font.render("Dropped: "+str(count), True, black)
gameDisplay.blit(text,(0,0))
#Defines what objects the player will have to try and catch
def things(thingx, thingy, thingw, thingh, color):
pygame.draw.rect(gameDisplay, block_color, [thingx, thingy, thingw, thingh])
def basket(x,y):
gameDisplay.blit(basketImg,(x,y))
def text_objects(text, font):
textSurface = font.render(text, True, black)
return textSurface, textSurface.get_rect()
def message_display(text):
largeText = pygame.font.Font('freesansbold.ttf',20)
TextSurf, TextRect = text_objects(text, largeText)
TextRect.center = ((display_width/2),(display_height/2))
gameDisplay.blit(TextSurf, TextRect)
pygame.display.update()
time.sleep(2)
game_loop()
#This function displays a message when you have dropped too many pinikalatas
def number_dropped():
message_display('You dropped too many Pinikalatas, Game Over!')
def button(msg,x,y,w,h,ic,ac, action = None):
mouse = pygame.mouse.get_pos()
click = pygame.mouse.get_pressed()
if x+w > mouse[0] > x and y+h > mouse [1] > y:
pygame.draw.rect(gameDisplay, ac, (x,y,w,h))
if click[0] == 1 and action != None:
action()
else:
pygame.draw.rect(gameDisplay,ic,(x,y,w,h))
smallText = pygame.font.Font("freesansbold.ttf",20)
textSurf, textRect = text_objects(msg, smallText)
textRect.center = ( (x+(w/2)), (y+(h/2)) )
gameDisplay.blit(textSurf, textRect)
def game_intro():
intro = True
while intro:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
gameDisplay.fill(white)
largeText = pygame.font.Font('freesansbold.ttf',80)
TextSurf, TextRect = text_objects("Catch the Batch", largeText)
TextRect.center = ((display_width/2),(display_height/2))
gameDisplay.blit(TextSurf, TextRect)
button("Play!",350,400,100,50,green,bright_green,game_loop)
button("X",750,0,50,50,red,bright_red,CTBquit)
pygame.display.update()
clock.tick(15)
#ctb stands for 'Catch the Batch' <-- (Title of game)
def CTBquit():
pygame.quit()
quit()
def game_loop():
x = (display_width * 0.45)
y = (display_height * 0.8)
x_change = 0
thing_startx = random.randrange(0, display_width)
thing_starty = -600
thing_speed = 7
thing_width = 100
thing_height = 100
thingCount = 1
dropped = 0
gameExit = False
while not gameExit:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
x_change = -5
elif event.key == pygame.K_RIGHT:
x_change = 5
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
x_change = 0
x += x_change
gameDisplay.fill(white)
# things(thingx, thingy, thingw, thingh, color)
things(thing_startx, thing_starty, thing_width, thing_height, black)
thing_starty += thing_speed
basket(x,y)
things_dropped(dropped)
if x > display_width - basket_width or x < 0:
number_dropped()
if thing_starty > display_height:
thing_starty = 0 - thing_height
thing_startx = random.randrange(0,display_width)
number_dropped += 1
thing_speed += 1
thing_width += (nd * 1.2)
if y < thing_starty+thing_height:
print('y crossover')
if x > thing_startx and x < thing_startx + thing_width or x+basket_width > thing_startx and x + basket_width < thing_startx+thing_width:
print('x crossover')
number_dropped()
pygame.display.update()
clock.tick(60)
game_intro()
game_loop()
pygame.quit()
quit()
我觉得名字 number_dropped 打错了。
if thing_starty > display_height:
thing_starty = 0 - thing_height
thing_startx = random.randrange(0,display_width)
number_dropped += 1 # <- the name number_dropped is conflicted with the function
thing_speed += 1
thing_width += (nd * 1.2)
我想你的意思是：
if thing_starty > display_height:
thing_starty = 0 - thing_height
thing_startx = random.randrange(0,display_width)
dropped += 1 # <----
thing_speed += 1
thing_width += (nd * 1.2)