[英]'Button' object has no attribute 'prep_msg'
通過python速成課程,由於某種原因,我無法弄清楚我在第一個項目的這一部分,Alien入侵時做錯了什么。 它說Button對象沒有屬性'prep_msg'。 任何幫助,將不勝感激!
附件是追溯和模塊:
pygame 1.9.4
Hello from the pygame community. https://www.pygame.org/contribute.html
Traceback (most recent call last):
File "alien_invasion.py", line 63, in <module>
run_game()
File "alien_invasion.py", line 25, in run_game
play_button = Button(ai_settings, screen, "Play")
File "C:\Users\eslog\OneDrive\Desktop\alien_invasion\button.py", line 21, in __init__
self.prep_msg(msg)
AttributeError: 'Button' object has no attribute 'prep_msg'
和按鈕mod
import pygame.font
class Button():
def __init__(self, ai_settings, screen, msg):
"""initialize button attrributes"""
self.screen = screen
self.screen_rect = screen.get_rect()
#set the dimesions and properties of the button
self.width, self.height = 200, 50
self.button_color = (0, 255, 0)
self.text_color = (255, 255, 255)
self.font = pygame.font.SysFont(None, 48)
#build the button's rect object and center it
self.rect = pygame.Rect(0, 0, self.width, self.height)
self.rect.center = self.screen_rect.center
#the button message needs to be prepped only once
self.prep_msg(msg)
def prep_msg(self, msg):
"""turn msg into a rendered image and center text on the button"""
self.msg_image = self.font.render(msg, True, self.text_color,
self.button_color)
self.msg_image_rect = self.msg_image.get_rect()
self.msg_image.center = self.rect.center
def draw_button(self):
#draw blank button and then draw message
self.screen.fill(self.button_color, self.rect)
self.screen.blit(self.msg_image, self.msg_image_rect)
看起來你的意思是prep_msg()是Button類的一個方法。 問題是你的縮進。 prep_msg()和draw_button()方法都在 init()方法中縮進,使它們基本上是嵌套函數。
這應該可以解決問題:
import pygame.font
class Button():
def __init__(self, ai_settings, screen, msg):
"""initialize button attrributes"""
self.screen = screen
self.screen_rect = screen.get_rect()
#set the dimesions and properties of the button
self.width, self.height = 200, 50
self.button_color = (0, 255, 0)
self.text_color = (255, 255, 255)
self.font = pygame.font.SysFont(None, 48)
#build the button's rect object and center it
self.rect = pygame.Rect(0, 0, self.width, self.height)
self.rect.center = self.screen_rect.center
#the button message needs to be prepped only once
self.prep_msg(msg)
def prep_msg(self, msg):
"""turn msg into a rendered image and center text on the button"""
self.msg_image = self.font.render(msg, True, self.text_color,
self.button_color)
self.msg_image_rect = self.msg_image.get_rect()
self.msg_image.center = self.rect.center
def draw_button(self):
#draw blank button and then draw message
self.screen.fill(self.button_color, self.rect)
self.screen.blit(self.msg_image, self.msg_image_rect)
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