飞机大战，补给模块，图片显示报错？？？
错误提示：
File "C:/Users/Administrator/Desktop/python/3.飞机大战素材 代码--小甲鱼/supply.py", line 10, in Bullet_Supply
self.image = pygame.image.load("image/bullet_supply.png").convert_alpha()
pygame.error: No video mode has been set
我懵了，哪来的video
import pygame
from random import *
pygame.init()
pygame.mixer.init()
class Bullet_Supply(pygame.sprite.Sprite):
def __init__(self,bg_size):
pygame.sprite.Sprite.__init__(self)#继承类
self.image = pygame.image.load("image/bullet_supply.png").convert_alpha()
self.rect = self.image.get_rect()
self.width,self.height =bg_size, bg_size
self.rect.left,self.rect.bottom = \
randint(0,self.width-self.rect.width),-100
self.speed = 5
self.active = False #为true的时候，移动，这里的active是指是否下发补给，若为False,补给不存在
self.mask = pygame.mask.from_surface(self.image)
def move(self):
if self.rect.top < self.height:
self.rect.top += self.speed
else:
self.active = False
def reset(self):
self.active = True
self.rect.left,self.rect.top = \
randint(0,self.width-self.rect.width),-100
class Bomb_Supply(pygame.sprite.Sprite):
def __init__(self,bg_size):
pygame.sprite.Sprite.__init__(self)#继承类
self.image = pygame.image.load("image/bullet_supply.png").convert()
self.rect = self.image.get_rect()
self.width,self.height =bg_size, bg_size
self.rect.left,self.rect.bottom = \
randint(0,self.width-self.rect.width),-100
self.speed = 5
self.active = False #为true的时候，移动
self.mask = pygame.mask.from_surface(self.image)
def move(self):
if self.rect.top < self.height:
self.rect.top += self.speed
else:
self.active = False
def reset(self):
self.active = True
self.rect.left,self.rect.top = \
randint(0,self.width-self.rect.width),-100
11-19，37-45行缩进错误，导致语句被直接运行，直接运行会报错，需要从在主程序里定义里屏幕后调用才不会出错。
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