python - Black screen in pygame without any errors? -


so have shmup game i've been working on,but bizarre reason none of objects seem show without errors in python shell! i've searched hours solution no avail. i've gone on of code @ least 20 times. note: before issue there error: valueerror: empty range randrange() (-40,-100, -60), had fixed @ time. code down here:

import pygame,random,os pygame.locals import *  # initialize pygame pygame.init()  # set variables red = (255,0,0) green = (0,255,0) blue = (0,0,255) black = (0,0,0) white = (255,255,255) width = 1280 height = 720  # create window screen =  pygame.display.set_mode((1280,720)) clock = pygame.time.clock()  # sprite groups all_sprites = pygame.sprite.group() enemies = pygame.sprite.group()  # classes class player(pygame.sprite.sprite):     def __init__(self):         self.x, self.y = pygame.mouse.get_pos()         pygame.sprite.sprite.__init__(self)         #self.image = pygame.surface((32,32))++--3         #$self.image.fill((green))         self.image = pygame.image.load("vehicle.png")         self.image.set_colorkey(white)         self.rect = self.image.get_rect()         self.rect.center = (width/2,700)         self.speed = 0      def move(self):         self.keypress = pygame.key.get_pressed()         if self.keypress[pygame.k_a]:             self.speed = 3             self.rect.x -= self.speed         if self.keypress[pygame.k_d]:             self.speed = 3             self.rect.x += self.speed         #self.rect.x += 1         if self.rect.left > width:             self.rect.right = 0         if self.rect.right < 0:             self.rect.left = 1280  class enemy(pygame.sprite.sprite):     def __init__(self):         pygame.sprite.sprite.__init__(self)         self.image = pygame.image.load("missile.png")         self.rect = self.image.get_rect()         self.rect.x = random.randrange(50,1920)         self.rect.y = random.randrange(-40,-100)         self.speedy = random.randrange(1,5)      def enmove(self):         self.rect.y = self.rect.y + self.speedy         if self.rect.top > height:             self.rect.x = random.randrange(30,1920)             self.rect.y = random.randrange(-200,-100)              self.speedy = random.randrange(1,8)     class bullet(pygame.sprite.sprite):     def __init__(self):         pygame.sprite.sprite.__init__(self)         self.image = pygame.surface((32,32))         self.rect = self.image.get_rect()      def bmove(self):         pass   enemy = enemy() enemies.add(enemy) all_sprites.add(enemy) player = player()  while true:     pygame.event.pump()      # main loop     player.move()     enemy.enmove()     all_sprites.add(player)     screen.fill(black)     all_sprites.draw(screen)     enemies.draw(screen)     hits = pygame.sprite.spritecollide(player,enemies,false)     all_sprites.update()     pygame.display.update()


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