我收到此错误 AttributeError: 'function' object has no attribute 'hlauncher' while试图从另一个文件中获取属性

Question

So I have the error:

launchercheck = game.update.hlauncher()
AttributeError: 'function' object has no attribute 'hlauncher'

When I want to press spacebar to shoot my weapon, it worked before I added this in the code:

launchercheck = game.update.hlauncher()
if launchercheck is True:
    self.kill()

The self.kill() is just there to test if my If function works.

game.update.hlauncher() refers to my main.py file there it should look in the class 'game' for 'update' and within 'update' it should grab hlauncher hlauncher should change from False to True upon the player picking up the homing launcher. Here's update within game:

def update(self):
    # update portion of the game loop
    self.all_sprites.update()
    self.camera.update(self.player)
    # game over
    if len(self.mobs) == 0:
        self.playing = False
    # player hits items
    hlauncher = False
    hits = pg.sprite.spritecollide(self.player, self.items, False)
    for hit in hits:
        if hit.type == 'health' and self.player.health < PLAYER_HEALTH:
            hit.kill()
            self.effects_sounds['health_up'].play()
            self.player.add_health(HEALTH_PACK_AMOUNT)
        if hit.type == 'pistol':
            hit.kill()
            self.effects_sounds['gun_pickup'].play()
            self.player.weapon = 'pistol'
            game_folder = path.dirname(__file__)
            img_folder = path.join(game_folder, 'img')
        if hit.type == 'shotgun':
            hit.kill()
            self.effects_sounds['gun_pickup'].play()
            self.player.weapon = 'shotgun'
            game_folder = path.dirname(__file__)
            img_folder = path.join(game_folder, 'img')
        if hit.type == 'rifle':
            hit.kill()
            self.effects_sounds['gun_pickup'].play()
            self.player.weapon = 'rifle'
            game_folder = path.dirname(__file__)
            img_folder = path.join(game_folder, 'img')
        if hit.type == 'sniperrifle':
            hit.kill()
            self.effects_sounds['gun_pickup'].play()
            self.player.weapon = 'sniperrifle'
            game_folder = path.dirname(__file__)
            img_folder = path.join(game_folder, 'img')
        if hit.type == 'launcher':
            hit.kill()
            self.effects_sounds['gun_pickup'].play()
            self.player.weapon = 'launcher'
            game_folder = path.dirname(__file__)
            img_folder = path.join(game_folder, 'img')
        if hit.type == 'hominglauncher':
            hit.kill()
            self.effects_sounds['gun_pickup'].play()
            self.player.weapon = 'hominglauncher'
            game_folder = path.dirname(__file__)
            img_folder = path.join(game_folder, 'img')
            hlauncher = True
    # mobs hit player
    hits = pg.sprite.spritecollide(self.player, self.mobs, False, collide_hit_rect)
    for hit in hits:
        if random() < 0.7:
            choice(self.player_hit_sounds).play()
        self.player.health -= MOB_DAMAGE
        hit.vel = vec(0, 0)
        if self.player.health <= 0:
            self.playing = False
    if hits:
        self.player.hit()
        self.player.pos += vec(MOB_KNOCKBACK, 0).rotate(-hits[0].rot)
    # bullets hit mobs
    hits = pg.sprite.groupcollide(self.mobs, self.bullets, False, True)
    for mob in hits:
        for bullet in hits[mob]:
            mob.health -= bullet.damage
        mob.vel = vec(0, 0)

I already tried putting () behind True and False in the main file which gave the same error and I already fiddled around with game.update.hlauncher() which should look at hlauncher each time I try to shoot to confirm that I'm holding a hominglauncher and vice versa.

Thanks for your help!

Answer 1

If update was an instance of a class, and hlauncher was a member-function of that class, then your syntax would be correct.

But hlauncher is a local(?) variable in the function update() . It could also be a global variable, but it's not possible to know from the code. Assuming it's local, there is no way to access it from outside the update function, because it only exists while this function is executing - that's what it means to be locally-defined. If hlauncher is globally defined, at any time it can be set: hlauncher = True .

But it would probably be best to add this functionality to the player class:

class Player:
    def __init__( self ):
        pygame.sprite.Sprite.__init__(self)
        ... # other stuff
        self.has_hlauncher  = False
        self.hlauncher_ammo = 0

    def addHLauncher( self ):
        self.has_hlauncher = True
        self.hlauncher_ammo += 10

Then the code could call:

self.player.addHLauncher()

If you're having difficulty with all this, perhaps have a quick read of how variable scope works in Python.