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alien.py
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alien.py
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import pygame
from pygame.sprite import Sprite
class Alien(Sprite):
def __init__(self, ai):
super().__init__()
self.screen = ai.screen
self.settings = ai.settings
self.image = pygame.image.load("images/alien.bmp")
self.rect = self.image.get_rect()
self.rect.x = self.rect.width
self.rect.y = self.rect.height
self.x = float(self.rect.x)
def update(self):
self.x += self.settings.alien_speed * self.settings.fleet_direction
self.rect.x = self.x
"""
Helper method to determine if alien is at boundary
"""
def boundary(self):
screen_rect = self.screen.get_rect()
if self.rect.right >= screen_rect.right or self.rect.left <= 0:
return True