myplane.py

import pygame 
class MyPlane(pygame.sprite.Sprite):
    def __init__(self,bg_size):
        pygame.sprite.Sprite.__init__(self)
        self.image1=pygame.image.load('images/me1.png').convert_alpha()
        self.image2=pygame.image.load('images/me2.png').convert_alpha()
        self.destroy_images=[]
        self.destroy_images.extend([\
            pygame.image.load('images/me_destroy_1.png').convert_alpha(),\
            pygame.image.load('images/me_destroy_2.png').convert_alpha(),\
            pygame.image.load('images/me_destroy_3.png').convert_alpha(),\
            pygame.image.load('images/me_destroy_4.png').convert_alpha()\
            ])
        self.rect=self.image1.get_rect()
        self.width,self.height=bg_size[0],bg_size[1]
        self.rect.left, self.rect.top = \
            (self.width - self.rect.width) // 2, \
            self.height - self.rect.height - 60
        self.speed=12
        self.invincible=False
        self.active=True
        self.mask=pygame.mask.from_surface(self.image1)
    def moveUp(self):
        if self.rect.top>0:
            self.rect.top-=self.speed
        else:
            self.rect.top=0
    def moveDown(self):
        if self.rect.bottom<self.height-60:
            self.rect.top+=self.speed
        else:
            self.rect.bottom=self.height-60
    def moveLeft(self):
        if self.rect.left>0:
            self.rect.left-=self.speed
        else:
            self.rect.left=0
    def moveRight(self):
        if self.rect.right<self.width:
            self.rect.left+=self.speed
        else:
            self.rect.right=self.width
    def reset(self):
        self.rect.left, self.rect.top = \
            (self.width - self.rect.width) // 2, \
            self.height - self.rect.height - 60
        self.active=True
        self.invincible=True