可爱的金币天使源代码

一个接金币小游戏，下面是部分代码预览：

"""
   可爱的金币天使.py
   天下掉来下很多金币,通过按上下左右方向箭头去按住它们。   
"""
from random import randint
from turtle import Turtle,Screen

class Coin(Turtle):
    """定义Coin类，继承自Turtle类"""
    def __init__(self,angel,image):

        """初始化函数，
        参数：
        angel：引用的另一个对象
        image：造型
        """
        Turtle.__init__(self,shape = image,visible= False)
        self.angel = angel
        self.color("white")
        self.penup()        
        self.xspeed = 0
        self.yspeed = randint(-5,-1)
        self.w = self.screen.window_width()   # 屏幕宽度
        self.h = self.screen.window_height()  # 屏幕高度  
       
    def goto_top(self):
        """到上面随机一个位置"""
        self.hideturtle()
        
    def move(self):
        """不断地移动对象"""
        x = self.xcor()
        y = self.ycor()
        self.setx(x + self.xspeed)           # x坐标增加
        self.sety(y + self.yspeed)           # y坐标增加

    def collide(self):
        """碰到angel的检测，以距离进行判断"""

if __name__ == "__main__":
    
    coin = "coin.gif"
    girl = "character.gif"
    
    screen = Screen()
    screen.bgcolor("black")
    screen.delay(0)
    screen.title("可爱的金币天使 www.lixingqiu.com")
    screen.addshape(coin)
    screen.addshape(girl)
    
    angel = Turtle(shape = girl)
    angel.penup()
    angel.counter = 0
    angel.sety(-240)
    screen.onkeypress(lambda:angel.setx(angel.xcor() - 10),"Left")
    screen.onkeypress(lambda:angel.setx(angel.xcor() + 10),"Right")
    screen.onkeypress(lambda:angel.sety(angel.ycor() - 10),"Down")
    screen.onkeypress(lambda:angel.sety(angel.ycor() + 10),"Up")
    
    [Coin(angel,coin) for i in range(10)]
    
    screen.listen()
    
    screen.mainloop()

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