python纯画笔大雪纷飞景像模拟

python turtle snow fall simulation大雪纷飞模拟景象

"""
   python大雪纷飞景像模拟2.py
   本程序中只有一个海龟对象,但却有330个雪花,
   这是如何实现的呢?
"""

import time
from turtle import *
from random import randint

class Snow:
    """雪花类"""
    def __init__(self,rect):
        """
           rect:所在的矩形区域大小,值为(width,height)
        """

rect = width,height = 640,480
screen = Screen()
screen.tracer(0,0)
screen.bgcolor('black')
screen.setup(width,height)
screen.title("python大雪纷飞景像模拟2")

t = Turtle(visible=False)          # 新建海龟对象
t.penup()

snows = [Snow(rect) for i in range(330)]

 
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