python粒子动态圣诞树代码

以下是一个使用turtle库绘制动态圣诞树的Python代码：

import turtle
import random

def tree(d, s):
    if d <= 0:
        return
    turtle.forward(s)
    tree(d - 1, s * .8)
    turtle.right(120)
    tree(d - 3, s * .5)
    turtle.right(120)
    tree(d - 3, s * .5)
    turtle.right(120)
    turtle.backward(s)

def draw_tree():
    turtle.speed(0)
    turtle.up()
    turtle.goto(0, -200)
    turtle.down()
    turtle.color('green')
    turtle.begin_fill()
    tree(7, 100)
    turtle.end_fill()

def draw_leaves():
    turtle.up()
    for _ in range(200):
        a = 200 - 400 * random.random()
        b = 10 - 20 * random.random()
        turtle.forward(b)
        turtle.left(90)
        turtle.forward(a)
        turtle.down()
        if random.randint(0, 1) == 0:
            turtle.color('tomato')
        else:
            turtle.color('wheat')
        turtle.circle(2)
        turtle.up()
        turtle.backward(a)
        turtle.right(90)
        turtle.backward(b)

def draw_christmas():
    turtle.bgcolor('black')
    draw_tree()
    draw_leaves()
    turtle.hideturtle()
    turtle.done()

draw_christmas()