python樱花树动态源代码

以下是Python樱花树动态源代码：

import turtle
import random

# 设置画布大小
turtle.setup(800, 600)

# 设置画笔速度
turtle.speed(10)

# 设置画笔颜色
turtle.pencolor("white")

# 设置画布背景色
turtle.bgcolor("black")

# 定义花瓣
def petal():
    turtle.fillcolor(random.uniform(0.5, 1), random.uniform(0, 0.5), random.uniform(0.5, 1))
    turtle.begin_fill()
    turtle.circle(10, 90)
    turtle.left(90)
    turtle.circle(10, 90)
    turtle.end_fill()

# 定义花枝
def tree(branch_len):
    if branch_len > 3:
        if branch_len > 10:
            turtle.pensize(branch_len / 10)
        else:
            turtle.pensize(2)
        turtle.forward(branch_len)
        turtle.right(20)
        petal_num = random.randint(3, 5)
        for i in range(petal_num):
            petal()
            turtle.right(360 / petal_num)
        tree(branch_len - random.randint(10, 20))
        turtle.left(40)
        petal_num = random.randint(3, 5)
        for i in range(petal_num):
            petal()
            turtle.right(360 / petal_num)
        tree(branch_len - random.randint(10, 20))
        turtle.right(20)
        turtle.pensize(branch_len / 10)
        turtle.backward(branch_len)

# 定义主函数
def main():
    turtle.left(90)
    turtle.penup()
    turtle.backward(200)
    turtle.pendown()
    tree(100)
    turtle.exitonclick()

# 运行主函数
if __name__ == '__main__':
    main()

运行以上代码，将会在画布上绘制出一棵樱花树，效果如下：