Python的turtle模块肯定很棒吧！这次，我们要利用turtle来完成一个樱花树的绘制。我们要用def和for语句循环。
难度等级：
Python资源共享群：626017123
工具：turtle、random
我用的是Python 3.8.0b3 Shell，开始写代码吧！
# 樱花树
import randomimport turtle
Jess = turtle.Turtle()Jess.hideturtle()Jess.left(90)Jess.penup()Jess.goto(0, -100)Jess.pendown()
# “画树”函数# 参数分别是树枝长度、画笔def tree(branchLen, t): if (branchLen > 3): if (8 <= branchLen and branchLen <= 12) : if (random.randint(0, 2) == 0) : Jess.pencolor('snow') else : Jess.pencolor('lightcoral') Jess.pensize((branchLen / 3)) elif (branchLen < 8) : if (random.randint(0, 1) == 0) : Jess.pencolor('snow') else : Jess.pencolor('lightcoral') Jess.pensize((branchLen / 2)) else : Jess.pencolor('sienna') Jess.pensize((branchLen / 10)) Jess.forward(branchLen) a = (1.5 * (random.random())) Jess.right((20 * a)) b = (1.5 * (random.random())) # 在tree函数内部调自己，这种方式叫递归调用 # 递归可以大幅提升编程效率 tree(branchLen - 10 * b, t) Jess.left((40 * a)) tree(branchLen - 10 * b, t) Jess.right((20 * a)) Jess.penup() Jess.backward(branchLen) Jess.pendown()
# 绘制树下花瓣，参数分别是画板数、画笔
def petal(m, t): for i in range(m): a = (200 - 400 * (random.random())) b = (10 - 20 * (random.random())) Jess.penup() Jess.forward(b) Jess.left(90) Jess.forward(a) Jess.pendown() Jess.pencolor('lightcoral') Jess.circle(1) Jess.penup() Jess.backward(a) Jess.right(90) Jess.backward(b)
def main(): Jess = turtle.Turtle() Jess.hideturtle() Jess.speed(0) Jess.goto(0, 0) Jess.penup() Jess.backward(150) Jess.pendown() Jess.pencolor('sienna') tree(60, Jess) petal(100, Jess) turtle.done()
main()
来预览一下效果吧：（因为时间关系，这次不展示视屏，只展示图片，画的时间要4~6分钟，建议不要看全程！）
你有没有发现，它每次画的都不一样吗？是因为我们用了random，让它随机画。
来源：CSDN
作者：pythoncxy
链接：https://blog.csdn.net/Pythoncxy/article/details/100039065