import turtle as Timport randomimport time# 画樱花的躯干(60,t)def Tree(branch, t): time.sleep(0.0005) if branch > 3: if 8 <= branch <= 12: if random.randint(0, 2) == 0: t.color(snow) # 白 else: t.color(lightcoral) # 淡珊瑚色 t.pensize(branch / 3) elif branch < 8: if random.randint(0, 1) == 0: t.color(snow) else: t.color(lightcoral) # 淡珊瑚色 t.pensize(branch / 2) else: t.color(sienna) # 赭(zhě)色 t.pensize(branch / 10) # 6 t.forward(branch) a = 1.5 * random.random() t.right(20 * a) b = 1.5 * random.random() Tree(branch - 10 * b, t) t.left(40 * a) Tree(branch - 10 * b, t) t.right(20 * a) t.up() t.backward(branch) t.down()# 掉落的花瓣def Petal(m, t): for i in range(m): a = 200 - 400 * random.random() b = 10 - 20 * random.random() t.up() t.forward(b) t.left(90) t.forward(a) t.down() t.color(lightcoral) # 淡珊瑚色 t.circle(1) t.up() t.backward(a) t.right(90) t.backward(b)# 绘图区域t = T.Turtle()# 画布大小w = T.Screen()t.hideturtle() # 隐藏画笔t.getscreen().tracer(5, 0)w.screensize(bg=wheat) # wheat小麦t.left(90)t.up()t.backward(150)t.down()t.color(sienna)# 画?；ǖ那蒚ree(60, t)# 掉落的花瓣Petal(200, t)w.exitonclick()

代码：

from turtle import *from random import *from math import *def tree(n,l): pd()#下笔 #阴影效果 t = cos(radians(heading() 45))/8 0.25 pencolor(t,t,t) pensize(n/3) forward(l)#画树枝 if n>0: b = random()*15 10 #右分支偏转角度 c = random()*15 10 #左分支偏转角度 d = l*(random()*0.25 0.7) #下一个分支的长度 #右转一定角度,画右分支 right(b) tree(n-1,d) #左转一定角度，画左分支 left(b c) tree(n-1,d) #转回来 right(c) else: #画叶子 right(90) n=cos(radians(heading()-45))/4 0.5 pencolor(n,n*0.8,n*0.8) circle(3) left(90) #添加0.3倍的飘落叶子 if(random()>0.7): pu() #飘落 t = heading() an = -40 random()*40 setheading(an) dis = int(800*random()*0.5 400*random()*0.3 200*random()*0.2) forward(dis) setheading(t) #画叶子 pd() right(90) n = cos(radians(heading()-45))/4 0.5 pencolor(n*0.5 0.5,0.4 n*0.4,0.4 n*0.4) circle(2) left(90) pu() #返回 t=heading() setheading(an) backward(dis) setheading(t) pu() backward(l)#退回bgcolor(0.5,0.5,0.5)#背景色ht()#隐藏turtlespeed(0)#速度 1-10渐进，0 最快tracer(0,0)pu()#抬笔backward(100)left(90)#左转90度pu()#抬笔backward(300)#后退300tree(12,100)#递归7层done()

代码

from turtle import *from random import *from math import *def tree(n, l): pd() t = cos(radians(heading() 45)) / 8 0.25 pencolor(t, t, t) pensize(n / 4) forward(l) if n > 0: b = random() * 15 10 c = random() * 15 10 d = l * (random() * 0.35 0.6) right(b) tree(n - 1, d) left(b c) tree(n - 1, d) right(c) else: right(90) n = cos(radians(heading() - 45)) / 4 0.5 pencolor(n, n, n) circle(2) left(90) pu() backward(l)bgcolor(0.5, 0.5, 0.5)ht()speed(0)tracer(0, 0)left(90)pu()backward(300)tree(13, 100)done()