实现代码

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')# 画樱花的躯干Tree(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()