Python编程教程中关于樱花树部分的代码如下：

import turtle as tu

import random as ra

def flower():

tu.hideturtle()

tu.pensize(2)

tu.pencolor("pink")

flowersize = ra.randint(1,5)

for j in range(5):

tu.forward(int(flowersize))

tu.backward(int(flowersize))

tu.right(72)

def tree(n,k):

tu.pendown()

tu.pencolor("black")

tu.pensize(n/4)

tu.forward(k)

if n>0:

r=ra.random()10+10

l=ra.random()10+10

x=k(ra.random()0.25+0.7)

tu.right(r)