先说一下turtle,turtle库是python的内部库,全称叫做海龟绘图(Turtle Graphics),是在2.6版本后引入的一个简单绘图工具,使用时直接导入即可。
#!\usr\bin\python
#-*- coding:utf-8 -*-
import turtle
下面直接上代码:
#!\usr\bin\python
#-*- coding:utf-8 -*-
import turtle
def
draw_brach(
brach_length):
if brach_length >
5:
if brach_length <
40:
turtle.color(
'green')
else:
turtle.color(
'red')
#绘制右侧的树枝
turtle.forward(brach_length)
print(
'向前',brach_length)
turtle.right(
25)
print(
'右转20')
draw_brach(brach_length-
15)
#绘制左侧的树枝
turtle.left(
50)
print(
'右转40')
draw_brach(brach_length-
15)
if brach_length<
40:
turtle.color(
'green')
else:
turtle.color(
'red')
#返回之前的树枝上
turtle.right(
25)
print(
'右转20')
turtle.backward(brach_length)
print(
'返回',brach_length)
def
main():
turtle.left(
90)
turtle.penup()
turtle.backward(
150)
turtle.pendown()
turtle.color(
'red')
draw_brach(
100)
turtle.exitonclick()
if
__name__==
'__main__':
main()
运行效果: