Python+Turtle动态绘制一棵树实例分享-创新互联

本文实例主要是对turtle的使用，实现Python+turtle动态绘制一棵树的实例，具体代码：

公司主营业务：成都网站建设、成都网站设计、移动网站开发等业务。帮助企业客户真正实现互联网宣传，提高企业的竞争能力。创新互联是一支青春激扬、勤奋敬业、活力青春激扬、勤奋敬业、活力澎湃、和谐高效的团队。公司秉承以“开放、自由、严谨、自律”为核心的企业文化，感谢他们对我们的高要求，感谢他们从不同领域给我们带来的挑战，让我们激情的团队有机会用头脑与智慧不断的给客户带来惊喜。创新互联推出大姚免费做网站回馈大家。

# drawtree.py
 
from turtle import Turtle, mainloop
 
def tree(plist, l, a, f):
  """ plist is list of pens
  l is length of branch
  a is half of the angle between 2 branches
  f is factor by which branch is shortened
  from level to level."""
  if l > 5: #
    lst = []
    for p in plist:
      p.forward(l)#沿着当前的方向画画Move the turtle forward by the specified distance, in the direction the turtle is headed.
      q = p.clone()#Create and return a clone of the turtle with same position, heading and turtle properties.
      p.left(a) #Turn turtle left by angle units
      q.right(a)# turn turtle right by angle units, nits are by default degrees, but can be set via the degrees() and radians() functions.
      lst.append(p)#将元素增加到列表的最后
      lst.append(q)
    tree(lst, l*f, a, f)
  
      
 
def main():
  p = Turtle()
  p.color("green")
  p.pensize(5)
  #p.setundobuffer(None)
  p.hideturtle() #Make the turtle invisible. It's a good idea to do this while you're in the middle of doing some complex drawing,
  #because hiding the turtle speeds up the drawing observably.
  #p.speed(10)
  # p.getscreen().tracer(1,0)#Return the TurtleScreen object the turtle is drawing on.
  p.speed(10)
  #TurtleScreen methods can then be called for that object.
  p.left(90)# Turn turtle left by angle units. direction 调整画笔
 
  p.penup() #Pull the pen up – no drawing when moving.
  p.goto(0,-200)#Move turtle to an absolute position. If the pen is down, draw line. Do not change the turtle's orientation.
  p.pendown()# Pull the pen down – drawing when moving. 这三条语句是一个组合相当于先把笔收起来再移动到指定位置，再把笔放下开始画
  #否则turtle一移动就会自动的把线画出来
 
  #t = tree([p], 200, 65, 0.6375)
  t = tree([p], 200, 65, 0.6375)
   
main()

另外有需要云服务器可以了解下创新互联scvps.cn，海内外云服务器15元起步，三天无理由+7*72小时售后在线，公司持有idc许可证，提供“云服务器、裸金属服务器、高防服务器、香港服务器、美国服务器、虚拟主机、免备案服务器”等云主机租用服务以及企业上云的综合解决方案，具有“安全稳定、简单易用、服务可用性高、性价比高”等特点与优势，专为企业上云打造定制，能够满足用户丰富、多元化的应用场景需求。

网站栏目：Python+Turtle动态绘制一棵树实例分享-创新互联
网站链接：http://cdxtjz.cn/article/diehdj.html