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dd.py

+#Authors：xiaobei
 import turtle
-pen=turtle.Pen()
-screen=turtle.Screen()
-size=screen.textinput("输入框","请输入爱心大小")
-screen.bgcolor("light blue")
-pen.penup()
-pen.goto(0,-40)
-pen.write("你好\n欢迎来到玛酷机器人\n准备今天的学习吧",font=("Times",20,"normal"))
-pen1=turtle.Pen()
-pen1.color("red")
-pen1.pensize(5)
-pen1.penup()
-pen1.goto(-30,40)
-pen1.pendown()
-pen1.left(45)
-pen1.forward(int(size)*2)
-pen1.circle(int(size),180)
-pen1.right(90)
-pen1.circle(int(size),180)
-pen1.forward(int(size)*2)
-pen1.hideturtle()
-turtle.done()
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+
+#设置画布，初始化条件
+turtle.setup(700,700)
+turtle.penup()
+turtle.goto(0,-250)
+turtle.pendown()
+turtle.left(90)
+turtle.pensize(2)
+turtle.fd(200)
+
+#加快速度
+turtle.delay(1)
+def DrawTree(length,angle):
+    if length > 5:     #递归结束条件
+    
+        #先画出左树
+        turtle.left(angle)
+        turtle.fd(length)
+        DrawTree(length-15,angle)       #递归调用（假设DrawTree函数可用，调用自身完成左树）
+        turtle.backward(length)         #返回节点处
+        
+        turtle.rt(2*angle)              #调整角度画右树
+        
+        turtle.fd(length)
+        DrawTree(length-15,angle)       #递归调用（假设DrawTree函数可用，调用自身完成右树）
+        turtle.backward(length)         #返回节点处
+        
+        turtle.left(angle)              #调整角度继续画左树
+DrawTree(100,20)
+turtle.mainloop()
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movePos.py

-import turtle 
-#背景颜色
-screen=turtle.Screen()
-screen.bgcolor("light blue")
-#写字
-pen=turtle.Pen()
-pen.penup()
-pen.goto(100,-100)
-pen.write("Hi，诺依~\n用python写电子贺卡真是太有趣啦~\n我也喜欢python~\n——悟空 ",font=("Times",20,"normal"))
-pen.hideturtle()
-#画爱心
-pen1=turtle.Pen()
-pen1.pencolor("red")
-pen1.pensize(5)
-pen1.left(45)
-pen1.forward(100)
-pen1.circle(50,180)
-pen1.right(90)
-pen1.circle(50, 180)
-pen1.forward(100)
-pen1.hideturtle()
-turtle.done()
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tree.py

+from turtle import *
+from random import *
+
+screensize(500,500)
+pensize(3)
+pencolor("red")
+penup()
+goto(0,-250)
+seth(90)
+pendown()
+fd(100)
+delay(2)
+
+def tree(l):
+    if l>0:
+        #画出左树
+        left(30)
+        fd(l)
+        pencolor("brown")
+        tree(l-13)  #递归调用，先画出左子树
+        backward(l) #返回节点
+        #画出右树
+        rt(60)      
+        fd(l)
+        pencolor("blue")
+        tree(l-13)  #递归调用，画右子树的左子树
+        backward(l) #返回节点
+        left(30)    #调整角度，继续画左子树的右子树
+def leaves():
+    pencolor("green")
+    for i in range(50):
+        x=uniform(-250,250)
+        y=uniform(100,280)
+        penup()
+        goto(x,y)
+        pendown()
+        dot(10)
+    pencolor("yellow")
+    for i in range(50):
+        x=uniform(-250,250)
+        y=uniform(-280,-200)
+        penup()
+        goto(x,y)
+        pendown()
+        dot(10)
+tree(100)
+leaves()
+mainloop()
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