auto save

demo.py

+import random
+
+a = random.random()
+print(a*15)
\ No newline at end of file

demo1.py

+import turtle
+import random
+
+def tree(n):
+    if n >= 0:
+        if n <= 12:
+            color_list = ['snow','lightcoral']
+            color = random.choice(color_list)
+            pen.color(color)
+            pen.pensize(n/3)
+        else:
+            pen.color('sienna')
+            pen.pensize(n/10)
+        angle = random.random()
+        lenght = 1.5*random.random()
+        pen.forward(n)
+        pen.right(30*angle)
+        tree(n-10*lenght)
+        pen.left(2*30*angle)
+        tree(n-10*lenght)
+        pen.right(30*angle)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+
+pen = turtle.Turtle()
+pen.color('sienna')
+pen.speed(0)
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+
+# 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+
+
+tree(60)      
+
+turtle.done() 

my_tree.py

 import turtle
+import random
 
 pen = turtle.Turtle()
 pen.color('sienna')
@@ -12,4 +13,28 @@ pen.up()
 pen.backward(150)    # 后退
 pen.down()
 
+#分形树
+def tree(n):
+    if n >= 0:
+        if n <= 12:
+            color_list = ['snow', 'lightcoral']
+            color = random.choice(color_list)
+            pen.color(color)
+            pen.pensize(n/3)
+        else:
+            pen.color('sienna')
+            pen.pensize(n/10)
+        angle = random.random()
+        length = 1.5*random.random()
+        pen.forward(n)
+        pen.right(30*angle)
+        tree(n-10*length)
+        pen.left(2*30*angle)
+        tree(n-10*length)
+        pen.right(30*angle)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+tree(60)
+
 turtle.done()