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1/1.py

+import turtle
+import random  # 导入random模块
+
+pen = turtle.Turtle()
+pen.color('sienna')
+pen.speed(0)  # 用pen.speed()方法参数设为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)
+pen.down()
+
+# 树枝
+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')  # 赭(zhě)色
+            pen.pensize(n / 10)  
+        pen.forward(n)
+        angle = random.random()
+        pen.right(30*angle)
+        length = 1.5*random.random()
+        tree(n-10*length)
+        pen.left(60*angle)
+        tree(n-10*length)
+        pen.right(30*angle)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+
+tree(60)
+turtle.done()

my_tree.py

-import turtle        # 导入turtle模块
-import random        # 导入random模块
+import turtle  # 导入turtle模块
 
 
-# 分形树
-def tree(n):
-    if
-
-pen = turtle.Turtle()   # 创建画笔
-pen.color('sienna')     # 画笔颜色
-pen.speed(0)
+pen = turtle.Turtle()  # 创建画笔用turtle.Turtle()方法并赋值给变量pen
+pen.color('sienna')  # 设置画笔颜色用pen.color()方法参数为sienna
 # 画布大小
 # 画布大小
 w = turtle.Screen()
 w = turtle.Screen()
-w.bgcolor('wheat')      # 设置画布颜色'wheat小麦'
-
+w.bgcolor('wheat')   # 设置画布颜色wheat小麦
 # 移动到起点
 # 移动到起点
-pen.left(90)            # 画笔角度左转90度
-pen.up()                # 朝向正上方
-pen.backward(150)       # 后退150
-pen.down()              # 朝向正下方
+pen.left(90)  # 左转90
+pen.up()      # 抬笔
+pen.backward(150)  # 后退150
+pen.down()    # 落笔
 
 
-tree(60)                # 设置树枝长度60
+# 分形树
+def tree(n):  # def定义tree()函数参数为n
+    if n >= 50:  # if判断变量n>=50
+        pen.forward(n)  # 前进变量n
+        pen.right(30)   # 右转30
+        tree(n-10)      # 函数tree()的值改为n-10增加递归层数
+        pen.left(60)    # 左转60
+        tree(n-10)      # 函数tree()的值改为n-10增加递归层数
+        pen.right(30)   # 右转30
+        pen.up()        # 抬笔
+        pen.backward(n) # 后退变量n
+        pen.down()      # 落笔
 
 
-turtle.done()
+tree(100)  # tree()方法参数为100
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+turtle.done()  # turtle.done()方法
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