auto save

my.py

+from tkinter import filedialog, Tk
+from

my_search.py

-import random
-
-alist = []
-for i in range(1, 101):
-    alist.append(i)
-num = random.choice(alist)
-# 请完善二分查找函数binary_search(),查找出num在列表alist里面的索引位置
-
-def binary_search(alist,num):
-    low=0
-    high=len(alist)-1
-    while low<=high:
-        mid=(low+high)//2
-        guess=alist[mid]
-        if guess==num:
-            return mid
-        elif guess<num:
-            low=mid+1
-        elif guess>num:
-            high=mid-1
-    return None
-a=binary_search(alist,num)
-print("随机数是",num)
-print("它的索引位置是",a)
\ No newline at end of file
+import turtle
+def tree(le):
+    if le>0:
+        t.forward(le)
+        t.right(30)
+        tree(le-10)
+        t.left(60)
+        tree(le-10)
+        t.right(30)
+        t.up()
+        t.backward(le)
+        t.down()
+t=turtle.Turtle()
+t.left(90)
+tree(50)
+t.hideturtle()
+t.done()
\ No newline at end of file