auto save

diy.py

-# 写入同学们的捐赠明细：'小兰：12本'、'小丽：11本'、'李文：9本'、'张伟：16本'
+with open(r"c:\Users\admin\Desktop\test.txt","w",encoding="uft-8")as file
+    file.write("小王：12本\n小江：20本\n")
+with open(r"c:\Users\admin\Desktop\test.txt","a",encoding="uft-8")as file
+    file.write("小明：12本\n")
+with open(r"c:\Users\admin\Desktop\test.txt","r",encoding="uft-8")as file
+    a=qwe.read()
+    print(a)
+with open(r"c:\Users\admin\Desktop\test.txt","r",encoding="uft-8")as file
+    for data in file:
+        if"小江,20本"in data:
+            print("找到了")