auto save

diy.py

 # 写入同学们的捐赠明细
 with open(r"C:\Users\Administrator\Desktop\xjb.txt","r",encoding='utf-8') as xjb:
     for i in xjb:
-        if "张伟：16本" in i:
-            print('数据在文件中')
\ No newline at end of file
+        if "小强：10本" in i:
+            xjb=xjb.replace("小强：10本","小强：11本")
+        if "小兰：12本" in i:
+            xjb=xjb replace("小兰：12本","小兰：14本")
+                
\ No newline at end of file