save project

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'
 # 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'
+ss=""
 with open(r"C:\Users\86347\Desktop\test.txt","r",encoding="utf-8") as f:
 with open(r"C:\Users\86347\Desktop\test.txt","r",encoding="utf-8") as f:
     for i in f:
     for i in f:
-        for "小兰：12" in f:
-            print("在")
+        if "小兰：12" in i:
+            i=i.replace("小兰：12","小兰：11")
+        ss+=i
+with open(r"C:\Users\86347\Desktop\test.txt","w",encoding="utf-8") as f:
+    f.write(ss)
\ No newline at end of file