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'
+new_date = ""
 with open(r"C:\Users\Windows 10\Desktop\book.txt","r",encoding="utf-8") as file:
-    a = file.read() 
-    for date in a:
-        if "小强：10本" in date:
-            print("yes1")
+    for date in file:
+        if "小强：12本" in date:
+            date.replace("小强：12本","小强：11本")
         if "小兰：12本" in date:
-            print("yes2")‘
\ No newline at end of file
+            date.replace("小兰：12本","小兰：14本")
+        new_date += date
+with open(r"C:\Users\Windows 10\Desktop\book.txt","w",encoding="utf-8") as file:
+     file.write(new_date)
\ No newline at end of file