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'
+new_data=" "
+with open(r"C:\Users\James\Desktop\book.txt","r",encoding="utf-8")as file:
+    for data in  file:
+        if "小强:10本" in data:
+            data=data.replace("小强:10本","小强:11本")
+                new_data+=date
+with open(r"C:\Users\James\Desktop\book.txt","w",encoding="utf-8")as file:
+    file1.write(new_data)
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