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'
+# file=open(r"C:\Users\Lenovo\Desktop\新建文件夹\book.txt",'w',encoding='utf-8')
+# file.write('小兰:12本')
+# file.close()
+with open(r"C:\Users\Lenovo\Desktop\新建文件夹\book.txt","r",encoding="utf-8") as file:
+    for i in file:
+        if '小兰:12本' in i:
+            print("数据在文件中")
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