save project

diy.py

@@ -17,3 +17,9 @@ with open(r'C:\Users\Administrator\Desktop\book.txt','a',encoding='utf-8') as fi
     file.write('小强:10本\n')
     file.write('李明:15本\n')
 
+with open(r'C:\Users\Administrator\Desktop\book.txt','a',encoding='utf-8') as file1；
+    for data in file1:
+        if '小强:10本\n' in data；
+            print('小强的数据在文件中')
+        if '小兰:12本\n' in data；
+            print('小兰的数据在文件中')
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