save project

diy.py

-with open(r'C:\Users\Huawei\Desktop\book.txt','a',encoding='utf-8') as file:
-    file.write('小强：12本\n李明：15本\n')
\ No newline at end of file
+with open(r'C:\Users\Huawei\Desktop\book.txt','r',encoding='utf-8') as file:
+    for date in file:
+        if '小强：10本' in date:
+            print('文件中有此数据。')
+        if '小兰：12本' in date:
+            print('文件中有此数据。')
\ No newline at end of file