save project

diy.py

@@ -6,6 +6,7 @@
 #file1.write('张伟：16本\n') 
 #file1.close()
 
-with open(r'C:\Users\HP\Desktop\book.txt','a',encoding='utf-8') as file1:
-    file1.write('小强：12本\n')
-    file1.write('李明：15本\n')  
+with open(r'C:\Users\HP\Desktop\book.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if '小兰：12本' in data:
+            print("数据在文档中")