save project

diy.py

@@ -8,3 +8,22 @@ file1.close()
 with open(r'C:\Users\CM\Desktop\book.txt','w',encoding='utf-8') as file:
     file.write('小强：10本\n')
     file.write('李明：15本\n')
+with open(r'C:\Users\CM\Desktop\book.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if '小强：10本' in date:
+            print('小强在文件中')
+        if '小兰：12本' in date:    
+            print('小兰在文件中')
+
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