save project

diy.py

@@ -8,3 +8,97 @@ file1.close()
 with open(r'C:\Users\user\Desktop\book.txt','a',encoding='utf-8')as file:
 with open(r'C:\Users\user\Desktop\book.txt','a',encoding='utf-8')as file:
     file.write('小强:10本\n')
     file.write('小强:10本\n')
     file.write('李文:15本\n')
     file.write('李文:15本\n')
+   
+with open(r'C:\Users\user\Desktop\book.txt','r',encoding='utf-8')as file:
+    for data in file1:
+        if'小强:10本'in data:
+            print('小强数据在文件中')
+        if'小兰:12本'in data:
+            print('小兰数据在文件中')
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