save project

diy4.py

@@ -3,8 +3,15 @@ file1.write('小兰:12本\n')
 file1.write('小强:10本\n')
 file1.write('李明:15本\n')
 file1.close()
+
+
+
+new_data=''
 with open('C:\\Users\\huawei\\Desktop\\test.txt','r',encoding='utf-8') as file1:
     for data in file1:
-        if '小强:10本' in data:
-            print('在')
+        if '小强:10本' in file1:
+            data=data.replace('小强:10本','小强:11本')
+            new_data+=data
+        file1.write(new_data)
+        print(new_data)
             
\ No newline at end of file