save project

diy.py

@@ -9,10 +9,15 @@ file.close()
 with open(r'C:\Users\Administrator\Desktop\w.txt','a',encoding='utf-8') as file:
     file.write('小强：10本\n')
     file.write('李明：15本\n')
-
+new_data=''
 with open(r'C:\Users\Administrator\Desktop\w.txt','r',encoding='utf-8') as file:
     for data in file:
         if '小强：10本' in data: 
-            print('小强数据文件中')
+            data=data.replace('小强：10本','小强：11本')
         if '小兰：12本' in data:  
-            print('小兰数据文件中')
\ No newline at end of file
+            data=data.replace('小兰：12本','小兰：14本')
+with open(r'C:\Users\Administrator\Desktop\w.txt','w',encoding='utf-8') as file:
+    file.write(new_data)
+with open(r'C:\Users\Administrator\Desktop\w.txt','r',encoding='utf-8') as file:
+    a=file.read()
+    print(a)
\ No newline at end of file