save project

diy.py

@@ -143,10 +143,16 @@ with open(r"C:\Uses\CM\Desktop\book.txt","w",encoding="utf-8") as file:
 
 
 
-
+new_data=''
     with open(r"C:\Uses\CM\Desktop\book.txt","w",encoding="utf-8") as file:
         for data in file1:
             if'小兰:12本' in data:
-                print('小兰在')
+                data=data replace('小兰:12本','小兰:10本')
             if'李文:9本' in data:
-                print('李文在'')
\ No newline at end of file
+                data=data replace('李文:9本','李文:10本')
+            new_data+=data
+with open(r"C:\Uses\CM\Desktop\book.txt","w",encoding="utf-8") as file:
+    file1.write(new_data)
+with open(r"C:\Uses\CM\Desktop\book.txt","w",encoding="utf-8") as file:
+    a=file1.read()
+    print(a)
\ No newline at end of file