save project

yuiop.py

@@ -5,16 +5,19 @@
 # file1.write('小方：5本')
 # file1.write('小高：20本')
 # file1.close()
+new_data=
 with open(r'C:\users\CM\Desktop\test.txt','r',encoding='utf-8') as file1:
-    for data in file1:
+    for data in file1: 
         if'小兰：12本' in data:
+            data=data.replace('小兰：12本','小兰：14本')
+            new_data+=data
             print('数据在文件中')
 
     file1.write('小兰：12本')
     a=file.read()
     print(a)
-    
-
+with open(r'C:\users\CM\Desktop\test.txt','r',encoding='utf-8') as file1:    
+    file1.write(new_data)