save project

diy.py

@@ -8,9 +8,9 @@ new_file=''
 with open(r'C:\Users\Makcoo-Bellcode\Desktop\book.txt','r',encoding='utf-8')as file: 
 with open(r'C:\Users\Makcoo-Bellcode\Desktop\book.txt','r',encoding='utf-8')as file: 
     for data in file:
     for data in file:
         if '小强：10本' in data:
         if '小强：10本' in data:
-            data.replace('小强：10本','小强：11本')
+            data=data.replace('小强：10本','小强：11本')
         if '小兰：12本' in data:
         if '小兰：12本' in data:
-            data.replace('小兰：12本','小兰：14本')
+            data=data.replace('小兰：12本','小兰：14本')
         new_file+=data
         new_file+=data
 with open(r'C:\Users\Makcoo-Bellcode\Desktop\book.txt','w',encoding='utf-8')as file: 
 with open(r'C:\Users\Makcoo-Bellcode\Desktop\book.txt','w',encoding='utf-8')as file: 
     file.write(new_file)
     file.write(new_file)
\ No newline at end of file