save project

diy.py

 # 写入同学们的捐赠明细：'小兰：12本'、'小丽：11本'、'李文：9本'、'张伟：16本'
-new_f=''
+new_i=''
 with open("C:\\Users\\hp\\Desktop\\test.txt","r",encoding='utf-8') as f:
     for i in f:
         if '张伟：16本' in i:
             i=i.replace('张伟：16本','张伟：11本')
-            new_f+=i
+        new_i+=i
+
 with open("C:\\Users\\hp\\Desktop\\test.txt","w",encoding='utf-8') as f:
-    f.write(new_f)
\ No newline at end of file
+    i.write(new_i)
\ No newline at end of file