save project

diy.py

 with open(r'c:\Users\玛酷机器人\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as a:
 with open(r'c:\Users\玛酷机器人\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as a:
     c=a.readlines()
     c=a.readlines()
+ 
     for i in c:
     for i in c:
         print(i)
         print(i)
\ No newline at end of file