auto save

diy.py

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