auto save

1.py

+with open(r'c:\Users\ThinkPad\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as file1:
+    a=file1.readlines()
+
+file_sum=[]
+for i in a:
+    data=i.split()
+    sum=0
+    for sales in data[1:]:
+        sum= sum + int(sales)
+    result=data[0]+str(sum)+'\n'
+    file_sum.append(result)
+with open(r'c:\Users\ThinkPad\Documents\lesson13-1\sales_list.txt','a',encoding='utf-8') as file1:
+    file1.writelines(file_sum)