save project

diy.py

 with open(r'c:\Users\张琰\Desktop\sales_list.txt.txt','r',encoding='utf-8')as file:
     a=file.readlines()
+final_sum=[]
 for i in a:
-    b=i.split()
+    date=i.split()
     #print(b[1])
     sum=0
-    for sales in b[1:]:
+    for sales in date[1:]:
         sum=sum+int(sales)
-    c=b[0]+str(sum)
-    print(c)
\ No newline at end of file
+    result=date[0]+str(sum)+'\n'
+    final_sum.append(result)
+with open(r'c:\Users\张琰\Desktop\sales_list.txt.txt','a',encoding='utf-8')as file:
+    file.writelines(final_sum)
\ No newline at end of file