auto save

diy.py

-with open(r"c:\Users\23636\Documents\lesson13_2\sales_list.txt",'r',encoding='utf-8') as life:
-    a=feli.readlines()
+with open(r"c:\Users\23636\Documents\lesson13_2\sales_list.txt",'r',encoding='utf-8') as feli:
+    a=feli.readlines()#读取数据，放到变量a里
     #print(a)
     #print(a)
-
 for i in a:
 for i in a:
-    data=i.split()
-    sum=0
-    for salse in data[1:]:
+    data=i.split()#用for...in...把每一行的数据遍历
+    sum=0#把字符串
+    for salse in data[1:]:#第一个数据和
         sum=sum+int(salse)
         sum=sum+int(salse)
-    print()
+    salse=data[0]+str(sum)
+    print(salse)