save project

diy.py

 with open(r'c:\Users\小梦\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as file:
     a = file.readlines()
     #print(a)
-for i in a:
-    data = i.split()
+for i in a:  #遍历每一行
+    data = i.split()  #把字符串分解成更细的字符串
     #print(data[1:])
-    sum = 0
-    for sales in data[1:]:
-        sum = sum+int(sales)
-        result = data[0]+str(sum)
-    print(result)
+    sum = 0  #把总钱数设为0
+    for sales in data[1:]:  #遍历列表中的1和之后的数据
+        sum = sum+int(sales)  #相加，sales是字符串要转换
+    result = data[0]+str(sum)  #学生姓名和总义卖款
+    print(result)  #打印
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