auto save

diy.py

 with open(r'c:\Users\chen\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as file:
 with open(r'c:\Users\chen\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as file:
-    a=file.read()
-    print(a)
+    a=file.readlines()
+    #print(a)
\ No newline at end of file
+list_sum=[]
+for i in a:
+    data=i.split()
+    sum=0
+    for sales in data[1:]:
+        sum=sum+int(sales)
+    r=data[0]+str(sum)+'\n'
+    list_sum.append(r)
+#写入文件
+with open(r'c:\Users\chen\Documents\lesson13-1\sales_list.txt','a',encoding='utf-8') as file:
+    file.writelines(list_sum)
\ No newline at end of file

sales_list.txt

@@ -10,4 +10,4 @@
 刘若若 11 11 13 11 20 15 13 29 24 
 刘若若 11 11 13 11 20 15 13 29 24 
 刘阳 11 15 22 11 23 26 22 15 17 52 12
 刘阳 11 15 22 11 23 26 22 15 17 52 12
 王胜男 27 15 15 26 13 12 15
 王胜男 27 15 15 26 13 12 15
-王娇 12 11 12 12 15 35 23 11
+王娇 12 11 12 12 15 35 23 11
\ No newline at end of file