auto save

diy.py

+with open(r'C:\Users\CM\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as file:
+    a=file.readlines()
+
+final=[]
+for i in a:        
+    data=i.split() 
+    sum=0  #初始化加和变量
+    for j in data[1:]:
+        sum=sum+int(j)
+    result=data[0]+str(sum) #姓名 义卖款总和   
+    final.append(result)
+    
+
+with open(r'C:\Users\CM\Documents\lesson13-1\sales_list.txt','a',encoding='utf-8') as file:
+    a=file.writelines(final)
+ 
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