auto save

diy.py

+with open(r'C:\Users\Administrator\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as file:
+    a=file.readlines()
+
+for i in a:
+    data = i.split()
+    sum = 0
+    #print(data[0]) 
+    #print(data[1:])\
+    for sales in data[1:]:
+        sum=sum+int(sales)
+    result = data[0]+str(sum)  
+    print(result)  
+    with open(r'C:\Users\Administrator\Documents\hello.txt','a',encoding='utf-8') as file:
+        file.writelines(result+'\n')
+   

ef.py

+a=['你好呀\n','悟空\n''我在贝尔编程学python\n']
+with open(r'C:\Users\Administrator\Documents\hello.txt','a',encoding='utf-8') as file:
+    file.writelines(a)
+
+result =    
+