save project

diy.py

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