save project

diy.py

 with open(r'\Users\BBTC\Desktop\sales_list.txt','r',encoding='utf-8') as file:
     a=file.readlines()
+f=[]
 for i in a:
     data=i.split()
     s=0
     for e in data[1:]:
         s=s+int(e)
-    r=data[0]+str(s)
-    print(r)
+    r=data[0]+':'+str(s)+'\n'
+    f.append(r)
+with open(r'\Users\BBTC\Desktop\sales_list.txt','a',encoding='utf-8') as file:
+    file.writelines(f)
        
\ No newline at end of file