save project

diy.py

 with open(r"C:\Users\Administrator\Documents\sales_list.txt.txt","r",encoding='utf-8') as file:
     a=file.readlines()
 for i in a:
-    print(i)
-for i in a:
     date=i.split()
-    print(date[0])
-    print(date[1:])
-num=0
-for fo in date[1:]:
-    num+=int(fo)
-c=date[0]
-b=str(c)+str(num)
-print(b)
+    k=[]
+    num=0
+    for sales in date[1:]:
+        num=num+int(sales)
+    n=date[0]+str(num)
+    k.append(n)
+with open(r"C:\Users\Administrator\Documents\sales_list.txt.txt","a",encoding='utf-8') as file:
+    file.writelines(k)