save project

diy.py

 with open(r"c:\Users\23636\Documents\lesson13_2\sales_list.txt",'r',encoding='utf-8') as feli:
     a=feli.readlines()#读取数据，放到变量a里
     #print(a)
+rew_sum[]
 for i in a:
     data=i.split()#用for...in...把每一行的数据遍历
     sum=0#把字符串
@@ -8,3 +9,7 @@ for i in a:
         sum=sum+int(salse)
     salse=data[0]+str(sum)
     print(salse)
+    rew_sum.append(selse)
+with open(r"c:\Users\23636\Documents\lesson13_2\sales_list.txt",'r',encoding='utf-8')as feli:
+feli.writelines(rew_sum)
+

new_write.py

+a["悟空在学pythan/n]
+with open(r"c:\Users\23636\Documents\lesson13_2\jntm.txt",'a',encoding='utf-8')
+    feli.writelines(a)