auto save

demo.py

+file2 = open(r"C:\Users\XNBC\Desktop\古诗.txt",'w',encoding='utf-8')
+file2.write("蓝田日暖玉生烟\n")
+file2.write("蓝田日暖玉生烟\n")
+file2.write("蓝田日暖玉生烟\n")
+file2.write("蓝田日暖玉生烟\n")
+file2.write("蓝田日暖玉生烟\n")
+file2.write("此情可待成追忆")
+file2.close()
\ No newline at end of file

diy.py

+file1 = open(r"c:\Users\XNBC\Documents\lesson13-1\sales_list.txt",'r',encoding='utf-8')
+a = file1.readlines()
+finall = []
+for i in a:
+    data = i.split()
+    sum = 0
+    for j in data[1:]:
+        sum = sum + int(j)
+    result = data[0] + str(sum) + '\n'
+    finall.append(result)
+file1.close()
+
+file2 = open(r"C:\Users\XNBC\Desktop\new_list.txt",'w',encoding='utf-8')
+file2.writelines(finall)
+file2.close()
\ No newline at end of file