auto save

diy.py

 file1=open(r'C:\Users\dell\Desktop\test.txt','w',encoding='utf-8')
-file1.write('小兰:12本\n')
-file1.write('小李:13本\n')
-file1.write('张伟:16本\n')
-file1.write('小吗:14本\n')
-file1.close()
-file1=open(r'C:\Users\dell\Desktop\test.txt','a',encoding='utf-8')
-file1.write('小强:65本\n')
-file1.write('小王:32本\n')
+file1.write('小兰:12本')
+file1.write('小李:13本')
+file1.write('张伟:16本')
+file1.write('小吗:14本')
 file1.close()
\ No newline at end of file