auto save

3.py

 file=open(r'C:\Users\Administrator\test.txt','w',encoding='utf-8')
 file=open(r'C:\Users\Administrator\test.txt','w',encoding='utf-8')
-file.write('小兰，12本')
+file.write('小兰，12本')
\ No newline at end of file
+file.write('小丽，11本')
+file.write('李文，9本')
+file.write('张伟，16本')
+file=cl
\ No newline at end of file