text: #!/usr/bin/env python3
  # -*- coding=utf-8 -*-
  
  from  datetime import datetime
  
  with open('test.txt','w') as f:
      f.write('今天是:')
      f.write(datetime.now().strftime('%Y-%m-%d'))
  
  with open('test.txt','r') as f:
      s = f.read()
      print('open for read')
      print(s)
  
  with open('test.txt','rb') as f:
      s = f.read()
      print('open as binary for read....')
      print(s)
  