import os

def reverse_text(s, splitter='\n\n'):
 return splitter.join(reversed(s.split(splitter)))

def reverse_text_file(file):
 with open(file, 'r+') as f:
  text = reverse_text(f.read())
  f.seek(0)
  f.write(text)
  f.truncate()

reverse_text_file('1.txt')
input('Done')