old_contents: import datetime
  print datetime.datetime.now()
  print "Put your script of python here."
  print "This is Simple Backdoor in image file, the execute with python programming."
  
new_contents: import datetime
  print datetime.datetime.now()
  print "Put your script of python here."
  print "This is Simple Backdoor in image file, then execute with python programming."
  
subject: Update __main__.py