new_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  from __future__ import absolute_import, division, unicode_literals
  
  # Copyright (C) 2018 Ben McGinnes <ben@gnupg.org>
  #
  # This program is free software; you can redistribute it and/or modify it under
  # the terms of the GNU General Public License as published by the Free Software
  # Foundation; either version 2 of the License, or (at your option) any later
  # version.
  #
  # This program is free software; you can redistribute it and/or modify it under
  # the terms of the GNU Lesser General Public License as published by the Free
  # Software Foundation; either version 2.1 of the License, or (at your option)
  # any later version.
  #
  # This program is distributed in the hope that it will be useful, but WITHOUT
  # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  # FOR A PARTICULAR PURPOSE.  See the GNU General Public License and the GNU
  # Lesser General Public Licensefor more details.
  #
  # You should have received a copy of the GNU General Public License and the GNU
  # Lesser General Public along with this program; if not, see
  # <http://www.gnu.org/licenses/>.
  
  import gpg
  import sys
  
  if len(sys.argv) == 3:
      ciphertext = sys.argv[1]
      newfile = sys.argv[2]
  elif len(sys.argv) == 2:
      ciphertext = sys.argv[1]
      newfile = input("Enter path and filename of file to save decrypted data to: ")
  else:
      ciphertext = input("Enter path and filename of encrypted file: ")
      newfile = input("Enter path and filename of file to save decrypted data to: ")
  
  with open(ciphertext, "rb") as cfile:
      plaintext, result, verify_result = gpg.Context().decrypt(cfile)
  
  with open(newfile, "wb") as nfile:
      nfile.write(plaintext)
  
subject: decrypt file