old_contents: #!/usr/bin/env python3
  # file: passphrase.py
  # vim:fileencoding=utf-8:ft=python
  #
  # Author: R.F. Smith <rsmith@xs4all.nl>
  # Created: 2015-12-28 12:11:31 +0100
  # Last modified: 2020-10-03T12:20:58+0200
  """
  Creates a passphrase.
  
  It picks words from a word list, and adds filler characters between the words.
  """
  
  import argparse
  import logging
  import secrets
  import re
  import sys
  
  __version__ = "2019.08.13"
  
  wordfiles = {
      "en": "/usr/share/dict/words",
      "nl": "/usr/share/dict/opentaal-210G-basis-gekeurd",
  }
  minwordlen = 4
  maxwordlen = 9
  fillchars = "!@#$%&*_-"
  
  parser = argparse.ArgumentParser(description=__doc__)
  parser.add_argument(
      "--log",
      default="warning",
      choices=["debug", "info", "warning", "error"],
      help="logging level (default: warning)",
  )
  parser.add_argument(
      "-l", "--language", type=str, default="en", help="word file language (default: en)"
  )
  parser.add_argument(
      "-c",
      "--count",
      type=int,
      default=1,
      help="number of passphrases to generate (default: 1)",
  )
  parser.add_argument(
      "-w", "--words", type=int, default=3, help="number of words (default: 3)"
  )
  parser.add_argument("-v", "--version", action="version", version=__version__)
  args = parser.parse_args(sys.argv[1:])
  logging.basicConfig(
      level=getattr(logging, args.log.upper(), None), format="%(levelname)s: %(message)s"
  )
  wf = wordfiles[args.language]
  logging.info("reading words database {}".format(wf))
  with open(wf) as df:
      words = df.readlines()
  rx = re.compile("/[A-Z]+$")
  words = [rx.sub("", w).lower().strip() for w in words]
  logging.info("{} total words in {}".format(len(words), wf))
  words = [w for w in words if minwordlen < len(w) < maxwordlen]
  logging.info("{} words of correct length in {}".format(len(words), wf))
  aantal = len(words) + 1
  for n in range(args.count):
      choices = [secrets.choice(words) for _ in range(args.words)]
      filler = [secrets.choice(fillchars) for _ in range(args.words)]
      phrase = "".join([k for t in zip(choices, filler) for k in t])[:-1]
      print(phrase)
  
new_contents: #!/usr/bin/env python
  # file: passphrase.py
  # vim:fileencoding=utf-8:ft=python
  #
  # Author: R.F. Smith <rsmith@xs4all.nl>
  # Created: 2015-12-28 12:11:31 +0100
  # Last modified: 2020-10-03T12:20:58+0200
  """
  Creates a passphrase.
  
  It picks words from a word list, and adds filler characters between the words.
  """
  
  import argparse
  import logging
  import secrets
  import re
  import sys
  
  __version__ = "2019.08.13"
  
  wordfiles = {
      "en": "/usr/share/dict/words",
      "nl": "/usr/share/dict/opentaal-210G-basis-gekeurd",
  }
  minwordlen = 4
  maxwordlen = 9
  fillchars = "!@#$%&*_-"
  
  parser = argparse.ArgumentParser(description=__doc__)
  parser.add_argument(
      "--log",
      default="warning",
      choices=["debug", "info", "warning", "error"],
      help="logging level (default: warning)",
  )
  parser.add_argument(
      "-l", "--language", type=str, default="en", help="word file language (default: en)"
  )
  parser.add_argument(
      "-c",
      "--count",
      type=int,
      default=1,
      help="number of passphrases to generate (default: 1)",
  )
  parser.add_argument(
      "-w", "--words", type=int, default=3, help="number of words (default: 3)"
  )
  parser.add_argument("-v", "--version", action="version", version=__version__)
  args = parser.parse_args(sys.argv[1:])
  logging.basicConfig(
      level=getattr(logging, args.log.upper(), None), format="%(levelname)s: %(message)s"
  )
  wf = wordfiles[args.language]
  logging.info("reading words database {}".format(wf))
  with open(wf) as df:
      words = df.readlines()
  rx = re.compile("/[A-Z]+$")
  words = [rx.sub("", w).lower().strip() for w in words]
  logging.info("{} total words in {}".format(len(words), wf))
  words = [w for w in words if minwordlen < len(w) < maxwordlen]
  logging.info("{} words of correct length in {}".format(len(words), wf))
  aantal = len(words) + 1
  for n in range(args.count):
      choices = [secrets.choice(words) for _ in range(args.words)]
      filler = [secrets.choice(fillchars) for _ in range(args.words)]
      phrase = "".join([k for t in zip(choices, filler) for k in t])[:-1]
      print(phrase)
  
subject: Change python3 to python.