old_contents: #!/usr/bin/env python
  
  import sys
  from pyxl.codec.tokenizer import pyxl_tokenize, pyxl_untokenize
  
  f = open(sys.argv[1], 'r')
  print pyxl_untokenize(pyxl_tokenize(f.readline)),
  
new_contents: #!/usr/bin/env python
  
  import sys
  from pyxl.codec.tokenizer import pyxl_tokenize, pyxl_untokenize
  
  f = open(sys.argv[1], 'r')
  print(pyxl_untokenize(pyxl_tokenize(f.readline)), end='')
  
subject: Convert scripts/parse_file.py to Python 3.