Python 3 bytes types stored as '>c' in the same way python 2 did.

  These two global attributes are now the same:

  'ran away' and b'ran away'

  From ncdump -h

  :robin = "ran away" ;

  Python 2 returns a string for _attributes['robin'] and python3 returns
a bytes.  So, python 3 users can deal with the encode()/decode() pain like any
other binary string.