old_contents: #!/usr/bin/env python2
  
  """\
  Perform various simple manipulations on DNA sequences.
  
  Usage:
      dna len <seq>
      dna rc <seq>
      dna gc <seq> [--fraction]
  
  Commands:
      len:  Print the length of the given DNA sequence.
      rc:   Print the reverse-complement of the given DNA sequence.
      gc:   Print the GC content of the given DNA sequence.
  
  Arguments:
      <seq>:  The DNA sequence to work with.
  
  Options:
      --fraction 
          For the 'gc' command, display the result as a raw fraction
          (e.g. a number between 0 and 1) rather than a percentage.
  """
  
  from . import dna
  
  def main():
      import docopt
      args = docopt.docopt(__doc__)
      seq = args['<seq>']
  
      if args['len']:
          print len(seq)
      if args['rc']:
          print dna.reverse_complement(seq)
      if args['gc']:
          gc = dna.gc_content(seq)
          if args['--fraction']: print gc
          else: print '{.2f}\%'.format(gc / 100)
  
  
new_contents: #!/usr/bin/env python2
  
  """\
  Perform various simple manipulations on DNA sequences.
  
  Usage:
      dna len <seq>
      dna rc <seq>
      dna gc <seq> [--fraction]
  
  Commands:
      len:  Print the length of the given DNA sequence.
      rc:   Print the reverse-complement of the given DNA sequence.
      gc:   Print the GC content of the given DNA sequence.
  
  Arguments:
      <seq>:  The DNA sequence to work with.
  
  Options:
      --fraction 
          For the 'gc' command, display the result as a raw fraction
          (e.g. a number between 0 and 1) rather than a percentage.
  """
  
  from . import dna
  
  def main():
      import docopt
      args = docopt.docopt(__doc__)
      seq = args['<seq>']
  
      if args['len']:
          print len(seq)
      if args['rc']:
          print dna.reverse_complement(seq)
      if args['gc']:
          gc = dna.gc_content(seq)
          if args['--fraction']: print gc
          else: print '{:.2f}%'.format(gc / 100.)
  
  
subject: Fix a bug in the GC% formatting.