code: def dump(mer_file, output_file='counts.fasta', options='', returncmd=False):
      
      cmd = 'jellyfish dump {} -o {} {}'.format(mer_file, output_file, options)
      out, err = accessoryfunctions.run_subprocess(cmd)
      if returncmd:
          return out, err, cmd
      else:
          return out, err
docs: Dumps output from jellyfish count into a human-readable format.
      :param mer_file: Output from jellyfish count.
      :param output_file: Where to store output. Default counts.fasta
      :param options: Other options to pass to jellyfish. Input should be a string, with options typed as they would be
      on the command line.
      :param returncmd: If set to true, function will return the cmd string passed to subprocess as a third value.
      :return: Stdout and stderr from calling jellyfish.