docs: def Seq(sequence, annotations=None, block_length=10, blocks_per_line=6,
          style=DEFAULT_STYLE):
      """
      Pretty-printed sequence object that's displayed nicely in the IPython
      Notebook.
  
      :arg style: Custom CSS as a `format string`, where a selector for the
          top-level ``<pre>`` element is substituted for `{selector}`. See
          :data:`DEFAULT_STYLE` for an example.
      :type style: str
  
      For a description of the other arguments, see
      :func:`monoseq.pprint_sequence`.
      """
      seq_id = 'monoseq-' + binascii.hexlify(os.urandom(4))
      pprinted = pprint_sequence(sequence,
                                 annotations=annotations,
                                 block_length=block_length,
                                 blocks_per_line=blocks_per_line,
                                 format=HtmlFormat)
  
      return HTML('<style>{style}</style><pre id="{seq_id}">{pprinted}</pre>'
                  .format(style=style.format(selector='#' + seq_id),
                          seq_id=seq_id,
                          pprinted=pprinted))