'A Legacy Excel Spreadsheet representation of the :class:`Dataset` object, with :ref:`separators`. Cannot be set.
.. note::
XLS files are limited to a maximum of 65,000 rows. Use :class:`Dataset.xlsx` to avoid this limitation.
.. admonition:: Binary Warning
:class:`Dataset.xls` contains binary data, so make sure to write in binary mode::
with open(\'output.xls\', \'wb\') as f:
f.write(data.xls)'

@property
def xls():

    pass
