code: def to_frame(self, **kwargs):
          r
          df = export.write_dataframe(self._values, **kwargs)
          df.name = self.title
          return df
docs: r"""Return a pandas DataFrame loaded from the worksheet data.
  
          Args:
              \**kwargs: passed to ``pandas.read_csv()`` (e.g. ``header``, ``index_col``)
          Returns:
              pandas.DataFrame: new ``DataFrame`` instance