How to use the tabulate.TableFormat function in tabulate

def test_custom_tablefmt():
    "Regression: allow custom TableFormat that specifies with_header_hide (github issue #20)"
    tablefmt = TableFormat(
        lineabove=Line("", "-", "  ", ""),
        linebelowheader=Line("", "-", "  ", ""),
        linebetweenrows=None,
        linebelow=Line("", "-", "  ", ""),
        headerrow=DataRow("", "  ", ""),
        datarow=DataRow("", "  ", ""),
        padding=0,
        with_header_hide=["lineabove", "linebelow"],
    )
    rows = [["foo", "bar"], ["baz", "qux"]]
    expected = "\n".join(["A    B", "---  ---", "foo  bar", "baz  qux"])
    result = tabulate(rows, headers=["A", "B"], tablefmt=tablefmt)
    assert_equal(result, expected)

if show_relations:
        _print('Relations:')

        entities = graph['entities']
        relations_data = [
            [
                entities[rel['subject']]['head'].lower(),
                rel['relation'].lower(),
                entities[rel['object']]['head'].lower()
            ]
            for rel in graph['relations']
        ]
        _print(tabulate.tabulate(relations_data, headers=['Subject', 'Relation', 'Object'], tablefmt=_tabulate_format))


_tabulate_format = tabulate.TableFormat(
        lineabove=tabulate.Line("+", "-", "+", "+"),
        linebelowheader=tabulate.Line("|", "-", "+", "|"),
        linebetweenrows=None,
        linebelow=tabulate.Line("+", "-", "+", "+"),
        headerrow=tabulate.DataRow("|", "|", "|"),
        datarow=tabulate.DataRow("|", "|", "|"),
        padding=1, with_header_hide=None
)

"""Get the styled text for a *field* using *token* type."""
                s = StringIO()
                formatter.format(((token, field),), s)
                return s.getvalue()

            def addColorInElt(elt):
                if not elt:
                    return elt
                if elt.__class__ == tabulate.Line:
                    return tabulate.Line(*(style_field(table_separator_token, val) for val in elt))
                if elt.__class__ == tabulate.DataRow:
                    return tabulate.DataRow(*(style_field(table_separator_token, val) for val in elt))
                return elt

            srcfmt = tabulate._table_formats[format_name]
            newfmt = tabulate.TableFormat(
                *(addColorInElt(val) for val in srcfmt))
            tabulate._table_formats[format_name] = newfmt

        return iter(data), headers
    return style_output

def to_latex(self):
        from tabulate import _latex_line_begin_tabular, Line, TableFormat
        latex_table_format = TableFormat(
            lineabove=_latex_line_begin_tabular,
            linebelowheader=Line("\\hline", "", "", ""),
            linebetweenrows=None,
            linebelow=Line("\\hline\n\\end{tabular}", "", "", ""),
            headerrow=latexrow_with_rowfunc(self.latex_build_headerrow),
            datarow=latexrow_with_rowfunc(self.latex_build_datarow),
            padding=1, with_header_hide=None)
        
        header, body = self.get_data()
        return self.tabulate(header, body,
                             tablefmt=latex_table_format,
                             floatfmt=self.floatfmt)