I assume you have data in list
<table>
<tr>
<th>Column1</th>
<th>Column2</th>
<th>Column3</th>
</tr>
% for line in table_lines:
% if <check condition>:
<tr background="black">
% else:
<tr background="white">
% endif
<td>${line.column1}</p>
<td>${line.column2}</td>
<td>${line.column3}</td>
</tr>
% endfor
</table>