>>> import lxml.html
>>> str1 = """
... <tr>
... <td>99</td>
... <td>Name</td>
... <td>ЕГЭ</td>
... <td>268</td><td>90</td><td>91</td><td>87</td>
... <td></td>
... <td>Копия</td>
... <td>Нет</td>
... </tr>"""
>>> root = lxml.html.fromstring(str1)
>>> [x.text for x in root.xpath('.//td')]
['99', 'Name', 'ЕГЭ', '268', '90', '91', '87', None, 'Копия', 'Нет']