How to use the cssselect.parser._unicode function in cssselect

def xpath(css):
            return _unicode(GenericTranslator().css_to_xpath(css, prefix=''))

def parse_pseudo(css):
            result = []
            for selector in parse(css):
                pseudo = selector.pseudo_element
                # No Symbol here
                assert pseudo is None or type(pseudo) is _unicode
                selector = repr(selector.parsed_tree).replace("(u'", "('")
                result.append((selector, pseudo))
            return result

def parse_pseudo(css):
            result = []
            for selector in parse(css):
                pseudo = selector.pseudo_element
                pseudo = _unicode(pseudo) if pseudo else pseudo
                # No Symbol here
                assert pseudo is None or type(pseudo) is _unicode
                selector = repr(selector.parsed_tree).replace("(u'", "('")
                result.append((selector, pseudo))
            return result

def xpath(css):
            return _unicode(CustomTranslator().css_to_xpath(css))

def parse_pseudo(css):
            result = []
            for selector in parse(css):
                pseudo = selector.pseudo_element
                pseudo = _unicode(pseudo) if pseudo else pseudo
                # No Symbol here
                assert pseudo is None or type(pseudo) is _unicode
                selector = repr(selector.parsed_tree).replace("(u'", "('")
                result.append((selector, pseudo))
            return result

def xpath(css):
            return _unicode(GenericTranslator().css_to_xpath(css, prefix=''))