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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_uris(self, base_uri, filter_list=None):
 """Return a set of internal URIs."""

        return {
            re.sub(r'^/', base_uri, link.attrib['href'])
            for link in self.parsedpage.get_nodes_by_selector('a')
            if 'href' in link.attrib and (
                link.attrib['href'].startswith(base_uri) or
                link.attrib['href'].startswith('/')
            ) and
            not is_uri_to_be_filtered(link.attrib['href'], filter_list)
        }