code: def find_definition_urls(self, set_of_links):
          
          definition_dict = {}
          re_link_name = re.compile('.*p_table_name=(\w+)&p_topic.*')
          for link in set_of_links:
              if link.startswith('http://'):
                  table_dict = {}
                  html = urlopen(link).read()
                  doc = lh.fromstring(html)
                  unordered_list = doc.cssselect('#main ul')[-1]
                  for li in unordered_list.iterchildren():
                      a = li.find('a')
                      table_dict.update({a.text: a.attrib['href']})
                  link_name = re_link_name.sub(r'\1', link).upper()
                  definition_dict.update({link_name: table_dict})
          return definition_dict
docs: Find the available definition URLs for the columns in a table.