code: def get_hgnc_entry(hgnc_id):
      
      url = hgnc_url + 'hgnc_id/%s' % hgnc_id
      headers = {'Accept': '*/*'}
      res = requests.get(url, headers=headers)
      if not res.status_code == 200:
          return None
      xml_tree = ET.XML(res.content, parser=UTB())
      return xml_tree
docs: Return the HGNC entry for the given HGNC ID from the web service.
  
      Parameters
      ----------
      hgnc_id : str
          The HGNC ID to be converted.
  
      Returns
      -------
      xml_tree : ElementTree
          The XML ElementTree corresponding to the entry for the
          given HGNC ID.