'Finds a subnode in the glossary and retrieves a value of this.
Filter by QualysId.
@return An attribute value'

def get_text_from_glossary(self, tag):

    for vuln_detail in self.glossary:
        id_act = vuln_detail.get('id').strip('qid_')
        if (id_act == self.name):
            text = vuln_detail.find(tag)
            if (text is not None):
                return cleaner_unicode(text.text)
            else:
                return None
