code: def add(self, domain_accession, domain_type, match_quality):
          '''match_quality should be a value between 0 and 1.'''
          self.matches[domain_type] = self.matches.get(domain_type, {})
          self.matches[domain_type][domain_accession] = match_qualitf add(self, domain_accession, domain_type, match_quality):
          '''match_quality should be a value between 0 and 1.'''
          self.matches[domain_type] = self.matches.get(domain_type, {})
          self.matches[domain_type][domain_accession] = match_quality
docs: match_quality should be a value between 0 and 1.