code: def update_authors(self):
          
          author_names = record_get_field_instances(self.record, '100')
          author_names.extend(record_get_field_instances(self.record, '700'))
          for field in author_names:
              subs = field_get_subfields(field)
              for idx, (key, value) in enumerate(field[0]):
                  if key == 'a':
                      field[0][idx] = ('a', value.replace(".", " ").strip())
                  elif key == 'v':
                      del field[0][idx]
              if subs.get("u", None) == "CERN":
                  self.tag_as_cern = True
docs: 100 & 700 punctuate author names.