code: def exact_ipv4_match(self, field, values):
          
          if len(values) > 1:
              v = ['ipv4("%s")' % ip for ip in values]
              value='{} IN union({})'.format(field, ','.join(v))
          else:
              value='{} == ipv4("{}")'.format(field, values[0])
          
          self.update_filter(value)
docs: An exact IPv4 address match on relevant address fields.
          
          :param str field: name of field to filter on. Taken from 'Show Filter
              Expression' within SMC.
          :param list values: value/s to add. If more than a single value is
              provided, the query is modified to use UNION vs. ==
          :param bool complex: A complex filter is one which requires AND'ing
              or OR'ing values. Set to return the filter before committing.