How to use the capirca.lib.gce.GceFirewallError function in capirca

if not self.term.source_address and not self.term.source_tag:
        raise GceFirewallError(
            'Ingress rule missing required field oneof "sourceRanges" or '
            '"sourceTags".')

      if self.term.destination_address:
        raise GceFirewallError('Ingress rules cannot include '
                               '"destinationRanges.')

    elif self.term.direction == 'EGRESS':
      if self.term.source_address:
        raise GceFirewallError(
            'Egress rules cannot include "sourceRanges".')

      if not self.term.destination_address:
        raise GceFirewallError(
            'Egress rule missing required field "destinationRanges".')

      if self.term.destination_tag:
        raise GceFirewallError(
            'GCE Egress rule cannot have destination tag.')

dest_addr_chunks = [
          daddrs[x:x+self._TERM_ADDRESS_LIMIT] for x in range(
              0, len(daddrs), self._TERM_ADDRESS_LIMIT)]
      for i, chunk in enumerate(dest_addr_chunks):
        rule = copy.deepcopy(proto_dict)
        if len(dest_addr_chunks) > 1:
          rule['name'] = '%s-%d' % (rule['name'], i+1)
        rule['destinationRanges'] = [str(daddr) for daddr in chunk]
        rules.append(rule)
    else:
      rules.append(proto_dict)

    # Sanity checking term name lengths.
    long_rules = [rule['name'] for rule in rules if len(rule['name']) > 63]
    if long_rules:
      raise GceFirewallError(
          'GCE firewall name ended up being too long: %s' % long_rules)
    return rules

def _validateDirection(self):
    if self.term.direction == 'INGRESS':
      if not self.term.source_address and not self.term.source_tag:
        raise GceFirewallError(
            'Ingress rule missing required field oneof "sourceRanges" or '
            '"sourceTags".')

      if self.term.destination_address:
        raise GceFirewallError('Ingress rules cannot include '
                               '"destinationRanges.')

    elif self.term.direction == 'EGRESS':
      if self.term.source_address:
        raise GceFirewallError(
            'Egress rules cannot include "sourceRanges".')

      if not self.term.destination_address:
        raise GceFirewallError(
            'Egress rule missing required field "destinationRanges".')

def __init__(self, term):
    super(Term, self).__init__(term)
    self.term = term

    self._validateDirection()
    if self.term.source_address_exclude and not self.term.source_address:
      raise GceFirewallError(
          'GCE firewall does not support address exclusions without a source '
          'address list.')
    if (not self.term.source_address and
        not self.term.source_tag) and self.term.direction == 'INGRESS':
      raise GceFirewallError(
          'GCE firewall needs either to specify source address or source tags.')
    if self.term.source_port:
      raise GceFirewallError(
          'GCE firewall does not support source port restrictions.')
    if (self.term.source_address_exclude and self.term.source_address or
        self.term.destination_address_exclude and
        self.term.destination_address):
      self.term.FlattenAll()
      if not self.term.source_address and self.term.direction == 'INGRESS':
        raise GceFirewallError(
            'GCE firewall rule no longer contains any source addresses after '
            'the prefixes in source_address_exclude were removed.')
      if not self.term.destination_address and self.term.direction == 'EGRESS':
        raise GceFirewallError(
            'GCE firewall rule no longer contains any destination addresses '
            'after the prefixes in destination_address_exclude were removed.')

def _validateDirection(self):
    if self.term.direction == 'INGRESS':
      if not self.term.source_address and not self.term.source_tag:
        raise GceFirewallError(
            'Ingress rule missing required field oneof "sourceRanges" or '
            '"sourceTags".')

      if self.term.destination_address:
        raise GceFirewallError('Ingress rules cannot include '
                               '"destinationRanges.')

    elif self.term.direction == 'EGRESS':
      if self.term.source_address:
        raise GceFirewallError(
            'Egress rules cannot include "sourceRanges".')

      if not self.term.destination_address:
        raise GceFirewallError(
            'Egress rule missing required field "destinationRanges".')

      if self.term.destination_tag:
        raise GceFirewallError(
            'GCE Egress rule cannot have destination tag.')

def _validateDirection(self):
    if self.term.direction == 'INGRESS':
      if not self.term.source_address and not self.term.source_tag:
        raise GceFirewallError(
            'Ingress rule missing required field oneof "sourceRanges" or '
            '"sourceTags".')

      if self.term.destination_address:
        raise GceFirewallError('Ingress rules cannot include '
                               '"destinationRanges.')

    elif self.term.direction == 'EGRESS':
      if self.term.source_address:
        raise GceFirewallError(
            'Egress rules cannot include "sourceRanges".')

      if not self.term.destination_address:
        raise GceFirewallError(
            'Egress rule missing required field "destinationRanges".')

      if self.term.destination_tag:
        raise GceFirewallError(
            'GCE Egress rule cannot have destination tag.')

if self.term.destination_address:
        raise GceFirewallError('Ingress rules cannot include '
                               '"destinationRanges.')

    elif self.term.direction == 'EGRESS':
      if self.term.source_address:
        raise GceFirewallError(
            'Egress rules cannot include "sourceRanges".')

      if not self.term.destination_address:
        raise GceFirewallError(
            'Egress rule missing required field "destinationRanges".')

      if self.term.destination_tag:
        raise GceFirewallError(
            'GCE Egress rule cannot have destination tag.')

term.name = self.FixTermLength(term.name)
        if term.name in term_names:
          raise GceFirewallError('Duplicate term name')
        term_names.add(term.name)

        term.direction = direction
        if term.expiration:
          if term.expiration <= exp_info_date:
            logging.info('INFO: Term %s in policy %s expires '
                         'in less than two weeks.', term.name, filter_name)
          if term.expiration <= current_date:
            logging.warn('WARNING: Term %s in policy %s is expired and '
                         'will not be rendered.', term.name, filter_name)
            continue
        if term.option:
          raise GceFirewallError(
              'GCE firewall does not support term options.')

        self.gce_policies.append(Term(term))

dest_addr_chunks = [
          daddrs[x:x+self._TERM_ADDRESS_LIMIT] for x in range(
              0, len(daddrs), self._TERM_ADDRESS_LIMIT)]
      for i, chunk in enumerate(dest_addr_chunks):
        rule = copy.deepcopy(proto_dict)
        if len(dest_addr_chunks) > 1:
          rule['name'] = '%s-%d' % (rule['name'], i+1)
        rule['destinationRanges'] = [str(daddr) for daddr in chunk]
        rules.append(rule)
    else:
      rules.append(proto_dict)

    # Sanity checking term name lengths.
    long_rules = [rule['name'] for rule in rules if len(rule['name']) > 63]
    if long_rules:
      raise GceFirewallError(
          'GCE firewall name ended up being too long: %s' % long_rules)
    return rules

def __init__(self, term):
    super(Term, self).__init__(term)
    self.term = term

    self._validateDirection()
    if self.term.source_address_exclude and not self.term.source_address:
      raise GceFirewallError(
          'GCE firewall does not support address exclusions without a source '
          'address list.')
    if (not self.term.source_address and
        not self.term.source_tag) and self.term.direction == 'INGRESS':
      raise GceFirewallError(
          'GCE firewall needs either to specify source address or source tags.')
    if self.term.source_port:
      raise GceFirewallError(
          'GCE firewall does not support source port restrictions.')
    if (self.term.source_address_exclude and self.term.source_address or
        self.term.destination_address_exclude and
        self.term.destination_address):
      self.term.FlattenAll()
      if not self.term.source_address and self.term.direction == 'INGRESS':
        raise GceFirewallError(
            'GCE firewall rule no longer contains any source addresses after '