code: def get_all_vpcs(self, vpc_ids=None, filters=None):
          
          params = {}
          if vpc_ids:
              self.build_list_params(params, vpc_ids, 'VpcId')
          if filters:
              i = 1
              for filter in filters:
                  params[('Filter.%d.Name' % i)] = filter[0]
                  params[('Filter.%d.Value.1' % i)] = filter[1]
                  i += 1
          return self.get_list('DescribeVpcs', params, [('item', VPC)])
docs: Retrieve information about your VPCs.  You can filter results to
          return information only about those VPCs that match your search
          parameters.  Otherwise, all VPCs associated with your account
          are returned.
  
          :type vpc_ids: list
          :param vpc_ids: A list of strings with the desired VPC ID's
  
          :type filters: list of tuples
          :param filters: A list of tuples containing filters.  Each tuple
                          consists of a filter key and a filter value.
                          Possible filter keys are:
  
                          - *state*, the state of the VPC (pending or available)
                          - *cidrBlock*, CIDR block of the VPC
                          - *dhcpOptionsId*, the ID of a set of DHCP options
  
          :rtype: list
          :return: A list of :class:`boto.vpc.vpc.VPC`