'Returns a list of `DBSecurityGroup` descriptions. If a
`DBSecurityGroupName` is specified, the list will contain only
the descriptions of the specified DB security group.
:type db_security_group_name: string
:param db_security_group_name: The name of the DB security group to
return details for.
:type filters: list
:param filters:
:type max_records: integer
:param max_records: The maximum number of records to include in the
response. If more records exist than the specified `MaxRecords`
value, a pagination token called a marker is included in the
response so that the remaining results may be retrieved.
Default: 100
Constraints: minimum 20, maximum 100
:type marker: string
:param marker: An optional pagination token provided by a previous
DescribeDBSecurityGroups request. If this parameter is specified,
the response includes only records beyond the marker, up to the
value specified by `MaxRecords`.'

def describe_db_security_groups(self, db_security_group_name=None, filters=None, max_records=None, marker=None):

    params = {}
    if (db_security_group_name is not None):
        params['DBSecurityGroupName'] = db_security_group_name
    if (filters is not None):
        self.build_complex_list_params(params, filters, 'Filters.member', ('FilterName', 'FilterValue'))
    if (max_records is not None):
        params['MaxRecords'] = max_records
    if (marker is not None):
        params['Marker'] = marker
    return self._make_request(action='DescribeDBSecurityGroups', verb='POST', path='/', params=params)
