'Returns a list of `DBParameterGroup` descriptions. If a
`DBParameterGroupName` is specified, the list will contain
only the description of the specified DB parameter group.
:type db_parameter_group_name: string
:param db_parameter_group_name:
The name of a specific DB parameter group to return details for.
Constraints:
+ Must be 1 to 255 alphanumeric characters
+ First character must be a letter
+ Cannot end with a hyphen or contain two consecutive hyphens
: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
`DescribeDBParameterGroups` request. If this parameter is
specified, the response includes only records beyond the marker, up
to the value specified by `MaxRecords`.'

def describe_db_parameter_groups(self, db_parameter_group_name=None, filters=None, max_records=None, marker=None):

    params = {}
    if (db_parameter_group_name is not None):
        params['DBParameterGroupName'] = db_parameter_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='DescribeDBParameterGroups', verb='POST', path='/', params=params)
