How to use the azure-servicebus.azure.servicebus.models.Topic function in azure-servicebus

The xml format for topic:

    <content type="application/xml">
    
        P10675199DT2H48M5.4775807S
        1024
        false
        P7D
        true
    
    </content>

    '''
    topic = Topic()

    invalid_topic = True

    topic_element = entry_element.find('./atom:content/sb:TopicDescription', _etree_sb_feed_namespaces)
    if topic_element is not None:
        mappings = [
            ('DefaultMessageTimeToLive', 'default_message_time_to_live', None),
            ('MaxSizeInMegabytes', 'max_size_in_megabytes', int),
            ('RequiresDuplicateDetection', 'requires_duplicate_detection', _parse_bool),
            ('DuplicateDetectionHistoryTimeWindow', 'duplicate_detection_history_time_window', None),
            ('EnableBatchedOperations', 'enable_batched_operations', _parse_bool),
            ('SizeInBytes', 'size_in_bytes', int),
        ]

        for map in mappings:
            if _read_etree_element(topic_element, map[0], topic, map[1], map[2]):