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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def delete_session_entity_type(project_id, session_id, entity_type_display_name):
 """Delete session entity type with the given entity type display name."""

    import dialogflow_v2 as dialogflow
    session_entity_types_client = dialogflow.SessionEntityTypesClient()

    session_entity_type_name = (
        session_entity_types_client.session_entity_type_path(
            project_id, session_id, entity_type_display_name))

    session_entity_types_client.delete_session_entity_type(
        session_entity_type_name)