def update_figures(selected_item_topics, selected_ages, start_date, end_date):

    start_date = dt.strptime(start_date, '%Y-%m-%d')
    end_date = dt.strptime(end_date, '%Y-%m-%d')

    #применяем фильтрацию
    visits_filtered = dash_visits.query('item_topic.isin(@selected_item_topics) and dt >= @start_date and dt <= @end_date and age_segment.isin(@selected_ages)')

    engagement_filtered = dash_engagement.query('item_topic.isin(@selected_item_topics) and dt >= @start_date and dt <= @end_date and age_segment.isin(@selected_ages)')

    #данные для графиков
    visits_by_item_topic = (visits_filtered.groupby(['item_topic','dt'])
                                           .agg({'visits' : 'sum'})
                                           .sort_values(by = 'visits', ascending = False)
                                           .reset_index())

    visits_by_source_topic = (visits_filtered.groupby('source_topic')
                                             .agg({'visits' : 'sum'})
                                             .reset_index())

    engagement = (engagement_filtered.groupby('event')
                                     .agg({'unique_users' : 'mean'})
                                     .rename(columns = {'unique_users' : 'avg_unique_users'})
                                     .sort_values(by = 'avg_unique_users', ascending = False)
                                     .reset_index())

    data_item_topic_dropdown = []

    #график истории событий по темам карточек
    for item in visits_by_item_topic['item_topic'].unique():
        current = visits_by_item_topic[visits_by_item_topic['item_topic'] == item]
        data_item_topic_dropdown += [go.Scatter(x = current['dt'],
                                   y = current['visits'],
                                   mode = 'lines',
                                   stackgroup = 'one',
                                   name = item)
                        ]

    #график разбивки событий по темам источников
    data_pie_source_topic = [go.Pie(labels = visits_by_source_topic['source_topic'],
                                    values = visits_by_source_topic['visits'])

                        ]

    #график средней глубины взаимодействия
    data_engagement_graph = [go.Bar(x = engagement['event'],
                                   y = engagement['avg_unique_users'],
                                   name = 'Среднее количество уникальных пользователей')
                        ]



    return (