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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 getGroupUpcomingEvents(request, group):
 """ Return all the upcoming events that are assigned to the specified group. :param request: Django request object :param group: for this group page :rtype: list of the namedtuple ThisEvent (title, page, url) """

    # Get events that are a child of a group page, or a postponement or extra
    # info a child of the recurring event child of the group
    rrEvents = RecurringEventPage.events(request).exclude(group_page=group) \
                                        .upcoming().child_of(group).this()
    qrys = [SimpleEventPage.events(request).exclude(group_page=group)
                                        .upcoming().child_of(group).this(),
            MultidayEventPage.events(request).exclude(group_page=group)
                                        .upcoming().child_of(group).this(),
            rrEvents]
    for rrEvent in rrEvents:
        qrys += [PostponementPage.events(request).child_of(rrEvent.page)
                                         .upcoming().this(),
                 ExtraInfoPage.events(request).exclude(extra_title="")
                                 .child_of(rrEvent.page).upcoming().this()]

    # Get events that are linked to a group page, or a postponement or extra
    # info a child of the recurring event linked to a group
    rrEvents = group.recurringeventpage_set(manager='events').auth(request)  \
                                                        .upcoming().this()
    qrys += [group.simpleeventpage_set(manager='events').auth(request)
                                                        .upcoming().this(),
             group.multidayeventpage_set(manager='events').auth(request)
                                                        .upcoming().this(),
             rrEvents]
    for rrEvent in rrEvents:
        qrys += [PostponementPage.events(request).child_of(rrEvent.page)
                                                       .upcoming().this(),
                 ExtraInfoPage.events(request).exclude(extra_title="")
                                 .child_of(rrEvent.page).upcoming().this()]
    events = sorted(chain.from_iterable(qrys),
                    key=attrgetter('page._upcoming_datetime_from'))
    return events