Python urwid.SimpleListWalker() Examples

def _build_list(self):
        choices = get_related_choices(self.session, self.modelclass, self.metadata, None)

        #listbox.body.remove(listentry)

        #choices.update(self.currentvalue)
        wlist = []
#        current = self.currentvalue
#        for pk, cobj in choices.items():
#            if pk in current:
#                but = urwid.CheckBox(str(cobj), state=True)
#            else:
#                but = urwid.CheckBox(str(cobj), state=False)
#            urwid.connect_signal(but, 'change', self._multi_select, (pk, cobj))
#            wlist.append(but)
#        return urwid.ListBox(urwid.SimpleListWalker(wlist)) 

def build(self):
        header = urwid.Pile([
                urwid.AttrMap(urwid.Text("Edit {}".format(self.modelclass.__name__)), "formhead"),
                urwid.AttrMap(urwid.Text("Arrow keys navigate, Enter to select form button. Type into other fields."), "formhead"),
                urwid.Divider(),
                ])
        formstack = []
        for colname in ("name", "address", "country", "contact", "notes"):
            colmd = self.metadata[colname]
            wid = self.build_input(colmd, getattr(self.row, colmd.colname))
            formstack.append(wid)
        colmd = self.metadata["attributes"]
        wid = self.build_attribute_input(colmd, getattr(self.row, colmd.colname))
        formstack.append(wid)
        # common buttons
        formstack.append(self.get_form_buttons())
        listbox = urwid.ListBox(urwid.SimpleListWalker(formstack))
        return urwid.Frame(urwid.AttrMap(listbox, 'body'), header=header) 

def build(self):
        header = urwid.Pile([
                urwid.AttrMap(urwid.Text("Edit Interface"), "formhead"),
                urwid.AttrMap(urwid.Text("Arrow keys navigate, Enter to select form button. Type into other fields."), "formhead"),
                urwid.Divider(),
                ])
        formstack = []
        for groupname, group in [
                (None, ("name", "alias", "ifindex", "description")),
                ("Network Address", ("ipaddr",)),
                ("Media Access Address", ("macaddr", "vlan")),
                ("Extra Info", ("interface_type", "mtu", "speed")),
                ("Administrative", ("status",)),
                ("Associations", ("network", "equipment", "parent", "subinterfaces")),
                ]:
            if groupname:
                formstack.append(self.build_divider(groupname))
            for colname in group:
                colmd = self.metadata[colname]
                wid = self.build_input(colmd, getattr(self.row, colmd.colname))
                formstack.append(wid)
        formstack.append(self.get_form_buttons())
        listbox = urwid.ListBox(urwid.SimpleListWalker(formstack))
        return urwid.Frame(urwid.AttrMap(listbox, 'body'), header=header) 

def build(self):
        header = urwid.Pile([
                urwid.AttrMap(urwid.Text("Create Interface"), "formhead"),
                urwid.AttrMap(urwid.Text("Arrow keys navigate, Enter to select form button. Type into other fields."), "formhead"),
                urwid.Divider(),
                ])
        formstack = []
        for groupname, group in [
                (None, ("name", "alias", "ifindex", "description")),
                ("Network Address", ("ipaddr",)),
                ("Media Access Address", ("macaddr", "vlan")),
                ("Extra Info", ("interface_type", "mtu", "speed")),
                ("Administrative", ("status",)),
                ("Associations", ("network", "parent")),
                ]:
            if groupname:
                formstack.append(self.build_divider(groupname))
            for colname in group:
                colmd = self.metadata[colname]
                wid = self.build_input(colmd)
                formstack.append(wid)
        formstack.append(self.get_form_buttons(create=True))
        listbox = urwid.ListBox(urwid.SimpleListWalker(formstack))
        return urwid.Frame(urwid.AttrMap(listbox, 'body'), header=header) 

def build(self):
        header = urwid.Pile([
                urwid.AttrMap(urwid.Text("Create Corporation"), "formhead"),
                urwid.AttrMap(urwid.Text(
                        "Arrow keys navigate,"
                        "Owner is optional, it serves as a lock on the environment. "
                        "Usually you should leave it as None."), "formhead"),
                urwid.Divider(),
                ])
        formstack = []
        for colname in ("name", "address", "country", "contact", "notes"):
            colmd = self.metadata[colname]
            wid = self.build_input(colmd)
            formstack.append(wid)
        formstack.append(self.get_form_buttons(create=True))
        listbox = urwid.ListBox(urwid.SimpleListWalker(formstack))
        return urwid.Frame(urwid.AttrMap(listbox, 'body'), header=header) 

def __init__(self, parent):

        self.text = (
            "{}\n\nThe hosts are accessible to the installer. "
            "The next step is to 'probe' the hosts to validate their "
            "configuration is usable.".format(self.title)
        )

        self.probe_btn = ui_button(label='Probe', align='center',
                                   callback=self.probe)
        self.next_btn = ui_button(label='Next', align='right',
                                  callback=self.next_page)

        self.table_body = urwid.SimpleListWalker([])
        self.table = urwid.ListBox(self.table_body)
        self.table_footer = urwid.Text(
            "Use arrow keys to move, 'space' to toggle the use of a host")
        self.probed = False

        UIBaseClass.__init__(self, parent) 

def build(self):
        header = urwid.Pile([
                urwid.AttrMap(urwid.Text("Create Environment"), "formhead"),
                urwid.AttrMap(urwid.Text(
                        "Arrow keys navigate,"
                        "Owner is optional, it serves as a lock on the environment. "
                        "Usually you should leave it as None."), "formhead"),
                urwid.Divider(),
                ])
        formstack = []
        for colname in ("name", "owner"):
            colmd = self.metadata[colname]
            wid = self.build_input(colmd)
            formstack.append(wid)
        formstack.append(self.get_form_buttons(create=True))
        listbox = urwid.ListBox(urwid.SimpleListWalker(formstack))
        return urwid.Frame(urwid.AttrMap(listbox, 'body'), header=header) 

def __init__(self, app):
        self.app = app
        self.walker = urwid.SimpleListWalker([])
        for log_record in logger.get_logs():
            self._append_log(log_record)
        logger.on_log_event += self._append_log
        self.listbox = urwid.ListBox(self.walker)

        self.debug_data = urwid.Text('')

        super(DebugPage, self).__init__([
            ('pack', self.debug_data),
            ('pack', urwid.Text('')),
            ('pack', urwid.Text('Hit "Enter" to copy selected message to clipboard.')),
            ('pack', urwid.Divider(u'\u2550')),
            self.listbox
        ])

        gp.auth_state_changed += self.update

        self.update() 

def build(self):
        header = urwid.Pile([
                urwid.AttrMap(urwid.Text("Create Equipment"), "formhead"),
                urwid.AttrMap(urwid.Text("Arrow keys navigate, Enter to select form button. Type into other fields."), "formhead"),
                urwid.Divider(),
                ])
        formstack = []
        for groupname, group in [
                (None, ("model", "name", "serno")),
                ("Localization", ("language",)),
                ("Asset management", ("owner", "location", "sublocation", "vendor")),
                ("Automation", ("account",)),
                ("structural relationship", ('parent',)),
                ("Addtional Info", ("comments",)),
                ]:
            if groupname:
                formstack.append(self.build_divider(groupname))
            for colname in group:
                colmd = self.metadata[colname]
                wid = self.build_input(colmd)
                formstack.append(wid)
        data = self.get_default_data(["active", "addeddate"])
        formstack.append(self.get_form_buttons(data, create=True))
        listbox = urwid.ListBox(urwid.SimpleListWalker(formstack))
        return urwid.Frame(urwid.AttrMap(listbox, 'body'), header=header) 

def build(self):
        header = urwid.Pile([
                urwid.AttrMap(urwid.Text("Edit Test Case"), "formhead"),
                urwid.AttrMap(urwid.Text("Arrow keys navigate, Enter to select form button. Type into other fields."), "formhead"),
                urwid.Divider(),
                ])
        formstack = []
        for groupname, group in [
                (None, ("name", "purpose", "passcriteria")),
                ("Details", ("startcondition", "endcondition", "procedure", "prerequisites")),
                ("Management", ("valid", "automated", "interactive", "functionalarea", "testimplementation", "time_estimate", "bugid")),
                ("Requirement", ("reference", "cycle", "priority")),
                ("Status", ("status",)),
                ("Comments", ("comments",)),
                ]:
            if groupname:
                formstack.append(self.build_divider(groupname))
            for colname in group:
                colmd = self.metadata[colname]
                wid = self.build_input(colmd, getattr(self.row, colmd.colname))
                formstack.append(wid)
        data = self.get_default_data(["lastchange"])
        formstack.append(self.get_form_buttons(data))
        listbox = urwid.ListBox(urwid.SimpleListWalker(formstack))
        return urwid.Frame(urwid.AttrMap(listbox, 'body'), header=header) 

def populate_table(self):
        app = self.parent

        table_rows = []
        for hostname in sorted(app.hosts.keys()):
            # establish column field defaults
            if app.hosts[hostname]._facts:
                this_host = app.hosts[hostname]
                w = urwid.AttrMap(TableRow(this_host.info(), app),
                                  'body',
                                  'reverse')
                table_rows.append(w)

        self.table_body = urwid.SimpleListWalker(table_rows)

        return 

def build(self):
        menulist = []
        # big title
        bt = urwid.BigText("Storage Editor", urwid.HalfBlock5x4Font())
        bt = urwid.Padding(bt, "center", None)
        # primary tables for editing
        self.primlist = [TableItemWidget(s) for s in self._PRIMARY_TABLES]
        for b in self.primlist:
            urwid.connect_signal(b, 'activate', self._select)
        pmenu = urwid.GridFlow(self.primlist, 20, 2, 1, "left")
        # heading blurbs
        subhead = urwid.AttrMap(urwid.Text("Select an object type to view or edit."), "subhead")
        supportsubhead = urwid.AttrMap(urwid.Text("Select a supporting object to view or edit."), "subhead")
        # secondary/support tables
        self.seclist = [TableItemWidget(s) for s in self._SUPPORT_TABLES]
        for b in self.seclist:
            urwid.connect_signal(b, 'activate', self._select)
        smenu = urwid.GridFlow(self.seclist, 25, 1, 0, "left")
        divider = urwid.Divider("-", top=1, bottom=1)
        menulist = [bt, divider, subhead, pmenu, divider, supportsubhead, smenu]
        listbox = urwid.ListBox(urwid.SimpleListWalker(menulist))
        return urwid.Frame(listbox) 

def __init__(self, optimizer):
        self.optimizer = optimizer
        self.guidanceOptions = copy.deepcopy(optimizer.humanGuidedATPEOptimizer.guidanceOptions)

        self.parameterLockedValueEdits = {}
        self.parameterMinEdits = {}
        self.parameterMaxEdits = {}
        self.statusLabels = {}

        self.listWalker = urwid.SimpleListWalker(self.generateGrid())
        listbox = urwid.ListBox(self.listWalker)

        close_button = urwid.Button("Close")
        urwid.connect_signal(close_button, 'click',lambda button: self.close())

        buttons = urwid.Filler(urwid.Columns([close_button]))

        super(HumanGuidancePopup, self).__init__(makeMountedFrame(urwid.Pile([(5, buttons), listbox]), 'Apply Human Guidance'))

        self.optimizer = optimizer 

def make_failed_view(self):
        blank = urwid.Divider()
        status_header = urwid.AttrWrap(urwid.Text('Run Code Status: '), 'body')
        status = urwid.AttrWrap(urwid.Text('Wrong Answer'), 'hometag')
        columns = urwid.Columns([(17, status_header), (20, status)])
        result_header = urwid.Text('--- Run Code Result: ---', align='center')
        passed_header = urwid.Text('Passed test cases:')
        s = self.result['compare_result']
        passed = urwid.Text('%d/%d' % (s.count('1'), len(s)))
        your_input_header = urwid.Text('Your input:')
        your_input = urwid.Text(self.result['input'])
        your_answer_header = urwid.Text('Your answer:')
        your_answer = urwid.Text(self.result['code_output'])
        expected_answer_header = urwid.Text('Expected answer:')
        expected_answer = urwid.Text(self.result['expected_output'])
        list_items = [
            result_header,
            blank, columns,
            blank, passed_header, passed,
            blank, your_input_header, your_input,
            blank, your_answer_header, your_answer,
            blank, expected_answer_header, expected_answer
        ]
        self._append_stdout_if_non_empty(list_items)
        return urwid.Padding(urwid.ListBox(urwid.SimpleListWalker(list_items)), left=2, right=2) 

def build(self):
        showeq = urwid.Text(self._testequipment.equipment.name)
        maxlen = 0
        uutcb = urwid.CheckBox("DUT/UUT", state=self._testequipment.UUT)
        urwid.connect_signal(uutcb, 'change', self._uut_select)
        blist = [AM(uutcb, "important")]
        for role in self._roles:
            label = str(role)
            maxlen = max(len(label), maxlen)
            state = role in self._testequipment.roles
            but = urwid.CheckBox(str(role), state=state)
            urwid.connect_signal(but, 'change', self._multi_select, role)
            blist.append(but)
        roleboxes = urwid.Padding(urwid.GridFlow(blist, maxlen+4, 1, 0, "left"))
    #    # buttons
        ok, cancel = self.get_form_buttons()
        buts = urwid.Columns([(10, ok), (10, cancel)], dividechars=1, focus_column=0)
        div = urwid.Divider()
        return urwid.ListBox(urwid.SimpleListWalker([AM(showeq, "flagged"), div, roleboxes, div, buts])) 

def build(self):
        self._showeq = urwid.Text("")
        eqi = self._create_equipment_input()
        maxlen = 0
        uutcb = urwid.CheckBox("DUT/UUT", state=False)
        urwid.connect_signal(uutcb, 'change', self._uut_select)
        blist = [AM(uutcb, "important")]
        for role in self._roles:
            label = str(role)
            maxlen = max(len(label), maxlen)
            but = urwid.CheckBox(str(role), state=False)
            urwid.connect_signal(but, 'change', self._multi_select, role)
            blist.append(but)
        roleboxes = urwid.Padding(urwid.GridFlow(blist, maxlen+4, 1, 0, "left"))
        # buttons
        ok, cancel = self.get_form_buttons()
        buts = urwid.Columns([(10, ok), (10, cancel)], dividechars=1, focus_column=0)
        return urwid.ListBox(urwid.SimpleListWalker([eqi, AM(self._showeq, "flagged"), roleboxes, buts])) 

def _create_relation_input(self):
        choices = dict(models.get_choices(self.session, self.modelclass, self.metadata.colname, None))
        addnew = urwid.Button("Add New")
        urwid.connect_signal(addnew, 'click', self._add_new_related)
        # Cancel
        canc = urwid.Button("Cancel")
        urwid.connect_signal(canc, 'click', self._cancel)
        butcol = urwid.Columns([AM(addnew, "buttn", "buttnf"), AM(canc, "buttn", "buttnf")])
        wlist = [butcol]
        if self.metadata.nullable:
            entry = ListEntry(urwid.Text("None (remove)"))
            urwid.connect_signal(entry, 'activate', self._single_select)
            wlist.append(entry)
        for pk, cname in choices.items():
            entry = ListEntry(urwid.Text(cname))
            urwid.connect_signal(entry, 'activate', self._single_select, pk)
            wlist.append(entry)
        listbox = urwid.ListBox(urwid.SimpleListWalker(wlist))
        return urwid.BoxAdapter(urwid.LineBox(listbox), 9) 

def make_compile_error_view(self):
        blank = urwid.Divider()
        status_header = urwid.AttrWrap(urwid.Text('Run Code Status: '), 'body')
        status = urwid.AttrWrap(urwid.Text('Compile Error'), 'hometag')
        columns = urwid.Columns([(17, status_header), (20, status)])
        column_wrap = urwid.WidgetWrap(columns)
        result_header = urwid.Text('--- Run Code Result: ---', align='center')
        your_input_header = urwid.Text('Your input:')
        your_input = urwid.Text('')
        your_answer_header = urwid.Text('Your answer:')
        your_answer = urwid.Text(self.result['compile_error'])
        expected_answer_header = urwid.Text('Expected answer:')
        expected_answer = urwid.Text('Unkown Error')
        list_items = [
            result_header,
            blank, column_wrap,
            blank, your_input_header, your_input,
            blank, your_answer_header, your_answer,
            blank, expected_answer_header, expected_answer
        ]
        self._append_stdout_if_non_empty(list_items)
        return urwid.Padding(urwid.ListBox(urwid.SimpleListWalker(list_items)), left=2, right=2) 

def make_runtime_error_view(self):
        blank = urwid.Divider()
        status_header = urwid.AttrWrap(urwid.Text('Run Code Status: '), 'body')
        status = urwid.AttrWrap(urwid.Text('Runtime Error'), 'hometag')
        columns = urwid.Columns([(17, status_header), (20, status)])
        column_wrap = urwid.WidgetWrap(columns)
        result_header = urwid.Text('--- Run Code Result: ---', align='center')
        error_header = urwid.Text('Runtime Error Message:')
        error_message = urwid.Text(self.result['runtime_error'])
        your_input_header = urwid.Text('Last input:')
        your_input = urwid.Text(self.result['last_testcase'])
        list_items = [
            result_header,
            blank, column_wrap,
            blank, error_header, error_message,
            blank, your_input_header, your_input,
        ]
        self._append_stdout_if_non_empty(list_items)
        return urwid.Padding(urwid.ListBox(urwid.SimpleListWalker(list_items)), left=2, right=2) 

def build(self):
        environments = db.get_environment_names()
        reports = [None] + db.get_report_names()

        self._envsel = widgets.ListScrollSelector(environments)
        self._repsel = widgets.ListScrollSelector(reports)
        self._tclist = urwid.SimpleListWalker([])
        butcols = urwid.Columns([
                ("pack", urwid.Text("environment:")),
                AM(self._envsel, "selectable", "butfocus"),
                ("pack", urwid.Text("report:")),
                AM(self._repsel, "selectable", "butfocus"),
            ], dividechars=2)
        header = urwid.Pile([
        AM(urwid.Text("Select environment, report, and set options. Use Tab to switch to environment selector. Selected:"), "subhead"),
                urwid.BoxAdapter(urwid.ListBox(self._tclist), 2),
                butcols,
        ])
        body = self._build_test_selector(False)
        return urwid.Frame(body, header=header, focus_part="body") 

def make_unified_error_view(self, error_title):
        blank = urwid.Divider()
        status_header = urwid.AttrWrap(urwid.Text('Run Code Status: '), 'body')
        status = urwid.AttrWrap(urwid.Text(error_title), 'hometag')
        columns = urwid.Columns([(17, status_header), (30, status)])
        column_wrap = urwid.WidgetWrap(columns)
        if 'last_testcase' in self.result:
            result_header = urwid.Text('--- Run Code Result: ---', align='center')
            your_input_header = urwid.Text('Last executed input:')
            your_input = urwid.Text(self.result['last_testcase'])
            list_items = [
                result_header,
                blank, column_wrap,
                blank, your_input_header, your_input,
            ]
        else:
            list_items = [
                result_header,
                blank, column_wrap,
            ]
        self._append_stdout_if_non_empty(list_items)
        return urwid.Padding(urwid.ListBox(urwid.SimpleListWalker(list_items)), left=2, right=2) 

def setup_widgets(self):
        self.intro_frame = urwid.LineBox(
            urwid.Filler(
                urwid.Text(('body_text', self.INTRO_MESSAGE.format("")), align=urwid.CENTER),
                valign=urwid.MIDDLE,
            )
        )

        self.frame = urwid.Frame(
            body=self.intro_frame,
            footer=urwid.Text(
                [self.FOOTER_START, ('heartbeat_inactive', self.HEARTBEAT_ICON)],
                align=urwid.CENTER
            )
        )

        self.loop = urwid.MainLoop(
            urwid.AttrMap(self.frame, 'body_text'),
            unhandled_input=show_or_exit,
            palette=PALETTE,
        )

        self.list_walker = urwid.SimpleListWalker(self.message_list)
        self.list_box = urwid.ListBox(self.list_walker)
        urwid.connect_signal(self.list_walker, "modified", self.item_focused) 

def __init__(self, parent):
        self.text = (
            "Deploy\n\nThe deployment phase will start the installer "
            "to configure the required hosts."
        )

        self.deploy_attempted = False
        self.success = 0
        self.skipped = 0
        self.failed = 0
        self.unreachable = 0
        self.task_info_w = urwid.Text("Waiting to start")
        self.success_w = urwid.Text(str(self.success),
                                    align='center')
        self.skipped_w = urwid.Text(str(self.skipped),
                                    align='center')
        self.failed_w = urwid.Text(str(self.failed),
                                   align='center')
        self.unreachable_w = urwid.Text(str(self.unreachable),
                                        align='center')

        self.button_row = button_row([('Skip', self.skip_deploy),
                                      ('Deploy', self.deploy)])
        self.failed_hosts = []
        self.failure_list_w = urwid.SimpleListWalker([])
        self.failure_walker_w = urwid.ListBox(self.failure_list_w)

        self.failure_title_w = urwid.Text("")

        UIBaseClass.__init__(self, parent) 

def page_update(self, stats):
        app = self.parent

        task_states = stats['task_state']

        for key in task_states:
            self.__setattr__(key, task_states[key])

        self.success_w.set_text(str(self.success))
        self.failed_w.set_text(str(self.failed))
        self.unreachable_w.set_text(str(self.unreachable))
        self.skipped_w.set_text(str(self.skipped))
        self.task_info_w.set_text(stats['task_name'])

        self.failed_hosts = stats['failures'].keys()
        if self.failed_hosts:

            if self.failure_title_w.get_text()[0] == '':

                self.failure_title_w.set_text("Failure Details")

            error_rows = []
            for host in self.failed_hosts:
                # FIXME should add to the table, not recreate each time!
                host_errors = [self._get_err(e_dict)
                               for e_dict in stats['failures'][host]]
                host_errors.insert(0, "{}\n".format(stats['task_name']))
                host_text = ','.join(host_errors)
                error_rows.append(DataRow(host, host_text))

            self.failure_list_w = urwid.SimpleListWalker(error_rows)

            app.refresh_ui()
            app.loop.widget = app.top

        app.loop.draw_screen() 

def __init__(self, app):
        self.app = app

        self.walker = urwid.SimpleListWalker([
            urwid.Text('Not ready')
        ])
        self.notification = None

        gp.auth_state_changed += self.auth_state_changed

        super(MyPlaylistListBox, self).__init__(self.walker) 

def setup_menu_view(self):
        hdr = urwid.Pile([self.header,
                          (10, urwid.AttrWrap(urwid.ListBox(self.logger_box), 'body')),
                          urwid.AttrWrap(self._state_overview, 'note'),
                          ])
        self.menu_box = urwid.ListBox(urwid.SimpleListWalker([]))
        self.menu_view = urwid.Frame(header=hdr, body=self.menu_box) 

def __init__(self, chat_widget):
        self.chat_widget = chat_widget
        self.list_walker = urwid.SimpleListWalker([])
        self.w_listbox = urwid.ListBox(self.list_walker)
        self.update_list()
        self.__super.__init__(urwid.Padding(self.w_listbox, left=2))
        keymaps.GLOBAL.add_command("redraw", self.update_list)

        def updlst(*args, **kwargs):
            self.update_list()
        self.chat_widget.discord.add_event_handler("on_member_join", updlst)
        self.chat_widget.discord.add_event_handler("on_member_remove", updlst)
        self.chat_widget.discord.add_event_handler("on_member_update", updlst) 

def __init__(self, app):
        self.app = app

        self.walker = urwid.SimpleListWalker([
            urwid.Text('Not ready')
        ])
        self.notification = None

        gp.auth_state_changed += self.auth_state_changed

        super(MyStationListBox, self).__init__(self.walker) 

def __init__(self, srvapi, keymap, columns=None, sort=None, title=None):
        self._srvapi = srvapi
        self._keymap = keymap

        if self.focusable_items:
            self._ListItemClass = keymap.wrap(self.ListItemClass, context=self.keymap_context)
        else:
            self._ListItemClass = self.ListItemClass

        self._data_dict = None
        self._marked = set()

        self._existing_widgets = set()
        self._hidden_widgets = set()

        self._sort = sort
        self._sort_orig = sort

        self._title_name = title
        self.title_updater = None

        self._table = Table(**self.tuicolumns)
        self._table.columns = columns or ()

        if self.focusable_items:
            walker = urwid.SimpleFocusListWalker([])
        else:
            walker = urwid.SimpleListWalker([])
        self._listbox = keymap.wrap(urwid.ListBox, context=self.keymap_context + 'list')(walker)

        listbox_sb = urwid.AttrMap(
            ScrollBar(urwid.AttrMap(self._listbox, self.palette_name)),
            self.palette_name + '.scrollbar'
        )
        pile = urwid.Pile([
            ('pack', urwid.AttrMap(self._table.headers, self.palette_name + '.header')),
            listbox_sb
        ])
        super().__init__(pile) 

def __init__(self):
        self.walker = urwid.SimpleListWalker([])
        super(ArtistListBox, self).__init__(self.walker)