I thing i found a bug

[ixelizm]

from flet import *
import threading
import time
from requests import get


class BCALDeprem(UserControl):
    def __init__(self, seconds, page):
        super().__init__()
        self.seconds = seconds
        self.temp = seconds
        self.column = Column(
            expand=True,
            spacing=5
        )
        self.page = page
        self.depremappbar = AppBar(
            toolbar_height=50,
            title=Stack(
                controls=[
                    Icon(icons.ADD_HOME, size=50),
                    Text("Büyükçekmece Deprem Yardım", left=55,
                        top=12, weight=FontWeight.W_700),
                    Container(
                        content=Row(
                            controls=[
                                Icon(icons.AV_TIMER, size = 20),
                                Text("", size = 16)
                            ],
                            spacing=3),
                        left=385, top=18
                    )
                ], width=750),
            center_title=False,
            color="#EF7F1A",
            bgcolor="#2B2A29"
        )
        self.otherappbar = AppBar(
            toolbar_height=50,
            title=Stack(
                controls=[
                    Icon(icons.ADD_HOME, size=50),
                    Text("Büyükçekmece Deprem Yardım", left=55,
                        top=12, weight=FontWeight.W_700)
                ], width=750),
            center_title=False,
            color="#EF7F1A",
            bgcolor="#2B2A29"
        )
        self.page.appbar = self.depremappbar
        self.page.navigation_bar = NavigationBar(
            destinations=[
                NavigationDestination(
                    icon=icons.LAST_PAGE_OUTLINED, selected_icon=icons.LAST_PAGE, label="Son Depremler"),
                NavigationDestination(icon=icons.EMERGENCY_SHARE_OUTLINED,
                                    selected_icon=icons.EMERGENCY_SHARE, label="İletişim"),
                NavigationDestination(
                    icon=icons.SECURITY,
                    selected_icon=icons.BOOKMARK,
                    label="İhbarlar",
                ),
            ], on_change=lambda e: self.change_index(e))

        self.get_request()
        self.page.controls.append(self.column)
        self.page.update()

    def change_index(self, event):
        selected_index = event.control.selected_index
        if selected_index == 0:
            self.seconds = self.temp
            self.page.appbar = self.depremappbar
            self.running = True
            self.page.controls = []
            self.page.update()

            self.page.controls.append(self.column)
            self.page.update()
        if selected_index == 1:
            self.running = False
            self.page.appbar = self.otherappbar
            self.page.controls = []
            self.page.update()
            print(self.page.controls)

    def did_mount(self):
        self.running = True
        self.th = threading.Thread(
            target=self.update_timer, args=(), daemon=True)
        self.th.start()

    def will_unmount(self):
        self.running = False

    def get_request(self):
        print("Request making.....")
        self.tempcont = self.column.controls
        self.column.controls = []
        self.page.update()
        try:
            url = "İPADDRESS" #Return a list like {"Success":true,"count":25,"results":[["2023.03.02","21:58:20","37.5263","37.3348","5.1","-.-","1.7","-.-","SAHINTEPE-PAZARCIK","(KAHRAMANMARAS)"],["2023.03.02","21:55:28","37.2010","36.9278","5.2","-.-","1.7","-.-","SAKCAGOZE-NURDAGI","(GAZIANTEP)"],["2023.03.02","21:53:01","38.0293","36.2982","4.9","-.-","1.4","-.-","KAZANDERE-GOKSUN","(KAHRAMANMARAS)"],["2023.03.02","21:50:32","39.2345","41.0828","5.0","-.-","2.6","-.-","SERPMEKAYA-KARLIOVA","(BINGOL)"],["2023.03.02","21:48:56","36.3940","36.5352","8.6","-.-","1.4","-.-","KIRCAOGLU-KUMLU","(HATAY)"],["2023.03.02","21:47:05","36.6012","36.3785","9.1","-.-","1.8","-.-","ALIBEYCAGILI-KIRIKHAN","(HATAY)"],["2023.03.02","21:46:00","38.2283","38.7023","2.1","-.-","2.2","-.-","KOKPINAR-PUTURGE","(MALATYA)"],["2023.03.02","21:41:53","36.2450","36.1400","20.7","-.-","1.4","-.-","EKINCI-(HATAY)"],["2023.03.02","21:32:22","38.1785","36.6392","16.1","-.-","1.6","-.-","ESENKOY-GOKSUN","(KAHRAMANMARAS)"],["2023.03.02","21:31:22","38.1683","37.8480","6.7","-.-","1.9","-.-","POLAT-DOGANSEHIR","(MALATYA)"],["2023.03.02","21:12:56","38.4128","37.2688","5.0","-.-","1.4","-.-","GOKCEK-ELBISTAN","(KAHRAMANMARAS)"],["2023.03.02","21:09:25","37.8823","36.3888","9.1","-.-","2.3","-.-","BUYUKCAMURLU-GOKSUN","(KAHRAMANMARAS)"],["2023.03.02","21:05:38","38.0847","37.8457","9.5","-.-","1.5","-.-","TOPRAKTEPE-DOGANSEHIR","(MALATYA)"],["2023.03.02","20:58:59","36.0148","36.0397","27.8","-.-","1.6","-.-","YESILTEPE-YAYLADAGI","(HATAY)"],["2023.03.02","20:57:54","36.0280","35.7953","6.1","-.-","1.7","-.-","AKDENIZ"],["2023.03.02","20:56:21","36.2503","35.9262","9.2","-.-","2.1","-.-","BUYUKOBA-SAMANDAG","(HATAY)"],["2023.03.02","20:51:20","36.1300","27.8933","73.2","-.-","2.3","-.-","RODOS","ADASI","(AKDENIZ)"],["2023.03.02","20:46:28","38.6043","39.5347","15.2","-.-","1.4","-.-","DEGIRMENONU-(ELAZIG)"],["2023.03.02","20:45:12","37.3990","36.5172","4.1","-.-","1.5","-.-","KALEKAYA-(KAHRAMANMARAS)"],["2023.03.02","20:44:40","37.3597","36.8517","6.0","-.-","1.4","-.-","TURKOGLU","(KAHRAMANMARAS)"],["2023.03.02","20:42:46","38.3317","37.0972","8.3","-.-","1.5","-.-","KISLAKOY-ELBISTAN","(KAHRAMANMARAS)"],["2023.03.02","20:40:21","38.0437","37.5593","5.0","-.-","2.6","-.-","TATLAR-NURHAK","(KAHRAMANMARAS)"],["2023.03.02","20:36:54","40.5025","29.3008","11.5","-.-","1.7","-.-","ORHANGAZI","(BURSA)"],["2023.03.02","20:36:02","38.0933","37.9422","13.9","-.-","2.0","-.-","COMLEKOBA-DOGANSEHIR","(MALATYA)"],["2023.03.02","20:27:31","37.3263","36.7913","8.5","-.-","1.5","-.-","AKCALI-TURKOGLU","(KAHRAMANMARAS)"]]}
            response = get(url).json()
            for quake in response["results"]:
                self.column.controls.append(ListTile(

                    leading=Card(
                        content=Row(
                            controls=[
                                Container(
                                    bgcolor="purple",
                                    content=Text(
                                        f"{quake[6]}", size=25, weight=FontWeight.W_700, text_align=TextAlign.CENTER),
                                    border_radius=12,
                                    margin=5,
                                    height=40,
                                    width=42
                                ),
                                Column(
                                    controls=[
                                        Text(
                                            value=f"{quake[-2] + ' ' + quake[-1] if '.' not in quake[-2] else quake[-1]}", weight=FontWeight.W_800, size=15),
                                        Text(
                                            value=f"{'Şiddeti: ' + quake[-3] if '-.-' not in quake[-3] else 'Şiddeti: ' + quake[-4]} Boylam: {quake[3]} Enlem: {quake[2]}")

                                    ],
                                    spacing=5
                                )
                            ]
                        ), height=60),
                ))
        except Exception as e:
            self.column.controls = self.tempcont
            print("Temp Çağrıldı", e)
        self.page.update()

    def update_timer(self):
        while True:
            while self.running:
                mins, secs = divmod(self.seconds, 60)
                self.page.appbar.title.controls[-1].content.controls[-1].value = "{:02d}:{:02d}".format(
                    mins, secs)
                self.page.appbar.update()
                time.sleep(1)
                self.seconds -= 1
                if self.seconds < 0:
                    self.get_request(
                    )
                    self.page.update()
                    self.seconds = self.temp

    def build(self):
        return self.column


def main(page: Page):
    page.theme_mode = "dark"

    page.scroll = "hidden"
    page.add(
        BCALDeprem(5, page)
    )


app(target=main)

This application, which shows the last 25 earthquakes in turkey, works initially, but the controls on the page are not deleted when switching from the Son depremler page to the İletişim page. Could it be a bug or is it my fault?

page controls are blank but cards are still on the screen, I tried page.clean it worked but why did it work and why page.controls didn't work

[FeodorFitsner]

I've converted the issue to discussion. Please try being more specific with a title of the issue/discussion.