[Question] flet 0.28.3 on windows 11

[Brazi87]

Question

Hi,
I have installed flet 0.28.3 and python 3.12, 3.13, 3.14 .. when I run the code, it's closed immediately ..
how to fix it please ?

the same code runs correctly on flet 0.27.6

Code sample

import flet as ft

def main(page: ft.Page):
    page.add(ft.Text("Hello from Flet!"))
    page.update()
    

ft.app(main)

Error message

No response

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• I have searched for answers to my question both in the issues and in previous discussions.

[SheharaVinod]

i don't know what's happening.

but you can try this code.

import flet as ft
import logging

logging.basicConfig(level=logging.DEBUG)
logger = logging.getLogger(__name__)

def main(page: ft.Page):
    logger.info("Flet app is starting...")
    page.add(ft.Text("Hello from Flet!"))
    logger.info("add Text component to the page")
    page.update()
    logger.info("update the page")

logger.info("call flet.app()")
ft.app(main)

open terminal and execute python <script-name.py> -v
-v for verbose information.

if it's still print nothing on console , meybe your python is not installed properly. IDK ,
if it's printing logger information but close the window , it means it's probubly a bug in flet.

try and tell us what happen..

[Brazi87]

Hi, thank you for responding me
here is what I got :

INFO:main:call flet.app()
DEBUG:asyncio:Using proactor: IocpProactor
INFO:flet:Assets path configured: C:\Users\Administrator\Desktop\pythonWorld\assets
DEBUG:flet:Creating new PubSubHub instance
DEBUG:flet:Creating new PubSubHub instance
INFO:flet:Starting up TCP server on localhost:52572
INFO:flet:Flet app has started...
INFO:flet:App URL: tcp://localhost:52572
INFO:flet_desktop:Starting Flet View app...
INFO:flet_desktop:Looking for Flet executable at: C:\Users\Administrator\Desktop\pythonWorld.venv\Lib\site-packages\flet_desktop\app\flet\flet.exe
INFO:flet_desktop:Flet View found in: C:\Users\Administrator\Desktop\pythonWorld.venv\Lib\site-packages\flet_desktop\app\flet\flet.exe
DEBUG:flet:Connected new TCP client
DEBUG:flet:_on_message: {"action":"registerWebClient","payload":{"pageName":"","pageRoute":"/","pageWidth":"1264.0","pageHeight":"681.0","windowWidth":"1280.0","windowHeight":"720.0","windowTop":"10.0","windowLeft":"10.0","isPWA":"false","isWeb":"false","isDebug":"false","platform":"windows","platformBrightness":"dark","media":"{"padding":{"top":0.0,"right":0.0,"bottom":0.0,"left":0.0},"view_padding":{"top":0.0,"right":0.0,"bottom":0.0,"left":0.0},"view_insets":{"top":0.0,"right":0.0,"bottom":0.0,"left":0.0}}","sessionId":""}}
DEBUG:flet:__send: {"action":"registerWebClient","payload":{"session":{"id":"","controls":{"page":{"i":"page","t":"page","p":"","c":[],"route":"/","width":"1264.0","height":"681.0","windowwidth":"1280.0","windowheight":"720.0","windowtop":"10.0","windowleft":"10.0","pwa":"false","web":"false","debug":"false","platform":"windows","platformBrightness":"dark","media":"{"padding":{"top":0.0,"right":0.0,"bottom":0.0,"left":0.0},"view_padding":{"top":0.0,"right":0.0,"bottom":0.0,"left":0.0},"view_insets":{"top":0.0,"right":0.0,"bottom":0.0,"left":0.0}}"}}},"error":"","appInactive":false}}
DEBUG:flet:_process_command: get ['page', 'route'] {}
DEBUG:flet:_process_command: get ['page', 'pwa'] {}
DEBUG:flet:_process_command: get ['page', 'web'] {}
DEBUG:flet:_process_command: get ['page', 'debug'] {}
DEBUG:flet:_process_command: get ['page', 'platform'] {}
DEBUG:flet:_process_command: get ['page', 'platformBrightness'] {}
DEBUG:flet:_process_command: get ['page', 'media'] {}
DEBUG:flet:_process_command: get ['page', 'width'] {}
DEBUG:flet:_process_command: get ['page', 'height'] {}
DEBUG:flet:_process_command: get ['page', 'windowWidth'] {}
DEBUG:flet:_process_command: get ['page', 'windowHeight'] {}
DEBUG:flet:_process_command: get ['page', 'windowTop'] {}
DEBUG:flet:_process_command: get ['page', 'windowLeft'] {}
DEBUG:flet:_process_command: get ['page', 'clientIP'] {}
DEBUG:flet:_process_command: get ['page', 'clientUserAgent'] {}
INFO:flet:App session started
INFO:main:Flet app is starting...
DEBUG:flet:sent to TCP: 604
DEBUG:flet:_process_command: add [] {'to': 'page', 'at': '0'}
DEBUG:flet:_process_command: add [] {'to': 'page', 'at': '1'}
DEBUG:flet:__send: {"action":"pageControlsBatch","payload":[{"action":"addPageControls","payload":{"controls":[{"t":"view","i":"_1","p":"page","c":["_2"],"at":"0"},{"t":"text","i":"_2","p":"_1","c":[],"value":"Hello from Flet!"}],"trimIDs":[]}},{"action":"addPageControls","payload":{"controls":[{"t":"offstage","i":"_3","p":"page","c":[],"at":"1"}],"trimIDs":[]}}]}
DEBUG:flet:sent to TCP: 351
INFO:main:add Text component to the page
INFO:main:update the page
DEBUG:flet_desktop:Flet View process 12820
DEBUG:flet:Closing connection...
DEBUG:flet:Disconnecting all pages...
DEBUG:flet:page.on_event_async: page disconnect
DEBUG:flet:Shutting down thread pool...

[SheharaVinod]

I think it's a bug; I have no idea what's happening.

INFO:main:add Text component to the page
INFO:main:update the page
DEBUG:flet_desktop:Flet View process 12820
DEBUG:flet:Closing connection... Y
DEBUG:flet:Disconnecting all pages...
DEBUG:flet:page.on_event_async: page disconnect
DEBUG:flet:Shutting down thread pool...

I'm sorry; I don't know what the root cause of the problem is. It's good to open an issue with logs.

[Brazi87]

it is fixed in flet 0.70.0.dev5520.
thank you for your help