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DJuego

opened on Jul 27, 2025

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Hi! I just want to let you know that due to limitations in Winpython regarding asyncio, and in particular nest_asyncio, it is not possible to run Flet code from the Spyder console.

Winpython with Spyder has been my go-to Python environment for quite some time, and this is the first serious limitation I have encountered.

I opened an issue on Flet regarding this matter here.

I was also wondering if there is a solution that would circumvent this problem.

Thanks for this project!

DJuego

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1. stonebig commented on Jul 27, 2025

   

   stonebig

   on Jul 27, 2025

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   It doesn't look like a WinPython change created the problem.
   It is more likely a Spyder internal change with Spyder-6.0.7 upgrade.

   Did you ask to:

   • an IA
   • Spyder community ?

   If you are lucky, it may just be a default parameter of Spyder that has changed.
2. stonebig commented on Jul 27, 2025

   

   stonebig

   on Jul 27, 2025

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   If my hypothesis is correct, the last WinPython without Spyder-6 should work as usual for you.
3. DJuego commented on Jul 27, 2025

   

   DJuego

   on Jul 27, 2025

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   First, thank you for responding so quickly, @stonebig .

   Okay. I'll ask the Spyder community. I attributed the problem to Winpython because when I try to use nest_asyncio to deal with the problem I have with flet, I get: NotImplementedError: asyncio.subprocess is not supported on this platform

   Example code:

   import flet as ft
   import asyncio
   import nest_asyncio
   
   nest_asyncio.apply()  # Parchea el bucle de eventos
   
   def main(page: ft.Page):
       page.title = "Flet counter example"
       page.vertical_alignment = ft.MainAxisAlignment.CENTER
   
       txt_number = ft.TextField(value="0", text_align=ft.TextAlign.RIGHT, width=100)
   
       def minus_click(e):
           txt_number.value = str(int(txt_number.value) - 1)
           page.update()
   
       def plus_click(e):
           txt_number.value = str(int(txt_number.value) + 1)
           page.update()
   
       page.add(
           ft.Row(
               [
                   ft.IconButton(ft.Icons.REMOVE, on_click=minus_click),
                   txt_number,
                   ft.IconButton(ft.Icons.ADD, on_click=plus_click),
               ],
               alignment=ft.alignment.center,
           )
       )
   asyncio.run(ft.app(main))

   I'll ask Spyder and see what they think. (I hope).

   Thank you again.

   DJuego

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