pyttsx3 with flet

[ingdesarr1]

Question

Good morning. I'm trying to use flet with the library pyttsx3, to play sound with my apps, but don't work well. When I play the sound the first time, sounds good, but if I try to play again, appears the error below, and don't work anymore. I try stop the loop, but don't work. I appreciate the help in this situation.

Thanks

Code sample

import flet as ft
import pyttsx3

engine = pyttsx3.init()

def main(page:ft.Page):
    page.title = "Test Dropdown"

    def cambio(e):
        engine.say(f"Probando. {e.control.hint_text} {e.control.value}")
        engine.runAndWait()
        print(e.control.hint_text)
        engine.stop()
        # # e.control.data += 1
        # engine.endLoop()

    contenedor = ft.Container(
        content=ft.Column(
            controls=[
                ft.Dropdown(
                    options=[
                        ft.dropdown.Option("Valor 1"),
                        ft.dropdown.Option("Valor 2"),
                        ft.dropdown.Option("Valor 3"),
                        ft.dropdown.Option("Valor 4"),
                    ],
                    hint_text="Selector de opciones 1",
                    width=500,
                    on_change=cambio
                ),
                ft.Dropdown(
                    options=[
                        ft.dropdown.Option("Valor 1"),
                        ft.dropdown.Option("Valor 2"),
                        ft.dropdown.Option("Valor 3"),
                        ft.dropdown.Option("Valor 4"),
                    ],
                    hint_text="Selector de opciones 2",
                    width=500,
                    on_change=cambio
                ),
            ]
        )
    )

    page.add(contenedor)

    
ft.app(target=main, assets_dir="assets")

Error message

Future exception was never retrieved
future: <Future finished exception=RuntimeError('run loop already started')>
Traceback (most recent call last):
  File "C:\Users\Usuario\AppData\Local\Programs\Python\Python311\Lib\concurrent\futures\thread.py", line 58, in run
    result = self.fn(*self.args, **self.kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Informacion\Equipos\Actualizar\flet23\Lib\site-packages\flet\core\page.py", line 903, in wrapper
    handler(*args)
  File "C:\Informacion\Equipos\Actualizar\AMP40ST\otros\test_drop.py", line 11, in cambio
    engine.runAndWait()
  File "C:\Informacion\Equipos\Actualizar\flet23\Lib\site-packages\pyttsx3\engine.py", line 180, in runAndWait
    raise RuntimeError('run loop already started')
RuntimeError: run loop already started

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