Python & Arduino - Arduino does not restore my serial write() function

Question

I am trying to communicate a python code and Arduin, but it is not returning the value to light the LED.

Already all configured, Pip, pyserial etc.

import serial
import time
import os
conexao = serial.Serial('COM3', 9600)

def menu():
    os.system('cls') or None

     print("""
       CONTROLE DO LED
        1- ON
        2- OFF    

          """)
   op = int(input("OPTION: "))

   if op == 1:
      try:
           conexao.write(1)
           print("LED LIGADO")
           time.sleep(1)
           print("RETORNANDO AO MENU")
           time.sleep(1)
           return menu()

      except:
           print("HOUVE ALGUM ERRO")
           print("RETORNANOD AO MENU")
           time.sleep(2)
           return menu()


   if op == 2:
       try:    
           conexao.write(2)
           print("LED DESLIGADO")
           time.sleep(1)
           print("RETORNANDO AO MENU")
           return menu()

       except: 
           print("HOUVE ALGUM ERRO")
           print("RETORNANOD AO MENU")
           time.sleep(2)
           return menu()

 menu()