CRdcyManager::~CRdcyManager(void)
{
	m_thrd_alive = FALSE; /* to terminate threads */

	Sleep(1000); /* Let the thread to finish */

	if (m_socket != INVALID_SOCKET)
	{
		closesocket(m_socket);
		m_socket = INVALID_SOCKET;
	}

	if (m_hMutex)
	{
		CloseHandle(m_hMutex);
		m_hMutex = NULL;
	}
}

    for (std::map<std::string, std::list<std::string>>::iterator begin = map.begin(); begin != map.end(); ++begin)
    {
    	std::cout << begin->first << ": ";
	    for (std::list<std::string>::const_iterator name = begin->second.begin(); name != begin->second.end(); ++name)
		    std::cout << name << ' ';
    	std::cout << '\n';
    }

    	// Vs:

    for (const auto [code, names] : map)
    {
    	std::cout << code << ": ";
    	for (const auto &name : names)
    		std::cout << name << ' ';

    // Esto hago:

    CRdcyManager::~CRdcyManager(void)
    {
    	m_thrd_alive = FALSE; /* to terminate threads */

    	Sleep(1000); /* Let the thread to finish */

    	if (m_socket != INVALID_SOCKET)
    	{
    		closesocket(m_socket);
    		m_socket = INVALID_SOCKET;
    	}

    	if (m_hMutex)
    	{
    		CloseHandle(m_hMutex);
    		m_hMutex = NULL;
    	}
    }

    // Esto necesito:

    CRdcyManager::~CRdcyManager(void)
    {
    	m_thrd_alive = FALSE; /* to terminate threads */

    	Sleep(1000); /* Let the thread to finish */

void loop() {
  int fila;
  int col;
  int status = HIGH;

  //
  //  Los botones estan HIGH hasta que son presionados;
  //  entonces quedan en LOW.
  //
  for (col = 0; col < pines && status == HIGH; col++) {
    digitalWrite(pin_out + col, LOW);
    for (fila = 0; fila < pines && status == HIGH; fila++) {
      status = digitalRead(pin_in + fila);
    }
    digitalWrite(pin_out + col, HIGH);
  }

  if (status == LOW && (millis() - last_key_down) > 100) {
    fila--;
    col--;
    //  Se presionó el botón en (fila, columna)

class Button:
    objetivo = 0b11000000
    corte = 0b011111111

    def __init__(self, pin, callback):
        self.pin = pin
        self.pin_in = machine.Pin(pin, machine.Pin.IN)
        self.callback = callback
        uasyncio.create_task(self.polling(5))

    async def polling(self, interval_ms):

        while True:
            state = 0

            while state != Button.objetivo:
                await uasyncio.sleep_ms(interval_ms)
                btn = 0 if self.pin_in.value() else 1
                state = (state << 1 & Button.corte) | btn

a = 1
print(a)
a = "hola"
print(a)
a = [1,2,3]
print(a)

1
hola
[1, 2, 3]

Process finished with exit code 0

a = 1
print(a + 2)
a = "hola"
print(a + ", chao")
a = [1,2,3]
print(a + [5, 6])

3
hola, chao
[1, 2, 3, 5, 6]

Process finished with exit code 0