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pi@raspberrypi ~ $ python RaPiServer2.py
Traceback (most recent call last):
  File "RaPiServer2.py", line 129, in <module>
    pollster.register(Switch(light_bed_switch, light_bed), select.EPOLLIN | select.EPOLLET)
TypeError: argument must be an int, or have a fileno() method.

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class Switch(object):
    def __init__(self, switch, light):
        self.switch = switch
        self.light = light
        self.fileno = switch.fileno
        asyncore.socket_map[switch.fileno()] = self

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pi@raspberrypi ~ $ python RaPiServer2.py
Traceback (most recent call last):
  File "RaPiServer2.py", line 134, in <module>
    readwrite(fd, flags)
  File "RaPiServer2.py", line 117, in readwrite
    obj.handle_error()
AttributeError: 'int' object has no attribute 'handle_error'

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class EPoll(object):
    def __init__(self):
        self.epoll = select.epoll()
        self.fdmap = {}
        
    def register(self, obj, flags):
        fd = obj.fileno()
        self.epoll.register(fd, flags)
        self.fdmap[fd] = obj

    def unregister(self, obj):
        fd = obj.fileno()
        del self.fdmap[fd]
        self.epoll.unregister(fd)
        
    def poll(self):
        evt = self.epoll.poll()
        for fd, flags in evt:
            yield self.fdmap[fd], flags

if __name__ == "__main__":
    with exported(GPIOPin(pin_bed, direction=Out)) as light_bed, \
        exported(GPIOPin(pin_bed_switch, Pin.In, Pin.Rising)) as light_bed_switch, \
        exported(GPIOPin(pin_nightlight, direction=Out)) as light_nightlight:

        light_bed.value = 0
        light_nightlight.value = 0

        pollster = EPoll()
        pollster.register(Server(("",54321),pollster), select.EPOLLIN)
        pollster.register(Switch(light_bed_switch, light_bed), select.EPOLLIN | select.EPOLLET)
        while True:
            evt = pollster.poll()
            for obj, flags in evt:
                readwrite(obj, flags)

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pi@raspberrypi ~ $ python RaPiServer2.py
something went wrong

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pi@raspberrypi ~ $ python RaPiServer2.py
something went wrong
something went wrong
something went wrong
something went wrong

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pi@raspberrypi ~ $ python RaPiServer2.py
something went wrong
something went wrong
something went wrong
something went wrong
Connected from ('192.168.2.113', 43029)
error: uncaptured python exception, closing channel <__main__.Server listening :54321 at 0x4056b4e0> (<type 'exceptions.AttributeError'>:'module' object has no attribute 'EPOLLNVAL' [RaPiServer2.py|readwrite|107])
error: uncaptured python exception, closing channel <__main__.Client connected 192.168.2.113:43029 at 0x4056b7d8> (<type 'exceptions.AttributeError'>:'module' object has no attribute 'EPOLLNVAL' [RaPiServer2.py|readwrite|107])

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        if flags & (select.EPOLLHUP | select.EPOLLERR | select.EPOLLNVAL):

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        if flags & (select.EPOLLHUP | select.EPOLLERR | select.POLLNVAL):

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pi@raspberrypi ~ $ python RaPiServer2.py
something went wrong
something went wrong
something went wrong
something went wrong
Connected from ('192.168.2.113', 48439)
something went wrong
something went wrong
something went wrong
something went wrong

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def readwrite(obj, flags):
    try:
        if flags & select.EPOLLIN:
            obj.handle_read_event()
        if flags & select.EPOLLOUT:
            obj.handle_write_event()
        if flags & select.EPOLLPRI:
            obj.handle_expt_event()
        if flags & (select.EPOLLHUP | select.EPOLLERR | select.EPOLLNVAL):
            obj.handle_close()
    except socket.error, e:
        if e.args[0] not in asyncore._DISCONNECTED:
            obj.handle_error()
        else:
            obj.handle_close()
    except asyncore._reraised_exceptions:
        raise
    except:
        obj.handle_error()