def doRead(self):
        """
        Called when my socket is ready for reading.
        """
        read = 0
        while read < self.maxThroughput:
            try:
                data, addr = self.socket.recvfrom(self.maxPacketSize)
                read += len(data)
                self.protocol.datagramReceived(data)
            except socket.error as se:
                no = se.args[0]
                if no in (EAGAIN, EINTR, EWOULDBLOCK):
                    return
                if no == ECONNREFUSED:
                    self.protocol.connectionRefused()
                else:
                    raise
            except:
                log.deferr()

        Called when my socket is ready for reading.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/unix.py