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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def flush(self):
        '''
        Flushes the buffer to socket. Only call when the write is done. Calling flush after each write will prevent the buffer to act as efficiently as possible
        '''
        # return if empty
        if self.__bufferidx == 0:
            return 
        # send here the data
        self.conn.send("%s\r\n" % hex(self.__bufferidx)[2:])
        self.conn.send("%s\r\n" % ''.join(self.__buffer[0:self.__bufferidx]))
        # reset buffer index = 0 (beginning of the buffer)
        self.__bufferidx = 0