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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 read(self, maxsignals=None):
 """ Read information about currently pending signals. :param maxsignals: Maximum number of signals to read. By default this is the same as the number of signals registered with this signalfd. :returns: A list of signalfd_siginfo object with information about most recently read signals. This list may be empty (in non-blocking mode). :raises ValueError: If :meth:`closed()` is True Read up to maxsignals recent pending singals ouf of the set of signals being monitored by this signalfd. If there are no signals yet and SFD_NONBLOCK was not passed to flags in :meth:`__init__()` then this call blocks until such signal is ready. """

        if maxsignals is None:
            maxsignals = len(self._signals)
        if maxsignals <= 0:
            raise ValueError("maxsignals must be greater than 0")
        info_list = (signalfd_siginfo * maxsignals)()
        num_read = read(self._sfd, byref(info_list), sizeof(info_list))
        return info_list[:num_read // sizeof(signalfd_siginfo)]