blackrockio.py 文件源码

def __extract_nsx_file_spec(self, nsx_nb):
        """
        Extract file specification from an .nsx file.
        """
        filename = '.'.join([self._filenames['nsx'], 'ns%i' % nsx_nb])

        # Header structure of files specification 2.2 and higher. For files 2.1
        # and lower, the entries ver_major and ver_minor are not supported.
        dt0 = [
            ('file_id', 'S8'),
            ('ver_major', 'uint8'),
            ('ver_minor', 'uint8')]

        nsx_file_id = np.fromfile(filename, count=1, dtype=dt0)[0]
        if nsx_file_id['file_id'].decode() == 'NEURALSG':
            spec = '2.1'
        elif nsx_file_id['file_id'].decode() == 'NEURALCD':
            spec = '{0}.{1}'.format(
                nsx_file_id['ver_major'], nsx_file_id['ver_minor'])
        else:
            raise IOError('Unsupported NSX file type.')

        return spec