blackrockio.py 文件源码

def __extract_nev_file_spec(self):
        """
        Extract file specification from an .nsx file
        """
        filename = '.'.join([self._filenames['nsx'], 'nev'])
        # 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')]

        nev_file_id = np.fromfile(filename, count=1, dtype=dt0)[0]
        if nev_file_id['file_id'].decode() == 'NEURALEV':
            spec = '{0}.{1}'.format(
                nev_file_id['ver_major'], nev_file_id['ver_minor'])
        else:
            raise IOError('NEV file type {0} is not supported'.format(
                nev_file_id['file_id']))

        return spec