def _read_filter(fid):
 f = dict()
 f['freq'] = _read_double(fid)[0]
 f['class'] = _read_int(fid)
 f['type'] = _read_int(fid)
 f['npar'] = _read_int2(fid)
 f['pars'] = _read_double(fid, f['npar'])
 return f

def _read_filter ( fid ) : f = dict ( ) f [ 'freq' ] = _read_double ( fid ) [ 0 ] f [ 'class' ] = _read_int ( fid ) f [ 'type' ] = _read_int ( fid ) f [ 'npar' ] = _read_int2 ( fid ) f [ 'pars' ] = _read_double ( fid , f [ 'npar' ] ) return f
read filter information .