How to use the georinex.rinexheader function in georinex

if verbose:
            print(f'{fn.name}: {e}')
        return

# %% output
    Ntimes = times.size

    if Ntimes == 0:
        return

    ostr = (f"{fn.name}:"
            f" {times[0].isoformat()}"
            f" {times[-1].isoformat()}"
            f" {Ntimes}")

    hdr = gr.rinexheader(fn)
    interval = hdr.get('interval', np.nan)
    if ~np.isnan(interval):
        ostr += f" {interval}"
        Nexpect = (times[-1] - times[0]) // timedelta(seconds=interval) + 1
        if Nexpect != Ntimes:
            logging.warning(f'{fn.name}: expected {Nexpect} but got {Ntimes} times')

    print(ostr)

    if verbose:
        print(times)

def test_zip():
    fn = R/'ABMF00GLP_R_20181330000_01D_30S_MO.zip'
    obs = gr.load(fn)

    assert (obs.sv.values == ['E04', 'E09', 'E12', 'E24', 'G02', 'G05', 'G06', 'G07', 'G09', 'G12', 'G13',
                              'G17', 'G19', 'G25', 'G30', 'R01', 'R02', 'R08', 'R22', 'R23', 'R24', 'S20',
                              'S31', 'S35', 'S38']).all()

    times = gr.gettime(fn)
    assert (times == [datetime(2018, 5, 13, 1, 30), datetime(2018, 5, 13, 1, 30, 30),  datetime(2018, 5, 13, 1, 31)]).all()

    hdr = gr.rinexheader(fn)
    assert hdr['t0'] <= times[0]

def test_dont_care_file_extension():
    """ GeoRinex ignores the file extension and only considers file headers to determine what a file is."""
    fn = R / 'brdc0320.16l.txt'

    hdr = gr.rinexheader(R/fn)
    assert int(hdr['version']) == 3

    nav = gr.load(fn)
    assert nav.ionospheric_corr_GAL == approx([139, 0.132, 0.0186])

def test_header(fn, rtype, vers):

    if fn.suffix == '.nc' and netCDF4 is None:
        pytest.skip('no netCDF4')

    hdr = gr.rinexheader(fn)
    assert isinstance(hdr, dict)
    assert rtype in hdr['rinextype']
    assert hdr['version'] == pytest.approx(vers)

    # make sure string filenames work too
    hdr = gr.rinexheader(str(fn))
    assert isinstance(hdr, dict)

def test_header(fn, rtype, vers):

    if fn.suffix == '.nc' and netCDF4 is None:
        pytest.skip('no netCDF4')

    hdr = gr.rinexheader(fn)
    assert isinstance(hdr, dict)
    assert rtype in hdr['rinextype']
    assert hdr['version'] == pytest.approx(vers)

    # make sure string filenames work too
    hdr = gr.rinexheader(str(fn))
    assert isinstance(hdr, dict)