How to use the gsd.hoomd function in gsd

def test_create(tmp_path):
    """Test that gsd files can be created."""
    with gsd.hoomd.open(name=tmp_path / "test_create.gsd", mode='wb') as hf:
        assert hf.file.schema == 'hoomd'
        assert hf.file.schema_version >= (1, 0)

def create_frame(i):
    """Helper function to create snapshot objects."""
    snap = gsd.hoomd.Snapshot()
    snap.configuration.step = i + 1
    return snap

def test_gsd_gsd(self):
        import gsd.hoomd
        with gsd.hoomd.open(LJ_GSD, 'rb') as traj:
            self.run_analyses(traj)

def test_slicing_and_iteration(tmp_path, open_mode):
    """Test that hoomd trajectories can be sliced."""
    with gsd.hoomd.open(name=tmp_path / "test_slicing.gsd",
                        mode=open_mode.write) as hf:
        hf.extend((create_frame(i) for i in range(20)))

    with gsd.hoomd.open(name=tmp_path / "test_slicing.gsd",
                        mode=open_mode.read) as hf:
        # Test len()-function on trajectory and sliced trajectory.
        assert len(hf) == 20
        assert len(hf[:10]) == 10

        # Test len()-function with explicit iterator.
        assert len(iter(hf)) == len(hf)
        assert len(iter(hf[:10])) == len(hf[:10])

        # Test iteration with implicit iterator.
        # All iterations are run twice to check for issues
        # with iterator exhaustion.

def write_frame(file, frame, position, orientation):
    """Write a frame to the file."""
    snap = gsd.hoomd.Snapshot()
    snap.particles.N = position.shape[0]
    snap.configuration.step = frame * 10
    position[0][0] = frame
    orientation[0][0] = frame
    snap.particles.position = position
    snap.particles.orientation = orientation
    file.append(snap)

def read_xml(name):
    snap = gsd.hoomd.Snapshot()

    # parse the XML file
    dom = xml.dom.minidom.parse(open(name, 'rb'))
    hoomd_xml = dom.getElementsByTagName('hoomd_xml')
    if len(hoomd_xml) != 1:
        raise RuntimeError("hoomd_xml tag not found in xml file")
    else:
        hoomd_xml = hoomd_xml[0]

    configuration = hoomd_xml.getElementsByTagName('configuration')
    if len(configuration) != 1:
        raise RuntimeError("configuration tag not found in xml file")
    else:
        configuration = configuration[0]

    # determine the number of dimensions

orientation = numpy.random.random((N, 4)).astype('float32')

    nframes = compute_nframes(N, size)
    actual_size = compute_actual_size(N, nframes)
    nframes_read = int(nframes * bmark_read_size / actual_size)
    bmark_read_size = compute_actual_size(N, nframes_read)
    if nframes_read > nframes:
        nframes_read = nframes
        bmark_read_size = actual_size

    # first, write the file and time how long it takes
    print("Writing file: ", file=sys.stderr, flush=True)

    # if the file size is small, write it once to warm up the disk
    if size < 64 * 1024**3:
        gsd.hoomd.open(mode='wb', name='test.gsd')
        with gsd.hoomd.open(name='test.gsd', mode='wb') as hf:
            write_file(hf, nframes, N, position, orientation)

    # write it again and time this one
    gsd.hoomd.open(mode='wb', name='test.gsd')
    with gsd.hoomd.open(name='test.gsd', mode='wb') as hf:
        start = time.time()
        write_file(hf, nframes, N, position, orientation)

    # ensure that all writes to disk are completed and drop file system cache
    call(['sudo', '/bin/sync'])
    call(['sudo', '/sbin/sysctl', 'vm.drop_caches=3'], stdout=PIPE)

    end = time.time()

    timings['write'] = actual_size / 1024**2 / (end - start)

bmark_read_size = compute_actual_size(N, nframes_read)
    if nframes_read > nframes:
        nframes_read = nframes
        bmark_read_size = actual_size

    # first, write the file and time how long it takes
    print("Writing file: ", file=sys.stderr, flush=True)

    # if the file size is small, write it once to warm up the disk
    if size < 64 * 1024**3:
        gsd.hoomd.open(mode='wb', name='test.gsd')
        with gsd.hoomd.open(name='test.gsd', mode='wb') as hf:
            write_file(hf, nframes, N, position, orientation)

    # write it again and time this one
    gsd.hoomd.open(mode='wb', name='test.gsd')
    with gsd.hoomd.open(name='test.gsd', mode='wb') as hf:
        start = time.time()
        write_file(hf, nframes, N, position, orientation)

    # ensure that all writes to disk are completed and drop file system cache
    call(['sudo', '/bin/sync'])
    call(['sudo', '/sbin/sysctl', 'vm.drop_caches=3'], stdout=PIPE)

    end = time.time()

    timings['write'] = actual_size / 1024**2 / (end - start)

    # time how long it takes to open the file
    print("Opening file... ", file=sys.stderr, flush=True, end='')
    start = time.time()
    with gsd.hoomd.open(name='test.gsd', mode='rb') as hf: