from qsiprep.workflows.dwi.fsl import init_fsl_hmc_wf

wf = init_fsl_hmc_wf(
    {
        'dwi_series': ['.../opposite/sub-1/dwi/sub-1_dir-AP_dwi.nii.gz'],
        'dwi_series_pedir': 'j',
        'fieldmap_info': {
            'suffix': 'rpe_series',
            'rpe_series': ['.../opposite/sub-1/dwi/sub-1_dir-PA_dwi.nii.gz'],
        },
        'concatenated_bids_name': 'sub-1',
    },
    b0_threshold=100,
    impute_slice_threshold=0.,
    fmap_demean=False,
    fmap_bspline=False,
    eddy_config=None,
    source_file='/path/to/dwi/sub-X_dwi.nii.gz',
    omp_nthreads=1,
)