from collections import namedtuple
from dmriprep.workflows.dwi import init_dwi_preproc_wf
BIDSLayout = namedtuple('BIDSLayout', ['root'])
wf = init_dwi_preproc_wf(
    layout=BIDSLayout('.'),
    subject_id='dmripreptest',
    dwi_file='/madeup/path/sub-01_dwi.nii.gz',
    metadata=Ord{'PhaseEncodingDirection': 'j-', 'TotalReadoutTime': 0.05},
    b0_thresh=5,
    output_resolution=(1, 1, 1),
    bet_dwi=0.3,
    bet_mag=0.3,
    omp_nthreads=1,
    ignore=['fieldmaps'],
    synb0_dir=''
)