some issues about the options.py in dehazeflow.yaml

[mengxzh15]

in the options.py, the code opt['path']['root'] = osp.abspath(osp.join(file, osp.pardir, osp.pardir, osp.pardir)), I cannot find out the 'root' in the dehazeflow.yaml. Otherwise, what is the means of the file? there needs one file such as a.file. Could you show the corrected code? thank you.