Results 3 issues of Prima Sanjaya

i run download_and_convert_data and got this error: module 'libs.datasets.pycocotools.common' has no attribute 'iou' why?

how to run voc-fcn? i got this error 'No module named 'utils''

i train this network using the default setting and until 20 epoch, the result is still bad (i can't see any face). How many epoch should we set? or do...