版权声明:belongs to tony2278 https://blog.csdn.net/tony2278/article/details/89189359
im2rec.py: error: the following arguments are required: prefix, root
cgroup.add_argument('--list', action='store_true',
help='If this is set im2rec will create image list(s) by traversing root folder\
and output to <prefix>.lst.\
Otherwise im2rec will read <prefix>.lst and create a database at <prefix>.rec')