def bound3ds_to_list(bound3ds):
    """Convert instance of class Bound to python list.

    """
    bound3ds_list = []
    for bound3d in bound3ds:
        bound_dict = {'cube':bound3d.cube, 'pathch_number':bound3d.get_patch_num(),\
                'score':bound3d.score, 'label':bound3d.label}
        bound3ds_list.append(bound_dict)
    return bound3ds_list