from mmdet3d import apis
Traceback (most recent call last):

 "<stdin>", line 1, in <module>

 "/home/new_mmdetection/mmdetection3d/mmdet3d/apis/__init__.py", line 1, in <module>
from .inference import inference_detector, init_detector, show_result_meshlab

 "/home/new_mmdetection/mmdetection3d/mmdet3d/apis/inference.py", line 8, in <module>
from mmdet3d.core import Box3DMode, show_result

 "/home/new_mmdetection/mmdetection3d/mmdet3d/core/__init__.py", line 2, in <module>
from .bbox import *
# noqa: F401, F403

 "/home/new_mmdetection/mmdetection3d/mmdet3d/core/bbox/__init__.py", line 4, in <module>
from .iou_calculators import (AxisAlignedBboxOverlaps3D, BboxOverlaps3D,

 "/home/new_mmdetection/mmdetection3d/mmdet3d/core/bbox/iou_calculators/__init__.py", line 1, in <module>
from .iou3d_calculator import (AxisAlignedBboxOverlaps3D, BboxOverlaps3D,

 "/home/new_mmdetection/mmdetection3d/mmdet3d/core/bbox/iou_calculators/iou3d_calculator.py", line 5, in <module>
from ..structures import get_box_type

 "/home/new_mmdetection/mmdetection3d/mmdet3d/core/bbox/structures/__init__.py", line 1, in <module>
from .base_box3d import BaseInstance3DBoxes

 "/home/new_mmdetection/mmdetection3d/mmdet3d/core/bbox/structures/base_box3d.py", line 5, in <module>
from mmdet3d.ops.iou3d import iou3d_cuda

 "/home/new_mmdetection/mmdetection3d/mmdet3d/ops/__init__.py", line 5, in <module>
from .ball_query import ball_query

 "/home/new_mmdetection/mmdetection3d/mmdet3d/ops/ball_query/__init__.py", line 1, in <module>
from .ball_query import ball_query

 "/home/new_mmdetection/mmdetection3d/mmdet3d/ops/ball_query/ball_query.py", line 4, in <module>
from . import ball_query_ext
ImportError: cannot import name 'ball_query_ext' 
Traceback (most recent call last):


 "demo.py", line 6, in <module>

import motmetrics as mm


 "/home/nisarg/.local/lib/python2.7/site-packages/motmetrics/__init__.py", line 2, in <module>

from .mot import MOTAccumulator


 "/home/nisarg/.local/lib/python2.7/site-packages/motmetrics/mot.py", line 12, in <module>

from motmetrics.lap import linear_sum_assignment


 "/home/nisarg/.local/lib/python2.7/site-packages/motmetrics/lap.py", line 171, in <module>

init_standard_solvers()


 "/home/nisarg/.local/lib/python2.7/site-packages/motmetrics/lap.py", line 149, in init_standard_solvers

from importlib import util
ImportError: cannot import name util
