Traceback (most recent call last):


 "demo.py", line 11, in <module>

from detectors.detector_factory import detector_factory


 "/home/rencong/CenterNet/src/lib/detectors/detector_factory.py", line 5, in <module>

from .exdet import ExdetDetector


 "/home/rencong/CenterNet/src/lib/detectors/exdet.py", line 22, in <module>

from .base_detector import BaseDetector


 "/home/rencong/CenterNet/src/lib/detectors/base_detector.py", line 11, in <module>

from models.model import create_model, load_model


 "/home/rencong/CenterNet/src/lib/models/model.py", line 12, in <module>

from .networks.pose_dla_dcn import get_pose_net as get_dla_dcn


 "/home/rencong/CenterNet/src/lib/models/networks/pose_dla_dcn.py", line 16, in <module>

from .DCNv2.dcn_v2 import DCN


 "/home/rencong/CenterNet/src/lib/models/networks/DCNv2/dcn_v2.py", line 13, in <module>

import _ext as _backend
ImportError: /home/rencong/CenterNet/src/lib/models/networks/DCNv2/_ext.cpython-36m-x86_64-linux-gnu.so: undefined symbol: _ZN3c105ErrorC1ENS_14SourceLocationERKSs
Traceback (most recent call last):


 "/usr/local/bin/docker-compose", line 6, in <module>

from compose.cli.main import main


 "/usr/local/lib/python2.7/dist-packages/compose/cli/main.py", line 18, in <module>

import docker.errors


 "/usr/local/lib/python2.7/dist-packages/docker/__init__.py", line 2, in <module>

from .api import APIClient


 "/usr/local/lib/python2.7/dist-packages/docker/api/__init__.py", line 2, in <module>

from .client import APIClient


 "/usr/local/lib/python2.7/dist-packages/docker/api/client.py", line 10, in <module>

from .build import BuildApiMixin


 "/usr/local/lib/python2.7/dist-packages/docker/api/build.py", line 6, in <module>

from .. import auth


 "/usr/local/lib/python2.7/dist-packages/docker/auth.py", line 9, in <module>

from .utils import config


 "/usr/local/lib/python2.7/dist-packages/docker/utils/__init__.py", line 3, in <module>

from .decorators import check_resource, minimum_version, update_headers


 "/usr/local/lib/python2.7/dist-packages/docker/utils/decorators.py", line 4, in <module>

from . import utils


 "/usr/local/lib/python2.7/dist-packages/docker/utils/utils.py", line 13, in <module>

from .. import tls


 "/usr/local/lib/python2.7/dist-packages/docker/tls.py", line 5, in <module>

from .transport import SSLHTTPAdapter


 "/usr/local/lib/python2.7/dist-packages/docker/transport/__init__.py", line 3, in <module>

from .ssladapter import SSLHTTPAdapter


 "/usr/local/lib/python2.7/dist-packages/docker/transport/ssladapter.py", line 23, in <module>

from backports.ssl_match_hostname import match_hostname
ImportError: No module named ssl_match_hostname
