ModuleNotFoundError: No module named 'mmcv._ext'

[tericalpha]

while using the docker file , after installing the compatible packages , now am getting this new error .
After installing mmcv==0.6.2 and mmdet==2.2.1 facing the error.

[RoyAn2386]

Hi Everyone, Who's trying to install mmtracking.

It's really complicated when we install it. I stuck with it for 1 week and then found out one easier way to install it.
I'll share with you and hope it helps you guys.

Mmtracking

1. Pull this image from Docker Hub:

   docker pull uestc417/tracking

2. Make container from the above image file:

   docker run -it --name an_gpu_2_mmtracking --shm-size=16GB --ipc=host -v /home/user/storage/d_ssd/an:/an --gpus '"device=2"' uestc417/tracking:latest

3. Attach into the above container, git mmtracking by this command:

   **git clone https://github.com/open-mmlab/mmtracking.git**

4. Move into mmtracking folder and verification:

   cd mmtracking

   install requirements:

   pip install -r requirements/build.txt
   pip install -v -e . # or "python [setup.py](http://setup.py/) develop"

   python demo/demo_mot_vis.py configs/mot/deepsort/sort_faster-rcnn_fpn_4e_mot17-private.py --input demo/demo.mp4 --output mot.mp4

   If use MOTChallenge evaluation plz install extra dependencies follow:

   pip install git+https://github.com/JonathonLuiten/TrackEval.git

   Got some errors?

   1. Upgrade pip conmand: /root/anaconda3/bin/python -m pip install --upgrade pip
   2. Upgrade numpy: pip install --upgrade numpy
   3. Upgrade pandas: pip install --upgrade pandas

   If the error shown about “QT”, “xcb” problems, try some solutions follows:

   1. Use opencv headless instead of opencv

   pip uninstall opencv-python
   pip install opencv-python-headless
   

   1. Install this dependencies:

      apt-get install '^libxcb.*-dev' libx11-xcb-dev libglu1-mesa-dev libxrender-dev libxi-dev libxkbcommon-dev libxkbcommon-x11-dev

   2. Turn off display function:

      export DISPLAY=:0

      export QT_QPA_PLATFORM=offscreen

5. Done!