Failed building wheel for pycocotools ubuntu

We list some potential troubles encountered by users and developers, along with their corresponding solutions. Feel free to enrich the list if you find any frequent issues and contribute your solutions to solve them. If you have any trouble with environment configuration, model training, etc, please create an issue using the provided templates and fill in all required information in the template.

MMCV/MMDet/MMDet3D Installation¶

If you faced the error shown below when importing open3d:
OSError: /lib/x86_64-linux-gnu/libm.so.6: version 'GLIBC_2.27' not found
please downgrade open3d to 0.9.0.0, because the latest open3d needs the support of file ‘GLIBC_2.27’, which only exists in Ubuntu 18.04, not in Ubuntu 16.04.
If you faced the error when importing pycocotools, this is because nuscenes-devkit installs pycocotools but mmdet relies on mmpycocotools. The current workaround is as below. We will migrate to use pycocotools in the future.
```
pip uninstall pycocotools mmpycocotools
pip install mmpycocotools
```
NOTE: We have migrated to use pycocotools in mmdet3d >= 0.13.0.
If you face the error shown below, and your environment contains numba == 0.48.0 with numpy >= 1.20.0:
TypeError: expected dtype object, got 'numpy.dtype[bool_]'
please downgrade numpy to < 1.20.0 or install numba == 0.48 from source, because in numpy == 1.20.0, np.dtype produces subclass due to API change. Please refer to here for more details.
If you face the error shown below when importing pycocotools:
ValueError: numpy.ndarray size changed, may indicate binary incompatibility. Expected 88 from C header, got 80 from PyObject
please downgrade pycocotools to 2.0.1 because of the incompatibility between the newest pycocotools and numpy < 1.20.0. Or you can compile and install the latest pycocotools from source as below:
pip install -e "git+https://github.com/cocodataset/cocoapi#egg=pycocotools&subdirectory=PythonAPI"
or
pip install -e "git+https://github.com/ppwwyyxx/cocoapi#egg=pycocotools&subdirectory=PythonAPI"

How to annotate point cloud?¶

MMDetection3D does not support point cloud annotation. Some open-source annotation tool are offered for reference:

SUSTechPOINTS
LATTE

Besides, we improved LATTE for better use. More details can be found here.

(CV202001) PS C:\Users\niu> pip install pycocotools

Collecting pycocotools

Using cached https://files.pythonhosted.org/packages/96/84/9a07b1095fd8555ba3f3d519517c8743c2554a245f9476e5e39869f948d2/pycocotools-2.0.0.tar.gz

Building wheels for collected packages: pycocotools

Building wheel for pycocotools (setup.py) ... error

ERROR: Command errored out with exit status 1:

command: 'D:\ProgramData\Anaconda3\envs\CV202001\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\niu\\AppData\\Local\\Temp\\pip-install-f24aas2b\\pycocotools\\setup.py'"'"'; __file__='"'"'C:\\Users\\niu\\AppData\\Local\\Temp\\pip-install-f24aas2b\\pycocotools\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d 'C:\Users\niu\AppData\Local\Temp\pip-wheel-_fwfwnii' --python-tag cp36

cwd: C:\Users\niu\AppData\Local\Temp\pip-install-f24aas2b\pycocotools\

Complete output (19 lines):

running bdist_wheel

running build

running build_py

creating build

creating build\lib.win-amd64-3.6

creating build\lib.win-amd64-3.6\pycocotools

copying pycocotools\coco.py -> build\lib.win-amd64-3.6\pycocotools

copying pycocotools\cocoeval.py -> build\lib.win-amd64-3.6\pycocotools

copying pycocotools\mask.py -> build\lib.win-amd64-3.6\pycocotools

copying pycocotools\__init__.py -> build\lib.win-amd64-3.6\pycocotools

running build_ext

building 'pycocotools._mask' extension

creating build\temp.win-amd64-3.6

creating build\temp.win-amd64-3.6\Release

creating build\temp.win-amd64-3.6\Release\pycocotools

creating build\temp.win-amd64-3.6\Release\common

D:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\x86_amd64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -ID:\ProgramData\Anaconda3\envs\CV202001\lib\site-packages\numpy\core\include -Icommon -ID:\ProgramData\Anaconda3\envs\CV202001\include -ID:\ProgramData\Anaconda3\envs\CV202001\include "-ID:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\INCLUDE" "-ID:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\ATLMFC\INCLUDE" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.1\include\um" "-IC:\Program Files (x86)\Windows Kits\8.1\include\\shared" "-IC:\Program Files (x86)\Windows Kits\8.1\include\\um" "-IC:\Program Files (x86)\Windows Kits\8.1\include\\winrt" /Tcpycocotools/_mask.c /Fobuild\temp.win-amd64-3.6\Release\pycocotools/_mask.obj -Wno-cpp -Wno-unused-function -std=c99

cl: 命令行 error D8021 :无效的数值参数“/Wno-cpp”

error: command 'D:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\BIN\\x86_amd64\\cl.exe' failed with exit status 2

----------------------------------------

ERROR: Failed building wheel for pycocotools

Running setup.py clean for pycocotools

Failed to build pycocotools

Installing collected packages: pycocotools

Running setup.py install for pycocotools ... error

ERROR: Command errored out with exit status 1:

command: 'D:\ProgramData\Anaconda3\envs\CV202001\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\niu\\AppData\\Local\\Temp\\pip-install-f24aas2b\\pycocotools\\setup.py'"'"'; __file__='"'"'C:\\Users\\niu\\AppData\\Local\\Temp\\pip-install-f24aas2b\\pycocotools\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\niu\AppData\Local\Temp\pip-record-8f1bp3n2\install-record.txt' --single-version-externally-managed --compile

cwd: C:\Users\niu\AppData\Local\Temp\pip-install-f24aas2b\pycocotools\

Complete output (19 lines):

running install

running build

running build_py

creating build

creating build\lib.win-amd64-3.6

creating build\lib.win-amd64-3.6\pycocotools

copying pycocotools\coco.py -> build\lib.win-amd64-3.6\pycocotools

copying pycocotools\cocoeval.py -> build\lib.win-amd64-3.6\pycocotools

copying pycocotools\mask.py -> build\lib.win-amd64-3.6\pycocotools

copying pycocotools\__init__.py -> build\lib.win-amd64-3.6\pycocotools

running build_ext

building 'pycocotools._mask' extension

creating build\temp.win-amd64-3.6

creating build\temp.win-amd64-3.6\Release

creating build\temp.win-amd64-3.6\Release\pycocotools

creating build\temp.win-amd64-3.6\Release\common

cl: 命令行 error D8021 :无效的数值参数“/Wno-cpp”

error: command 'D:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\BIN\\x86_amd64\\cl.exe' failed with exit status 2

----------------------------------------

ERROR: Command errored out with exit status 1: 'D:\ProgramData\Anaconda3\envs\CV202001\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\niu\\AppData\\Local\\Temp\\pip-install-f24aas2b\\pycocotools\\setup.py'"'"'; __file__='"'"'C:\\Users\\niu\\AppData\\Local\\Temp\\pip-install-f24aas2b\\pycocotools\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\User