「skbuild」が見つからないため、OpenCVのインストールは失敗します

Aug 17 2020

openCVをインストールする必要のあるDockerイメージがありますが、昨日から「skbuild」モジュールが見つからないために失敗し始めました。

Step 12/24 : RUN pip install opencv-python opencv-contrib-python
 ---> Running in a0f746a23aed
Collecting opencv-python
  Downloading https://files.pythonhosted.org/packages/77/f5/49f034f8d109efcf9b7e98fbc051878b83b2f02a1c73f92bbd37f317288e/opencv-python-4.4.0.42.tar.gz (88.9MB)
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-cciracwm/opencv-python/setup.py", line 9, in <module>
        import skbuild
    ModuleNotFoundError: No module named 'skbuild'

また、ホスト上でもそのモジュールが見つからず、pip search何も返さないか、サーバーエラーが返されます。

sudo pip3 search skbuild
WARNING: The directory '/home/ali/.cache/pip' or its parent directory is not owned or is not writable by the current user. The cache has been disabled. Check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
ERROR: Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/dist-packages/pip/_internal/cli/base_command.py", line 216, in _main
    status = self.run(options, args)
  File "/usr/local/lib/python3.6/dist-packages/pip/_internal/commands/search.py", line 60, in run
    pypi_hits = self.search(query, options)
  File "/usr/local/lib/python3.6/dist-packages/pip/_internal/commands/search.py", line 80, in search
    hits = pypi.search({'name': query, 'summary': query}, 'or')
  File "/usr/lib/python3.6/xmlrpc/client.py", line 1112, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib/python3.6/xmlrpc/client.py", line 1452, in __request
    verbose=self.__verbose
  File "/usr/local/lib/python3.6/dist-packages/pip/_internal/network/xmlrpc.py", line 45, in request
    return self.parse_response(response.raw)
  File "/usr/lib/python3.6/xmlrpc/client.py", line 1342, in parse_response
    return u.close()
  File "/usr/lib/python3.6/xmlrpc/client.py", line 656, in close
    raise Fault(**self._stack[0])
xmlrpc.client.Fault: <Fault -32403: 'server error; service unavailable'>

これは、サーバーに問題があるためですか、それとも私のピップに関連しているためですか？

更新

さまざまなpythonバージョンとpipバージョン、pythonバージョン3.6と3.7、pipバージョン19.12と20.2.2と9.0.1（画像内の1つ）で試してみました。

アップデート2

pip install scikit-buildopencvをインストールする前に1つの手順を追加しましたが、cmakeに関連する別のエラーが発生します。

Step 12/25 : RUN pip install scikit-build
 ---> Running in afe0c5c0fca0
Collecting scikit-build
  Downloading https://files.pythonhosted.org/packages/78/c9/7c2c7397ea64e36ebb292446896edcdecbb8c1aa6b9a1a32f6f67984c3df/scikit_build-0.11.1-py2.py3-none-any.whl (72kB)
Collecting packaging (from scikit-build)
  Downloading https://files.pythonhosted.org/packages/46/19/c5ab91b1b05cfe63cccd5cfc971db9214c6dd6ced54e33c30d5af1d2bc43/packaging-20.4-py2.py3-none-any.whl
Requirement already satisfied: wheel>=0.29.0 in /usr/lib/python3/dist-packages (from scikit-build)
Collecting distro (from scikit-build)
  Downloading https://files.pythonhosted.org/packages/25/b7/b3c4270a11414cb22c6352ebc7a83aaa3712043be29daa05018fd5a5c956/distro-1.5.0-py2.py3-none-any.whl
Requirement already satisfied: setuptools>=28.0.0; python_version >= "3" in /usr/lib/python3/dist-packages (from scikit-build)
Requirement already satisfied: six in /usr/lib/python3/dist-packages (from packaging->scikit-build)
Collecting pyparsing>=2.0.2 (from packaging->scikit-build)
  Downloading https://files.pythonhosted.org/packages/8a/bb/488841f56197b13700afd5658fc279a2025a39e22449b7cf29864669b15d/pyparsing-2.4.7-py2.py3-none-any.whl (67kB)
Installing collected packages: pyparsing, packaging, distro, scikit-build
Successfully installed distro-1.5.0 packaging-20.4 pyparsing-2.4.7 scikit-build-0.11.1
Removing intermediate container afe0c5c0fca0
 ---> 533658ddf26d
Step 13/25 : RUN pip install opencv-python opencv-contrib-python
 ---> Running in 0f2c03bc042a
Collecting opencv-python
  Downloading https://files.pythonhosted.org/packages/77/f5/49f034f8d109efcf9b7e98fbc051878b83b2f02a1c73f92bbd37f317288e/opencv-python-4.4.0.42.tar.gz (88.9MB)
Collecting opencv-contrib-python
  Downloading https://files.pythonhosted.org/packages/48/98/05bd8e00c71b66c4e7847cc051cac404191d904df58b51a7dcc3767ff747/opencv_contrib_python-4.2.0.34-cp37-cp37m-manylinux1_x86_64.whl (34.2MB)
Collecting numpy>=1.14.5 (from opencv-python)
  Downloading https://files.pythonhosted.org/packages/3d/d1/90cd7e0b27ee86d77f5386d38b74520486100286d50772377791b6ef22ff/numpy-1.19.1-cp37-cp37m-manylinux1_x86_64.whl (13.4MB)
Building wheels for collected packages: opencv-python
  Running setup.py bdist_wheel for opencv-python: started
  Running setup.py bdist_wheel for opencv-python: finished with status 'error'
  Complete output from command /usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-w49xv99a/opencv-python/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 /tmp/tmpycj03zlwpip-wheel- --python-tag cp37:
  /usr/lib/python3.7/distutils/dist.py:274: UserWarning: Unknown distribution option: 'long_description_content_type'
    warnings.warn(msg)
  Traceback (most recent call last):
    File "/usr/local/lib/python3.7/dist-packages/skbuild/setuptools_wrap.py", line 560, in setup
      cmkr = cmaker.CMaker(cmake_executable)
    File "/usr/local/lib/python3.7/dist-packages/skbuild/cmaker.py", line 95, in __init__
      self.cmake_version = get_cmake_version(self.cmake_executable)
    File "/usr/local/lib/python3.7/dist-packages/skbuild/cmaker.py", line 82, in get_cmake_version
      "Problem with the CMake installation, aborting build. CMake executable is %s" % cmake_executable)
  
  Problem with the CMake installation, aborting build. CMake executable is cmake
  
  ----------------------------------------
  Failed building wheel for opencv-python
  Running setup.py clean for opencv-python
Failed to build opencv-python
Installing collected packages: numpy, opencv-python, opencv-contrib-python
  Found existing installation: numpy 1.13.3
    Not uninstalling numpy at /usr/lib/python3/dist-packages, outside environment /usr
  Running setup.py install for opencv-python: started
    Running setup.py install for opencv-python: finished with status 'error'
    Complete output from command /usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-w49xv99a/opencv-python/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-maky1uyw-record/install-record.txt --single-version-externally-managed --compile:
    /usr/lib/python3.7/distutils/dist.py:274: UserWarning: Unknown distribution option: 'long_description_content_type'
      warnings.warn(msg)
    Traceback (most recent call last):
      File "/usr/local/lib/python3.7/dist-packages/skbuild/setuptools_wrap.py", line 560, in setup
        cmkr = cmaker.CMaker(cmake_executable)
      File "/usr/local/lib/python3.7/dist-packages/skbuild/cmaker.py", line 95, in __init__
        self.cmake_version = get_cmake_version(self.cmake_executable)
      File "/usr/local/lib/python3.7/dist-packages/skbuild/cmaker.py", line 82, in get_cmake_version
        "Problem with the CMake installation, aborting build. CMake executable is %s" % cmake_executable)
    
    Problem with the CMake installation, aborting build. CMake executable is cmake

回答

35 skvark Aug 17 2020 at 19:44

opencv-python PyPIのパッケージFAQを読むと、この特定の問題に対する答えが明確に示されていますpip install --upgrade pip。を実行する必要があります。pip後でバージョンを確認してくださいpip -V。

これは、pipが古すぎて新しいmanylinux2014パッケージ形式を理解できず、ソースからコンパイルしようとしているためです。などのビルド依存関係をインストールするためpipに使用する方法を理解するには古すぎるため、これも失敗pyproject.tomlしscikit-buildます。

私はスポッティングてるもう一つの問題は、あなたが両方をインストールすることであるopencv-pythonとopencv-contrib-python。あなたはこれをすべきではありません。パッケージのPyPIページでも説明されています。opencv-contrib-python-headlessDockerを使用しており、OpenCVのGUI機能を使用していないと想定しているため、おそらくパッケージのみを使用する必要があります。