ERROR: Failed building wheel for opencv-python: [ FileNotFoundError: [Errno 2] No such file or directory: '_skbuild/linux-armv7l-3.9/cmake-install/python/cv2/config-3.py' ]

[UncleBob125]

Expected behaviour

I tried to install opencv-python in my virtual environment and was expecting the opencv-python library v4.7.0.72 to be installed succesfully.
Even after multiple tries and trying different solutions/workarounds found online, nothing seems to help.

Actual behaviour

The build runs for +-3 hours, goes to 100% and then later on fails during installation phase of the project.
Following error is being returned:
FileNotFoundError: [Errno 2] No such file or directory: '_skbuild/linux-armv7l-3.9/cmake-install/python/cv2/config-3.py'
error: subprocess-exited-with-error

Steps to reproduce

• pip3 install --upgrade pip

result

(venv) username@raspberrypi:~/Desktop/myApp $ pip3 install --upgrade pip
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Requirement already satisfied: pip in ./venv/lib/python3.9/site-packages (23.0.1)

• pip3 install opencv-python --verbose

result

(venv) username@raspberrypi:~/Desktop/MyApp $ pip3 install opencv-py                                                                                                                                                             thon --verbose
Using pip 23.0.1 from /home/username/Desktop/MyApp/venv/lib/python3.                                                                                                                                                             9/site-packages/pip (python 3.9)
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting opencv-python
  Using cached opencv-python-4.7.0.72.tar.gz (91.1 MB)
  Running command pip subprocess to install build dependencies
  Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple,                                                                                                                                                              https://www.piwheels.org/simple
  Ignoring numpy: markers 'python_version == "3.6" and platform_machine != "aarc                                                                                                                                                             h64" and platform_machine != "arm64"' don't match your environment
  Ignoring numpy: markers 'python_version == "3.7" and platform_machine != "aarc                                                                                                                                                             h64" and platform_machine != "arm64"' don't match your environment
  Ignoring numpy: markers 'python_version == "3.8" and platform_machine != "aarc                                                                                                                                                             h64" and platform_machine != "arm64"' don't match your environment
  Ignoring numpy: markers 'python_version <= "3.9" and sys_platform == "linux" a                                                                                                                                                             nd platform_machine == "aarch64"' don't match your environment
  Ignoring numpy: markers 'python_version <= "3.9" and sys_platform == "darwin"                                                                                                                                                              and platform_machine == "arm64"' don't match your environment
  Ignoring numpy: markers 'python_version == "3.10" and platform_system != "Darw                                                                                                                                                             in"' don't match your environment
  Ignoring numpy: markers 'python_version == "3.10" and platform_system == "Darw                                                                                                                                                             in"' don't match your environment
  Ignoring numpy: markers 'python_version >= "3.11"' don't match your environmen                                                                                                                                                             t
  Collecting setuptools==59.2.0
    Using cached https://www.piwheels.org/simple/setuptools/setuptools-59.2.0-py                                                                                                                                                             3-none-any.whl (952 kB)
  Collecting wheel==0.37.0
    Using cached https://www.piwheels.org/simple/wheel/wheel-0.37.0-py2.py3-none                                                                                                                                                             -any.whl (35 kB)
  Collecting cmake>=3.1
    Using cached https://www.piwheels.org/simple/cmake/cmake-3.25.2-cp39-cp39-linux_armv7l.whl (17.3 MB)
  Collecting pip
    Using cached https://www.piwheels.org/simple/pip/pip-23.0.1-py3-none-any.whl (2.1 MB)
  Collecting scikit-build>=0.13.2
    Using cached https://www.piwheels.org/simple/scikit-build/scikit_build-0.16.7-py3-none-any.whl (79 kB)
  Collecting numpy==1.19.3
    Using cached https://www.piwheels.org/simple/numpy/numpy-1.19.3-cp39-cp39-linux_armv7l.whl (10.5 MB)
  Collecting packaging
    Using cached https://www.piwheels.org/simple/packaging/packaging-23.0-py3-none-any.whl (42 kB)
  Collecting distro
    Using cached https://www.piwheels.org/simple/distro/distro-1.8.0-py3-none-any.whl (20 kB)
  Installing collected packages: cmake, wheel, setuptools, pip, packaging, numpy, distro, scikit-build
  ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
  matplotlib 3.7.1 requires numpy>=1.20, but you have numpy 1.19.3 which is incompatible.
  Successfully installed cmake-3.25.2 distro-1.8.0 numpy-1.19.3 packaging-23.0 pip-23.0.1 scikit-build-0.16.7 setuptools-59.2.0 wheel-0.37.0
  Installing build dependencies ... done
  Running command Getting requirements to build wheel
  running egg_info
  writing opencv_python.egg-info/PKG-INFO
  writing dependency_links to opencv_python.egg-info/dependency_links.txt
  writing requirements to opencv_python.egg-info/requires.txt
  writing top-level names to opencv_python.egg-info/top_level.txt
  reading manifest file 'opencv_python.egg-info/SOURCES.txt'
  reading manifest template 'MANIFEST.in'
  warning: no files found matching '*' under directory 'opencv_contrib'
  adding license file 'LICENSE-3RD-PARTY.txt'
  adding license file 'LICENSE.txt'
  writing manifest file 'opencv_python.egg-info/SOURCES.txt'
  Getting requirements to build wheel ... done
  Running command Preparing metadata (pyproject.toml)
  running dist_info
  creating /tmp/pip-modern-metadata-6qbzchkt/opencv_python.egg-info
  writing /tmp/pip-modern-metadata-6qbzchkt/opencv_python.egg-info/PKG-INFO
  writing dependency_links to /tmp/pip-modern-metadata-6qbzchkt/opencv_python.egg-info/dependency_links.txt
  writing requirements to /tmp/pip-modern-metadata-6qbzchkt/opencv_python.egg-info/requires.txt
  writing top-level names to /tmp/pip-modern-metadata-6qbzchkt/opencv_python.egg-info/top_level.txt
  writing manifest file '/tmp/pip-modern-metadata-6qbzchkt/opencv_python.egg-info/SOURCES.txt'
  reading manifest file '/tmp/pip-modern-metadata-6qbzchkt/opencv_python.egg-info/SOURCES.txt'
  reading manifest template 'MANIFEST.in'
  warning: no files found matching '*' under directory 'opencv_contrib'
  adding license file 'LICENSE-3RD-PARTY.txt'
  adding license file 'LICENSE.txt'
  writing manifest file '/tmp/pip-modern-metadata-6qbzchkt/opencv_python.egg-info/SOURCES.txt'
  creating '/tmp/pip-modern-metadata-6qbzchkt/opencv_python.dist-info'
  adding license file "LICENSE-3RD-PARTY.txt" (matched pattern "LICEN[CS]E*")
  adding license file "LICENSE.txt" (matched pattern "LICEN[CS]E*")
  Preparing metadata (pyproject.toml) ... done
Requirement already satisfied: numpy>=1.17.3 in ./venv/lib/python3.9/site-packages (from opencv-python) (1.24.2)
Building wheels for collected packages: opencv-python
  Running command Building wheel for opencv-python (pyproject.toml)
  patching file opencv/3rdparty/openexr/IlmImf/ImfSystemSpecific.cpp


  --------------------------------------------------------------------------------
  -- Trying 'Ninja' generator
  --------------------------------
  ---------------------------
  ----------------------
  -----------------
  ------------
  -------
  --
  Not searching for unused variables given on the command line.
  CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
  -- Configuring incomplete, errors occurred!
  See also "/tmp/pip-install-6_x1lqim/opencv-python_5f225b8f191e4bdf9b9078bacd8de511/_cmake_test_compile/build/CMakeFiles/CMakeOutput.log".
  --
  -------
  ------------
  -----------------
  ----------------------
  ---------------------------
  --------------------------------
  -- Trying 'Ninja' generator - failure
  --------------------------------------------------------------------------------



  --------------------------------------------------------------------------------
  -- Trying 'Unix Makefiles' generator
  --------------------------------
  ---------------------------
  ----------------------
  -----------------
  ------------
  -------
  --
  Not searching for unused variables given on the command line.
  -- The C compiler identification is GNU 10.2.1
  -- Detecting C compiler ABI info
  -- Detecting C compiler ABI info - done
  -- Check for working C compiler: /usr/bin/cc - skipped
  -- Detecting C compile features
  -- Detecting C compile features - done
  -- The CXX compiler identification is GNU 10.2.1
  -- Detecting CXX compiler ABI info
  -- Detecting CXX compiler ABI info - done
  -- Check for working CXX compiler: /usr/bin/c++ - skipped
  -- Detecting CXX compile features
  -- Detecting CXX compile features - done
  -- Configuring done
  -- Generating done
  -- Build files have been written to: /tmp/pip-install-6_x1lqim/opencv-python_5f225b8f191e4bdf9b9078bacd8de511/_cmake_test_compile/build
  --
  -------
  ------------
  -----------------
  ----------------------
  ---------------------------
  --------------------------------
  -- Trying 'Unix Makefiles' generator - success
  --------------------------------------------------------------------------------

  Configuring Project
    Working directory:
      /tmp/pip-install-6_x1lqim/opencv-python_5f225b8f191e4bdf9b9078bacd8de511/_skbuild/linux-armv7l-3.9/cmake-build
    Command:
      /tmp/pip-build-env-m8axndlg/overlay/lib/python3.9/site-packages/cmake/data/bin/cmake /tmp/pip-install-6_x1lqim/opencv-python_5f225b8f191e4bdf9b9078bacd8de511/opencv -G 'Unix Makefiles' -DCMAKE_INSTALL_PREFIX:PATH=/tmp/pip-install-6_x1lqim/opencv-python_5f225b8f191e4bdf9b9078bacd8de511/_skbuild/linux-armv7l-3.9/cmake-install -DPYTHON_VERSION_STRING:STRING=3.9.2 -DSKBUILD:INTERNAL=TRUE -DCMAKE_MODULE_PATH:PATH=/tmp/pip-build-env-m8axndlg/overlay/lib/python3.9/site-packages/skbuild/resources/cmake -DPYTHON_EXECUTABLE:PATH=/home/username/Desktop/MyApp/venv/bin/python -DPYTHON_INCLUDE_DIR:PATH=/usr/include/python3.9 -DPYTHON_LIBRARY:PATH=/usr/lib/arm-linux-gnueabihf/libpython3.9.so -DPython_EXECUTABLE:PATH=/home/username/Desktop/MyApp/venv/bin/python -DPython_ROOT_DIR:PATH=/home/username/Desktop/MyApp/venv -DPython_INCLUDE_DIR:PATH=/usr/include/python3.9 -DPython_FIND_REGISTRY:STRING=NEVER -DPython3_EXECUTABLE:PATH=/home/username/Desktop/MyApp/venv/bin/python -DPython3_ROOT_DIR:PATH=/home/username/Desktop/MyApp/venv -DPython3_INCLUDE_DIR:PATH=/usr/include/python3.9 -DPython3_FIND_REGISTRY:STRING=NEVER -DPYTHON3_EXECUTABLE=/home/username/Desktop/MyApp/venv/bin/python -DPYTHON3_INCLUDE_DIR=/usr/include/python3.9 -DPYTHON3_LIBRARY=/usr/lib/arm-linux-gnueabihf/libpython3.9.so -DBUILD_opencv_python3=ON -DBUILD_opencv_python2=OFF -DBUILD_opencv_java=OFF -DOPENCV_PYTHON3_INSTALL_PATH=python -DINSTALL_CREATE_DISTRIB=ON -DBUILD_opencv_apps=OFF -DBUILD_opencv_freetype=OFF -DBUILD_SHARED_LIBS=OFF -DBUILD_TESTS=OFF -DBUILD_PERF_TESTS=OFF -DBUILD_DOCS=OFF -DPYTHON3_LIMITED_API=ON -DBUILD_OPENEXR=ON -DCMAKE_BUILD_TYPE:STRING=Release

  -- The CXX compiler identification is GNU 10.2.1
  -- The C compiler identification is GNU 10.2.1
  -- Detecting CXX compiler ABI info
  -- Detecting CXX compiler ABI info - done
  -- Check for working CXX compiler: /usr/bin/c++ - skipped
  -- Detecting CXX compile features
  -- Detecting CXX compile features - done
  -- Detecting C compiler ABI info
  -- Detecting C compiler ABI info - done
  -- Check for working C compiler: /usr/bin/cc - skipped
  -- Detecting C compile features
  -- Detecting C compile features - done
  -- ocv_init_download: OpenCV source tree is not fetched as git repository. 3rdparty resources will be downloaded from github.com by default.
  -- Detected processor: armv7l
  -- Found PythonInterp: /home/username/Desktop/MyApp/venv/bin/python (found suitable version "3.9.2", minimum required is "2.7")
  CMake Warning at cmake/OpenCVDetectPython.cmake:81 (message):
    CMake's 'find_host_package(PythonInterp 2.7)' found wrong Python version:

    PYTHON_EXECUTABLE=/home/username/Desktop/MyApp/venv/bin/python

    PYTHON_VERSION_STRING=3.9.2

    Consider providing the 'PYTHON2_EXECUTABLE' variable via CMake command line
    or environment variables

  Call Stack (most recent call first):
    cmake/OpenCVDetectPython.cmake:271 (find_python)
    CMakeLists.txt:643 (include)


  -- Could NOT find Python2 (missing: Python2_EXECUTABLE Interpreter)
      Reason given by package:
          Interpreter: Wrong major version for the interpreter "/bin/python"

  -- Found PythonInterp: /home/username/Desktop/MyApp/venv/bin/python (found suitable version "3.9.2", minimum required is "3.2")
  -- Found PythonLibs: /usr/lib/arm-linux-gnueabihf/libpython3.9.so (found suitable exact version "3.9.2")
  Traceback (most recent call last):
    File "/tmp/pip-build-env-m8axndlg/overlay/lib/python3.9/site-packages/numpy/core/__init__.py", line 22, in <module>
      from . import multiarray
    File "/tmp/pip-build-env-m8axndlg/overlay/lib/python3.9/site-packages/numpy/core/multiarray.py", line 12, in <module>
      from . import overrides
    File "/tmp/pip-build-env-m8axndlg/overlay/lib/python3.9/site-packages/numpy/core/overrides.py", line 7, in <module>
      from numpy.core._multiarray_umath import (
  ImportError: libcblas.so.3: cannot open shared object file: No such file or directory

  During handling of the above exception, another exception occurred:

  Traceback (most recent call last):
    File "<string>", line 1, in <module>
    File "/tmp/pip-build-env-m8axndlg/overlay/lib/python3.9/site-packages/numpy/__init__.py", line 140, in <module>
      from . import core
    File "/tmp/pip-build-env-m8axndlg/overlay/lib/python3.9/site-packages/numpy/core/__init__.py", line 48, in <module>
      raise ImportError(msg)
  ImportError:

  IMPORTANT: PLEASE READ THIS FOR ADVICE ON HOW TO SOLVE THIS ISSUE!

  Importing the numpy C-extensions failed. This error can happen for
  many reasons, often due to issues with your setup or how NumPy was
  installed.

  We have compiled some common reasons and troubleshooting tips at:

      https://numpy.org/devdocs/user/troubleshooting-importerror.html

  Please note and check the following:

    * The Python version is: Python3.9 from "/home/username/Desktop/MyApp/venv/bin/python"
    * The NumPy version is: "1.19.3"

  and make sure that they are the versions you expect.
  Please carefully study the documentation linked above for further help.

  Original error was: libcblas.so.3: cannot open shared object file: No such file or directory

  -- Looking for ccache - not found
 *** cut out ***
  -- General configuration for OpenCV 4.7.0 =====================================
  --   Version control:               unknown
  --
  --   Platform:
  --     Timestamp:                   2023-03-07T08:35:01Z
  --     Host:                        Linux 5.15.61-v7+ armv7l
  --     CMake:                       3.25.2
  --     CMake generator:             Unix Makefiles
  --     CMake build tool:            /usr/bin/gmake
  --     Configuration:               Release
  --
  --   CPU/HW features:
  --     Baseline:
  --       requested:                 DETECT
  --
  --   C/C++:
  --     Built as dynamic libs?:      NO
  --     C++ standard:                11
  --     C++ Compiler:                /usr/bin/c++  (ver 10.2.1)
  --     C++ flags (Release):         -fsigned-char -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Wno-psabi -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG  -DNDEBUG
  --     C++ flags (Debug):           -fsigned-char -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Wno-psabi -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -fvisibility=hidden -fvisibility-inlines-hidden -g  -O0 -DDEBUG -D_DEBUG
  --     C Compiler:                  /usr/bin/cc
  --     C flags (Release):           -fsigned-char -W -Wall -Wreturn-type -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Wno-psabi -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -fvisibility=hidden -O3 -DNDEBUG  -DNDEBUG
  --     C flags (Debug):             -fsigned-char -W -Wall -Wreturn-type -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Wno-psabi -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -fvisibility=hidden -g  -O0 -DDEBUG -D_DEBUG
  --     Linker flags (Release):      -Wl,--gc-sections -Wl,--as-needed -Wl,--no-undefined
  --     Linker flags (Debug):        -Wl,--gc-sections -Wl,--as-needed -Wl,--no-undefined
  --     ccache:                      NO
  --     Precompiled headers:         NO
  --     Extra dependencies:          /usr/lib/arm-linux-gnueabihf/libpng.so /usr/lib/arm-linux-gnueabihf/libz.so dl m pthread rt
  --     3rdparty dependencies:       libprotobuf ade ittnotify libjpeg-turbo libwebp libtiff libopenjp2 IlmImf quirc
  --
  --   OpenCV modules:
  --     To be built:                 calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo stitching video videoio
  --     Disabled:                    world
  --     Disabled by dependency:      -
  --     Unavailable:                 java python2 python3 ts
  --     Applications:                -
  --     Documentation:               NO
  --     Non-free algorithms:         NO
  --
  --   GUI:                           NONE
  --     GTK+:                        NO
  --     VTK support:                 NO
  --
  --   Media I/O:
  --     ZLib:                        /usr/lib/arm-linux-gnueabihf/libz.so (ver 1.2.11)
  --     JPEG:                        libjpeg-turbo (ver 2.1.3-62)
  --     WEBP:                        build (ver encoder: 0x020f)
  --     PNG:                         /usr/lib/arm-linux-gnueabihf/libpng.so (ver 1.6.37)
  --     TIFF:                        build (ver 42 - 4.2.0)
  --     JPEG 2000:                   build (ver 2.4.0)
  --     OpenEXR:                     build (ver 2.3.0)
  --     HDR:                         YES
  --     SUNRASTER:                   YES
  --     PXM:                         YES
  --     PFM:                         YES
  --
  --   Video I/O:
  --     DC1394:                      NO
  --     FFMPEG:                      NO
  --       avcodec:                   NO
  --       avformat:                  NO
  --       avutil:                    NO
  --       swscale:                   NO
  --       avresample:                NO
  --     GStreamer:                   NO
  --     v4l/v4l2:                    YES (linux/videodev2.h)
  --
  --   Parallel framework:            pthreads
  --
  --   Trace:                         YES (with Intel ITT)
  --
  --   Other third-party libraries:
  --     Lapack:                      NO
  --     Eigen:                       NO
  --     Custom HAL:                  NO
  --     Protobuf:                    build (3.19.1)
  --
  --   OpenCL:                        YES (no extra features)
  --     Include path:                /tmp/pip-install-6_x1lqim/opencv-python_5f225b8f191e4bdf9b9078bacd8de511/opencv/3rdparty/include/opencl/1.2
  --     Link libraries:              Dynamic load
  --
  --   Python 3:
  --     Interpreter:                 /home/username/Desktop/MyApp/venv/bin/python (ver 3.9.2)
  --     Libraries:                   NO
  --     numpy:                       NO (Python3 wrappers can not be generated)
  --     install path:                -
  --
  --   Python (for build):            /home/username/Desktop/MyApp/venv/bin/python
  --
  --   Java:
  --     ant:                         /bin/ant (ver 1.10.9)
  --     JNI:                         NO
  --     Java wrappers:               NO
  --     Java tests:                  NO
  --
  --   Install to:                    /tmp/pip-install-6_x1lqim/opencv-python_5f225b8f191e4bdf9b9078bacd8de511/_skbuild/linux-armv7l-3.9/cmake-install
  -- -----------------------------------------------------------------
  --
  -- Configuring done
  -- Generating done
  -- Build files have been written to: /tmp/pip-install-6_x1lqim/opencv-python_5f225b8f191e4bdf9b9078bacd8de511/_skbuild/linux-armv7l-3.9/cmake-build
  [  0%] Built target opencv_dnn_plugins

--- Cut out between 1 & 99% since comment is too longer otherwise ---

 [100%] Built target opencv_gapi
  Install the project...
  -- Install configuration: "Release"

 ****Cut out****

Copying files from CMake output
  Traceback (most recent call last):
    File "/home/username/Desktop/MyApp/venv/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
      main()
    File "/home/username/Desktop/MyApp/venv/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
      json_out['return_val'] = hook(**hook_input['kwargs'])
    File "/home/username/Desktop/MyApp/venv/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 251, in build_wheel
      return _build_backend().build_wheel(wheel_directory, config_settings,
    File "/tmp/pip-build-env-n0_0bzbu/overlay/lib/python3.9/site-packages/setuptools/build_meta.py", line 230, in build_wheel
      return self._build_with_temp_dir(['bdist_wheel'], '.whl',
    File "/tmp/pip-build-env-n0_0bzbu/overlay/lib/python3.9/site-packages/setuptools/build_meta.py", line 215, in _build_with_temp_dir
      self.run_setup()
    File "/tmp/pip-build-env-n0_0bzbu/overlay/lib/python3.9/site-packages/setuptools/build_meta.py", line 267, in run_setup
      super(_BuildMetaLegacyBackend,
    File "/tmp/pip-build-env-n0_0bzbu/overlay/lib/python3.9/site-packages/setuptools/build_meta.py", line 158, in run_setup
      exec(compile(code, __file__, 'exec'), locals())
    File "setup.py", line 512, in <module>
      main()
    File "setup.py", line 262, in main
      skbuild.setup(
    File "/tmp/pip-build-env-n0_0bzbu/overlay/lib/python3.9/site-packages/skbuild/setuptools_wrap.py", line 673, in setup
      _classify_installed_files(
    File "setup.py", line 398, in _classify_installed_files_override
      with open('%spython/cv2/config-%s.py'
  FileNotFoundError: [Errno 2] No such file or directory: '_skbuild/linux-armv7l-3.9/cmake-install/python/cv2/config-3.py'
  error: subprocess-exited-with-error

  × Building wheel for opencv-python (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> See above for output.

  note: This error originates from a subprocess, and is likely not a problem with pip.
  full command: /home/username/Desktop/MyApp/venv/bin/python /home/username/Desktop/MyApp/venv/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py build_wheel /tmp/tmpnv5v7b7u
  cwd: /tmp/pip-install-ohiu737z/opencv-python_cc146731452e41c0bfc732e69dc17b71
  Building wheel for opencv-python (pyproject.toml) ... error
  ERROR: Failed building wheel for opencv-python
Failed to build opencv-python
ERROR: Could not build wheels for opencv-python, which is required to install pyproject.toml-based projects

 

System

• Raspberry Pi Model 3B+
• Ubuntu v18.04
• Linux 5.15.61-v7+
• Architecture: Arm
• Python v3.9

What I've tried so far

• Upgrading entire Linux system
• Reinstalling Python
• Reinstalling pip
• Upgrading pip
• Setting version explicitly to v4.7.0.72 ( using == operator )
• Setting version explicitly to v4.7.0.68

[billni]

I had the same problem. Try it "sudo apt install python3-opencv"

[UncleBob125]

I had the same problem. Try it "sudo apt install python3-opencv"

Hi billni, thanks for your answer.

I've tried that as well, but that installs it globally and not in my virtual environment.
I need it to be in my virtual environment, since I want to package the application with all dependencies into single binary from that virtual environment.

[asmorkalov]

It looks like I was able to reproduce the issue with my Pi 3b. Will take a look if I can propose some workaround before the next release.

It looks like I was able to reproduce the issue with my Pi 3b. Will take a look if I can propose some workaround before the next release.

Cheers, much looking forward to this

[asmorkalov]

config-XXX.py is named differently depending on LIMITED_API option. https://github.com/opencv/opencv/blob/4.x/modules/python/common.cmake#L210
CI build enabled LIMITED_API by default and it works well.
You can add -DPYTHON3_LIMITED_API=ON to CMake options to work around the issue.
See https://github.com/opencv/opencv-python/blob/4.x/setup.py#L179 and https://github.com/opencv/opencv-python/blob/4.x/setup.py#L251

config-XXX.py is named differently depending on LIMITED_API option. https://github.com/opencv/opencv/blob/4.x/modules/python/common.cmake#L210
CI build enabled LIMITED_API by default and it works well.
You can add -DPYTHON3_LIMITED_API=ON to CMake options to work around the issue.
See https://github.com/opencv/opencv-python/blob/4.x/setup.py#L179 and https://github.com/opencv/opencv-python/blob/4.x/setup.py#L251

Thank you very much. So its simply pip3 install opencv-python -DPYTHON3_LIMITED_API=ON --verbose

Or is that completely wrong?

[asmorkalov]

Use environment variable CMAKE_ARGS to define extra CMake arguments.

[asmorkalov]

Fixed in #820

Fixed in #820

Its still coming up with the error?

I can see your little eyes looking! When you said fixed I presumed I would just run the install again and it should work?! A little more help is needed please, Alexander @asmorkalov :) I have spent weeks trying to get OpenCV working and every guide I have tried has failed! I don't see how it's so bloody hard to install?!

All I'm looking to do is run the NDVI script using my RPI 3B+ and NOIR V3 camera! I don't know if it helps but I could instal OpenCV on my Unraid server and have the feed from the Pi go there and the server does all the hard work. At the end of the day, my server is running Home Assistant in a VM but I need the Pi's NOIR camera with the blue filter over the lens.

[skvark]

Obviously, the new version that would include the bug fix hasn't been released to the Python package index since the fix was just merged into this repository. You'll have to wait for a new release, or clone this repository and do a manual build.

PHmm, I think I can clone this one and do it. Numpy, picamera and flask is already installed so will try cloning this and installing…Kind regards,JamieOn 17 Mar 2023, at 14:26, Olli-Pekka Heinisuo ***@***.***> wrote: Obviously, the new version that would include the bug fix hasn't been released to the Python package index since the fix was just merged into this repository. You'll have to wait for a new release, or clone this repository and do a manual build. —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you commented.Message ID: ***@***.***>

[UncleBob125]

Thanks for the fix @asmorkalov !
Is it correct this should now be available in the opencv-python-rolling deployment package?
I tried to install this by using "pip install opencv-python-rolling==4.7.0.20230318"
But it seems te version can't be found.
On piwheels.org it says the build is skipped? => https://piwheels.org/project/opencv-python-rolling/
Should I take a different approach?
Sorry if this is a dumb question, i'm pretty new to this.

Thanks in advance!