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pip install build issue #825

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@DrBwts

Description

@DrBwts

Expected behaviour

I expected OpenCV's python API to install. I have used the same proceedure in numerous conda environments & have never had a problem like this. In fact it worked just fine yesterday in a different conda env

Actual behaviour

pip installer threw pages & pages of errors, c&p below

Steps to reproduce

As admin,
conda activate genicam

Then any of the following,

pip install opencv-contrib-python
pip install opencv-contrib-python --user
pip install opencv-python
pip install opencv-python --user

They all give the same pages & pages of errors

  • operating system - Win 10
  • architecture (e.g. x86) - x64
  • opencv-python version - 4.7.0.72

I would post the errors but "There was an error creating your Issue: body is too long (maximum is 65536 characters). "

So some highlights,

ERROR: Command errored out with exit status 1:
   command: 'C:\ProgramData\Anaconda3\envs\genicam\python.exe' 'C:\ProgramData\Anaconda3\envs\genicam\lib\site-packages\pip\_vendor\pep517\in_process\_in_process.py' build_wheel 'C:\Users\NICBWT~1\AppData\Local\Temp\tmp98_vz8u5'
       cwd: C:\Users\NICBWT~1\AppData\Local\Temp\pip-install-71z9rl7t\opencv-contrib-python_387a51900d48422f8ed4ed222402118d
  Complete output (1205 lines):


  --------------------------------------------------------------------------------
  -- Trying 'Ninja (Visual Studio 17 2022 x64 v143)' generator
  --------------------------------
  ---------------------------
  ----------------------
  -----------------
  ------------
  -------
  --
  Not searching for unused variables given on the command line.
  CMake Error at CMakeLists.txt:2 (PROJECT):
    Generator

      Ninja

    does not support platform specification, but platform

      x64

    was specified.

The LOADS of stuff ending with...

ERROR: Could not build wheels for opencv-contrib-python, which is required to install pyproject.toml-based projects

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