Opencv-python: installation on Ubuntu ppc64le

[Borda]

Expected behaviour

I want to install this package on Ubuntu ppc64le architecture but it constantly tells me that there is no available version... I have used docker image and compiled OpenCV from source, similar as it is here which succeed but then installing opencv-python fails...

Actual behaviour

Collecting pip
  Using cached https://files.pythonhosted.org/packages/30/db/9e38760b32e3e7f40cce46dd5fb107b8c73840df38f0046d8e6514e675a1/pip-19.2.3-py2.py3-none-any.whl
Installing collected packages: pip
  Found existing installation: pip 19.2.3
    Uninstalling pip-19.2.3:
      Successfully uninstalled pip-19.2.3
Successfully installed pip-19.2.3

$ pip install opencv-python
Collecting opencv-python
  ERROR: Could not find a version that satisfies the requirement opencv-python (from versions: none)
ERROR: No matching distribution found for opencv-python

Steps to reproduce

• docker source: https://hub.docker.com/r/nvidia/cuda-ppc64le
• operating system: FROM nvidia/cuda-ppc64le:10.0-runtime-ubuntu18.04
• architecture: ppc64le
• opencv-python version - last

[skvark]

There are no builds for your architecture. If you compile OpenCV manually (like you have done), then opencv-python is obsolete. This repository just provides an automatic toolchain for Python to compile OpenCV Python bindings and generates pre-built packages for some popular architectures and uploads them to PyPI (see https://pypi.org/project/opencv-python/#files, no ppc64le wheel there -> pip complains about missing distribution).

However, if you wish to have opencv-python wheel package for your architecture, then you must execute following commands:

git clone https://github.com/skvark/opencv-python
cd opencv-python
python setup.py bdist_wheel (this will take 10+ minutes)
cd dist
pip install generated_wheel_package.whl

If you do this, do not compile OpenCV manually. The above steps already did that.

[Borda]

Well I have tried also following with the same failer...
pip install https://github.com/skvark/opencv-python/archive/master.zip
Which should do the build too, right?

[Borda]

Btw, having compiled openCV manually and installing opencv-python from pip uses my custom build or does it creates another copy (binaries/compilation)?

[skvark]

Well I have tried also following with the same failer...
pip install https://github.com/skvark/opencv-python/archive/master.zip
Which should do the build too, right?

The setup.py logic currently assumes that it's run inside a directory which is a Git repository (because setup.py clones opencv and opencv_contrib submodules) so that command will fail. I'll try to publish a source tarball in the next release which means that pip install opencv-python will fall back to manual build if a compatible pre-built wheel is not found from PyPI.

Btw, having compiled openCV manually and installing opencv-python from pip uses my custom build or does it creates another copy (binaries/compilation)?

This repository has nothing to do with your custom build. In fact, the first step in the README says that you must remove other manually installed OpenCV python binding versions if you wish to use opencv-python. opencv-python uses its own copy of OpenCV.

You either use opencv-python OR you compile OpenCV manually and install it manually to your Python environment. You can't use both simultaneously because they are two different packages.