Cannot install on Python 2.7.9 (x64) + Windows 7 x64 about openslide-python

[bgilbert]

It's a compiler toolchain problem of some sort. Python on Windows is compiled with Microsoft's compiler, and while distutils contains various hacks to permit building extension modules with MinGW, they aren't perfect. A Google search found some other people getting the same errors with other extension modules, but I didn't immediately find a reliable-looking solution to your problem. You may have better luck.

If you can't get the build working, you could install OpenSlide Python with python setup.py install --without-performance to skip the extension module.

[nashv]

Thank you for your comments Benjamin. It is very unfortunate. I suppose that is the reason Christopher Gohlke supplies pre-compiled package installers for Windows.
Is it possible to do the same with Openslide-Python?

Microsoft's compiler is also present on the system, but for reasons unknown distutils is choosing to use MingGW.
Incidently, openslide-python installed without errors on the same machine in Python 3. So I can use it. But now I am unsure if openslide-python on Python 3 did the performance improvements or not.

[bgilbert]

You can configure distutils to use a particular compiler. If import openslide._convert works for you on Python 3, the performance improvements are available.

Given the difficulty of building extension modules on Windows, perhaps we should indeed provide binary packages. I will investigate whether that is practical.

[bgilbert]

I now have an AppVeyor project to build Python wheels for Windows, so we'll be providing those from now on. I've uploaded wheels for OpenSlide Python 1.1.0 to GitHub and PyPI. pip install should automatically pick them up. Thanks for the report.

[Vozf]

Have the same error when trying to install another repo as a dependency with setup.py which contains openslide-python in install_requires

[bgilbert]

@Vozf Are you installing using pip? What platform and what version of Python do you have?