[scikit-image] Compilation Problems

[Stefan van der Walt]

Hi James

Please try:

pip uninstall cython
pip install cython

Thanks
Stéfan

On Tue, Jan 17, 2017, at 10:39, James Board via scikit-image wrote:
> I also tried to install scikit-image another way.  And got errors:
> 
> > pip install scikit-image --user
> 
>     Complete output from command /usr/local/python/2.7.9/gnu/bin/python
>     -u -c "import setuptools,
>     tokenize;__file__='/p/work2/workspace/guest/pip-build-L2pBBW/subprocess32/setup.py';
>         exec(compile(getattr(tokenize, 'open',
>         open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))"
>         install --record
>         /workspace/guest/pip-_PsWy1-record/install-record.txt
>         --single-version-externally-managed --compile --user --prefix=:
>     running install
>     running build
>     running build_py
>     creating build
>     creating build/lib.linux-x86_64-2.7
>     copying subprocess32.py -> build/lib.linux-x86_64-2.7
>     running build_ext
>     failed to import Cython:
>     /usr/local/python/2.7.9/gnu/lib/python2.7/site-packages/Cython-0.23.4-py2.7-linux-x86_64.egg/Cython/Compiler/Scanning.so:
>     undefined symbol: PyUnicodeUCS4_DecodeUTF8
>     error: Cython does not appear to be installed
> 
>     ----------------------------------------
> Command "/usr/local/python/2.7.9/gnu/bin/python -u -c "import setuptools,
> tokenize;__file__='/p/work2/workspace/guest/pip-build-L2pBBW/subprocess32/setup.py';
>     exec(compile(getattr(tokenize, 'open',
>     open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))"
>     install
>     --record /workspace/guest/pip-_PsWy1-record/install-record.txt
>     --single-version-externally-managed --compile --user --prefix="
>     failed with error code 1 in
>     /p/work2/workspace/guest/pip-build-L2pBBW/subprocess32/
> You are using pip version 8.1.0, however version 9.0.1 is available.
> You should consider upgrading via the 'pip install --upgrade pip'
> command.
> 
> 
> 
> So, it complains about cython.  But cython is already installed:
> 
> 
> 
> > pip install cython --user
> Requirement already satisfied (use --upgrade to upgrade): cython in
> /p/home/usr/local/python/2.7.9/gnu/lib/python2.7/site-packages/Cython-0.23.4-py2.7-linux-x86_64.egg
> 
> 
> I'm not sure what to do next.