Install difficulties - No module named _hough_transform

[Josh Warner]

Hi James, 

These are Cython modules that aren't being found or are not properly compiling. Please let us know what version of Cython you are running. 

Rest assured the modules are there. These are not external dependencies. I suspect an old version of Cython is to blame.


Regards,



On Saturday, February 14, 2015 at 7:35:31 AM UTC-7, james.a.f... at googlemail.com wrote:
> Hi,
> 
> 
> I'm trying to install skimage, and having installed the dependencies (from requirements.txt in the source release), and then using pip to install skimage itself, I am having problems importing the transform library:
> 
> 
> 
> Python 2.7.2 (default, Oct 11 2012, 20:14:37) 
> [GCC 4.2.1 Compatible Apple Clang 4.0 (tags/Apple/clang-418.0.60)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import skimage.data
> >>> import skimage.transform
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "skimage/transform/__init__.py", line 1, in <module>
>     from ._hough_transform import (hough_ellipse, hough_line,
> ImportError: No module named _hough_transform
> 
> 
> This is on Mac OSX 10.8.4 with Python 2.7.2.  Is this an external library that needs installing from somewhere else?  I have already had to install tifffile separately to get skimage.data working (perhaps should be added to requirements.txt?).  I've tried a variety of approaches, but haven't had any success.
> 
> 
> Any and all advice welcome!
> 
> 
> Yours,
> James.