Installing igraph to use on FreeCAD

[Ryan Schmidt]

On Jul 3, 2015, at 1:34 PM, Floriane B wrote:

> Me again ! I'm trying to install iGraph to use on FreeCAD's python console. When asking the question on the dedicated forum, I got the following answer:
> 
> Open terminal and type.
> CODE: SELECT ALL
> port install py27-igraph
> or
> CODE: SELECT ALL
> sudo port install py27-igraph
> 
> I installed igraph using Macports, and it is now available for me to use on the default python interface of my computer, Python 2.7.5.
> However, when I try to import iGraph in the python console in FreeCAD (which has solely the same version), I got the following error: 
> 
> Traceback (most recent call last):
>   File "<input>", line 1, in <module>
> ImportError: No module named igraph
> 
> 
> So my question is : is it possible to use MacPorts to install iGraph, but to choose on which python console ? 
> The different versions are as follow.
> 
> In FreeCAD: 
> Python 2.7.5 (default, Jan 20 2014, 20:59:17) 
> [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
> 
> Default Python: 
> Python 2.7.5 (default, Mar  9 2014, 22:15:05) 
> [GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.0.68)] on darwin
> 
> Do you have any idea on how I could reach that goal ? 

If you installed py27-igraph using MacPorts, then you can only use py27-igraph when using MacPorts python27. In other words, the command you use to start your python script, or to start the python console, must be /opt/local/bin/python2.7. Using Apple's python included with OS X will not work because it does not know about modules installed with MacPorts.