Re: [igraph] Plot.show() on windows

[Júlio de Lima do Rêgo Monteiro]

Hi there Tamas,

Thanks for the quick reply!
After I applied the patch, fig.show() no longer generates an error, but 
also doesn't show any picture. Nothing happened.
I realized it was because the imageviewer application was not being 
executed properly.
So I changed the file configuration.py, changing the return value from 
the function  get_platform_image_viewer()
from "start" to " " in case of the Windows platform.

49:    elif plat == "Windows":
50:        # Use the built-in Windows image viewer, if available
51:        return " "   <---- here
52:    else:

Ant this solved it for me!
Thanks a lot for the help!
Julio

Tamas Nepusz wrote:
> Hi,
>
> > If I change fig.show() to fig.save("test.png") it works.
> >
> > Anyone has a clue on what could be the problem?
> Well, the igraph plotting facility has not been tested too much on 
> Windows ;) Since I mostly use OS X, I only tried it in a virtual 
> machine before release and it worked there.
>
> The only difference between fig.show() and fig.save(whatever) is that 
> the former one tries to create a temporary file somewhere, start the 
> Windows Picture and Fax Viewer to view it and then delete the 
> temporary file. It looks like igraph either incorrectly detects the 
> temporary directory where it tries to put the PNG file or you don't 
> have writing permission to that directory.
> After having received the IOError, you might try printing 
> fig._tmpfile_obj or fig._tmpfile_obj.name to figure out where did it 
> try to save the picture.
>
> On second thought, I remember having fixed a bug like this after the 
> release of igraph 0.5. Since 0.5.1 has not been released yet, you 
> might try modifying drawing.py in the igraph Python interface source 
> by hand. The patch is here:
>
> http://cneurocvs.rmki.kfki.hu/cgi-bin/archzoom.cgi/address@hidden/igraph--main--0.5--patch-394/interfaces/python/package/drawing.py.diff?diff 
>
>
> Lines that have to be removed are denoted by red, new lines that were 
> added are blue.
>
> Best,