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

[Tamas Nepusz]

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,
--
Tamas