Bug 1008392

Created attachment 798198 [details]
File: backtrace

Created attachment 798199 [details]
File: environ

Try installing wxPython.  The problem seems to be that Mayavi doesn't work well with the pyface Qt backend.  I hope to have some updates out soon to fix this, but installing wxPython should do the trick.

Installing wxPython fixed the problem. Thanks!
Maybe wxPython should be added to the dependency list?

python-pyface-4.3.0-4.fc19, Mayavi-4.3.0-6.fc19 has been submitted as an update for Fedora 19.
https://admin.fedoraproject.org/updates/python-pyface-4.3.0-4.fc19,Mayavi-4.3.0-6.fc19

To test this I need python-pyface-wx and python-pyface-qt (as is stated). 

Additionally, when I run a script like this: 
#!/usr/bin/env python
import sys 
import numpy as np
fname=sys.argv[1]
x,y,z,nnn=np.loadtxt(fname,delimiter=';',usecols=(1,2,3,4),unpack=True)
from mayavi import mlab
mlab.options.offscreen=True
mlab.figure(1,fgcolor=(0,0,0),bgcolor=(1,1,1),size=(1280,1024))
pts=mlab.points3d(x,y,z,nnn,scale_mode='none',scale_factor=0.0,colormap='jet',vmin=3.0,vmax=8.0)
mesh=mlab.pipeline.delaunay2d(pts)
mlab.pipeline.surface(mesh,representation='wireframe',line_width=1.333,colormap='jet',vmin=3.0,vmax=8.0)
mlab.view(elevation=30,azimuth=-90)
mlab.savefig('dl-'+fname.rsplit(".",1)[0]+'.png')

I obtain this error:
QWidget: Must construct a QApplication before a QPaintDevice
Aborted (core dumped)

(maybe this helps https://mail.enthought.com/pipermail/enthought-dev/2012-March/030750.html )

Is this related to this bug or should I file a new one?

Package python-pyface-4.3.0-4.fc19, Mayavi-4.3.0-6.fc19:
* should fix your issue,
* was pushed to the Fedora 19 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing python-pyface-4.3.0-4.fc19 Mayavi-4.3.0-6.fc19'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2013-17000/python-pyface-4.3.0-4.fc19,Mayavi-4.3.0-6.fc19
then log in and leave karma (feedback).

I think that is a separate issue.  pyface is loading the wx toolkit as expected, but something else is going awry.

Looks like this fixes it: https://github.com/enthought/mayavi/pull/64/files

Try that and let me know if you run into any other problems.

Everything seems to work for now :) 

I updated to the newer version and added the fix in "https://github.com/enthought/mayavi/pull/64/files" and that seems to work like charm.

Much obliged.

Package python-pyface-4.3.0-4.fc19, Mayavi-4.3.0-7.fc19:
* should fix your issue,
* was pushed to the Fedora 19 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing python-pyface-4.3.0-4.fc19 Mayavi-4.3.0-7.fc19'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2013-17000/python-pyface-4.3.0-4.fc19,Mayavi-4.3.0-7.fc19
then log in and leave karma (feedback).

python-pyface-4.3.0-4.fc19, Mayavi-4.3.0-7.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

I've still have the same problem with:

Python 2.7.5 (default, Oct  8 2013, 12:19:40) 
[GCC 4.8.1 20130603 (Red Hat 4.8.1-1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from mayavi import mlab
QWidget: Must construct a QApplication before a QPaintDevice
Aborted (core dumped)

Linux 3.11.4-201.fc19.x86_64


(In reply to Benny from comment #6)
> To test this I need python-pyface-wx and python-pyface-qt (as is stated). 
> 
> Additionally, when I run a script like this: 
> #!/usr/bin/env python
> import sys 
> import numpy as np
> fname=sys.argv[1]
> x,y,z,nnn=np.loadtxt(fname,delimiter=';',usecols=(1,2,3,4),unpack=True)
> from mayavi import mlab
> mlab.options.offscreen=True
> mlab.figure(1,fgcolor=(0,0,0),bgcolor=(1,1,1),size=(1280,1024))
> pts=mlab.points3d(x,y,z,nnn,scale_mode='none',scale_factor=0.0,
> colormap='jet',vmin=3.0,vmax=8.0)
> mesh=mlab.pipeline.delaunay2d(pts)
> mlab.pipeline.surface(mesh,representation='wireframe',line_width=1.333,
> colormap='jet',vmin=3.0,vmax=8.0)
> mlab.view(elevation=30,azimuth=-90)
> mlab.savefig('dl-'+fname.rsplit(".",1)[0]+'.png')
> 
> I obtain this error:
> QWidget: Must construct a QApplication before a QPaintDevice
> Aborted (core dumped)
> 
> (maybe this helps
> https://mail.enthought.com/pipermail/enthought-dev/2012-March/030750.html )
> 
> Is this related to this bug or should I file a new one?

(In reply to Andre F. from comment #12)
> I've still have the same problem with:
> 
> Python 2.7.5 (default, Oct  8 2013, 12:19:40) 
> [GCC 4.8.1 20130603 (Red Hat 4.8.1-1)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> from mayavi import mlab
> QWidget: Must construct a QApplication before a QPaintDevice
> Aborted (core dumped)

What version of Mayavi and python-pyface do you have?

There it goes.

[andre@dell1555fedora ~]$ rpm -q python-pyface
python-pyface-4.3.0-4.fc19.noarch
[andre@dell1555fedora ~]$ rpm -q Mayavi
Mayavi-4.3.0-7.fc19.x86_64

Any more info needed?

Forget what about my bug, I had another installation of mayavi in my site-packages mayavi-4.3.0-py2.7-linux-x86_64.egg .... Really sorry I mixed easy_install with yum install. Just removed it everything working fine.