Regarding pizza post processing

mksingh's picture
Submitted by mksingh on Mon, 08/30/2010 - 11:51

Hi,
When I try to import VTK format data using pizza.py, I get following error:
==================================================================
> d=("dump.cohesion")
> v=vtk(d)
> v.manyGran()
Traceback (most recent call last):
File "", line 1, in
File "/home/mksingh/Projects/GRANULAR/DEM/PIZZA/gran_pizza_17Aug10/src/vtk.py", line 158, in manyGran
which,time,flag = self.data.iterator(flag)
AttributeError: 'str' object has no attribute 'iterator'
===================================================
I do not know how to resolve this issue.
With best regards.
M K Singh

Forums:

ckloss's picture

ckloss | Mon, 08/30/2010 - 12:09

Hi MK,

hard to say without further information. Are you using the most current versions of both LIGGGHTS and pizza?
What comes up immediately after you type 'pizza' in the terminal - are there any errors/warnings?

Best regards,
Christoph

mksingh's picture

mksingh | Mon, 08/30/2010 - 13:15

Hi Christoph,
When I type pizza, I get the following:
pizza
==============================================================
Pizza.py (1 Oct 2006), a toolkit written in Python
type ? for help, CTRL-D to quit
Loading tools ...
Display not available ... no GUIs
animate tool did not load:
No module named _tkinter
plotview tool did not load:
No module named _tkinter
gl tool did not load:
No module named OpenGL.Tk
vcr tool did not load:
No module named _tkinter
mdump tool did not load:
No module named Numeric
image tool did not load:
No module named _tkinter
dump tool did not load:
No module named Numeric
>
============================================================
Indeed I use your gran_pizza_17Aug10 version. I hope I am not making error here.
Thanks in advance.
With best regards.
M K

With best regards,
Dr. Mrityunjay Kumar Singh,
Head, Process Modelling and visualization,
Tata Steel Limited, India

ckloss's picture

ckloss | Mon, 08/30/2010 - 13:19

>>Indeed I use your gran_pizza_17Aug10 version. I hope I am not making error here.
Well, I think you are doing nothing wrong. But you need either Numeric or numpy Python packages, it seems that your system is missing it. I'm not 100% sure if this will resolve it, but try installing numpy - see here for more info

Best regards,
Christoph

jeen1 | Mon, 09/19/2011 - 19:18

Hi, I installed numpy, and run numpy examples on python without problem. But still can't go pass d=dump.

I also download the newest gran_pizza version, still has the same problem reading dump file, with
d=dump(dump.***)
Error: Class dump has no attribute ***.

I browsed through the posts, this seems common, but all appear have been solved.

Share experience? Much appreciated.

msbentley's picture

msbentley | Tue, 09/20/2011 - 09:13

Could you post exactly what you're typing into pizza - your example above

d=("dump.cohesion")

is not a valid pizza command. To load a dump file (e.g. dump.cohesion) you use:

d=dump("dump.cohesion")

This should load in all of the data into python, where you can process it as you need, or dump to vtk files with something like:

vtk(d).manyGran("cohesion")

which will convert all timesteps in the dump file into VTK files with the prefix cohesion - you can then load these into ParaView, for example.

Regards, Mark

jeen1 | Mon, 09/19/2011 - 22:59

I installed both numpy and Numeric.

But d=dump(dump.**) does not work
d=dump("dump.**") does work and displayed snapshots data on screen.

Thanks.