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[Leonard <question704551@xxxxxxxxxxxxxxxxxxxxx>]

Question #704551 on Yade changed:
https://answers.launchpad.net/yade/+question/704551

    Status: Answered => Open

Leonard is still having a problem:
Hi Jan and Karol,

Thanks for your MWEs.

Because I use an old version of Yade (2018.02b), consequently executing the MWE gives error: ValueError: too many values to unpack[1]. Thereby, I need to adapt the MWE to my old verison.
 
I successfully adapted Karol's MWE:
# exporter.exportSpheres(ids='all',what=dict(rotation_method_1 = 'b.state.rot()',rotation_method_2 = '(b.state.refOri.conjugate()*b.state.ori).toRotationVector() '))
###### change to
exporter.exportSpheres(ids='all',what=[('rotation_method_1','b.state.rot()'),('rotation_method_2','(b.state.refOri.conjugate()*b.state.ori).toRotationVector()')])


But I didn't make it for Jan's MWE. What I tried is:
from yade import export
import builtins # to store "data" and access them from a string command

spheres = [
    sphere((0,0,0),1),
    sphere((3,0,0),1),
    sphere((6,0,0),1),
]
O.bodies.append(spheres)

data = [ # e.g. angle
    1,
    2,
    3,
]
builtins.data = data # make data "global", visible in export module

vtk = export.VTKExporter("test-angle")
# vtk.exportSpheres(what=dict(angle="data[b.id]"))  ## change it to
vtk.exportSpheres(ids='all',what=[('ids','b.id'),('pos','b.state.pos'),('angle','data[b.id]')])

It returns the following error:
Traceback (most recent call last):
  File "/usr/bin/yade", line 182, in runScript
    execfile(script,globals())
  File "Jan_MWE.py", line 22, in <module>
    vtk.exportSpheres(ids='all',what=[('ids','b.id'),('pos','b.state.pos'),('angle','data[b.id]')])
  File "/usr/lib/x86_64-linux-gnu/yade/py/yade/export.py", line 431, in exportSpheres
    test = eval(command) # ... eval one example to see what type (float, Vector3, Matrix3) the result is ...
  File "<string>", line 1, in <module>
NameError: name 'data' is not defined

Could you please give some instructions?

Thanks
Leonard


[1]https://answers.launchpad.net/yade/+question/695966

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