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[Christian Jakob <question186384@xxxxxxxxxxxxxxxxxxxxx>]

New question #186384 on Yade:
https://answers.launchpad.net/yade/+question/186384

Hello,

I am facing some troubles with a function:

def get_z_o_and_z_u():
	rad_sum = 0.0
	he_real = 0.0
	for ii in sphID:
		rad_sum = rad_sum + O.bodies[ii].shape.radius
		bh = O.bodies[ii].state.pos[2]
		if bh > he_real:
			he_real = bh
			he_eff = he_real + O.bodies[ii].shape.radius

	r_d = rad_sum/sum_spheres
	# determine clump dimensions:
	z_o = he_eff
	z_u = z_o-6*r_d

where sphID is the list of all sphere IDs. 

Error message:
  File "/home/me/YADE/YADE2989/bin/yade-bzr2989", line 183, in runScript execfile(script,globals()) 
  File "4-simulate-depth.py", line 11, in <module> get_z_o_and_z_u()
  File "userinput.py", line 134, in get_z_o_and_z_u
    rad_sum = rad_sum + O.bodies[ii].shape.radius 
AttributeError: 'NoneType' object has no attribute 'shape' 

I am wondering, because this function works (no Error message):

def updSph(rad=1.0):
	i = 0
	for ii in sphID:
		tempID = O.bodies.append(utils.sphere([O.bodies[ii].state.pos[0],O.bodies[ii].state.pos[1],O.bodies[ii].state.pos[2]], material=O.bodies[ii].material.id, radius=O.bodies[ii].shape.radius*rad, wire=False, highlight=False))
		sphID[i] = tempID
		O.bodies.erase(ii)
		i+=1

Does anyone know why this happens?

Thanks,

Christian

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