utils.getStressAndTangent()

from your website, i can see there is a command called utlis.getStressAndTangent() which can give a macroscopic Tangent. However, the program with such command has error:

AttributeError: 'module' object has no attribute 'getStressAndTangent'

Yade on my computer is 1.07.0, i am wondering it is the version problem.

And also, if it is the version problem, how can i update the Yade version, for i have input " sudo apt-get install yade" in terminal and it says the version is the newest.

You can use such codes to test what i met:
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#!/usr/bin/python # This is server.py file

import string
from yade import plot,qt
from yade.pack import *
from yade import pack, plot
import socket # Import socket module
import numpy # initial the math of matrix compute (needed in ns)

# initial the global variables
arrcc =[0]*3 # last step strain(commit)
arrtt =[0]*3 # last step strain(trail)
scc=[0]*3 # last step stress
orst=1 # initialize the orginal save document(trial)
check=[0]*1 # I need to calculate the first step when ag=0
check[0]=0
theTangent=(0)
# load the identical package
O.load('/tmp/cccc.gz') # only load the package, because the O.cell.velGrad is not compatible with the peri3dcontroller eigine

#O.periodic=True ### note!!! add
O.dt=1e-8

# see the example of peri3dcontroller, 1.5 is used to speed up the computation
EnlargeFactor=1.5
EnlargeFactor=1.0
O.engines=[
 ForceResetter(),
 InsertionSortCollider([Bo1_Sphere_Aabb(aabbEnlargeFactor=EnlargeFactor,label='bo1s')]),
 InteractionLoop(
  [Ig2_Sphere_Sphere_ScGeom(interactionDetectionFactor=EnlargeFactor,label='ig2ss')],
  [Ip2_CpmMat_CpmMat_CpmPhys()],[Law2_ScGeom_CpmPhys_Cpm()]),
 NewtonIntegrator(),
 #VTKRecorder(fileName='3dfirst-vtk-',recorders=['all','cpm'],iterPeriod=4999),

]

O.cell.velGrad=utils.Matrix3(0,0,0,0,0,0,0,0,0)
O.step()
bo1s.aabbEnlargeFactor=ig2ss.interactionDetectionFactor=1. # O.step and change 1.5 back to 1. , because the concrete model is developed in the 1. environment

if orst==1:
 print "orst1"

 for b in O.bodies:
  b.material.young = 1.0001*17e10

 orst=2
 ag = [0]*3 # current - last ie. the changed strain
 ag[0] = 0
 ag[1]= 0
  ag[2] =0
 ns=100
 dstrain = utils.Matrix3(ag[0],ag[2],0,0,ag[1],0,0,0,0) # the goal strain xx xy xz, yx yy yz, zx zy zz
 O.cell.velGrad=dstrain/(ns*O.dt)
 O.run(ns,True)
 stressValue=utils.getStress()
 stressxx=stressValue[0,0] # the return stress xx
 stressyy=stressValue[1,1] # the return stress yy
 stressxy=(stressValue[0,1]+stressValue[1,0])/2 # the return stress xy = (xy + yx)/2

 print "stress here from strain[0,0,0] step 1"
 print stressxx
 print stressyy
 print stressxy

 theTangent=utils.getStressAndTangent()
 print theTangent
 O.saveTmp('first')

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Thanks a lot!