I'm sorry if i'll probably repeat the same stuff but i've encountered a different error executing this piece of code.


from OpenBayes import learning
from copy import deepcopy
from time import time
import random

from one import *


N = 2000
# sample the network N times
cases = G.Sample(N) # cases = [{'c':0,'s':1,'r':0,'w':1},{...},...]
# delete some observations
for i in range(500):
case = cases[3*i]
rand = random.sample(['c','s','r','w'],1)[0]
case[rand] = '?'
for i in range(50):
case = cases[3*i]
rand = random.sample(['c','s','r','w'],1)[0]
case[rand] = '?'

# copy the BN
G2 = deepcopy(G)
# set all parameters to 1s
G2.InitDistributions()

# Learn the parameters from the set of cases
engine = learning.EMLearningEngine(G2)
# cases = engine.ReadFile('file.xls') #To use the data of file.xls
t = time()
engine.EMLearning(cases, 10)
print 'Learned from %d cases in %1.3f secs' %(N,(time()-t))

# print the learned parameters
for v in G2.all_v:
print v.name, v.distribution.cpt,'\n'


engine.SaveInFile('test.txt',G2,engine.BNet,engine)
###########################################################################


the error is
EM iteration: 1
Traceback (most recent call last):
File "../../tutorial/four.py", line 31, in ?
engine.EMLearning(cases, 10)
File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/OpenBayes/learning.py", line 58, in EMLearning
while self.hasntConverged(old, new, precision) and iter < max_iter:
File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/OpenBayes/learning.py", line 182, in hasntConverged
return not na.alltrue([na.allclose(v.distribution, new.v[v.name].distribution, atol=precision) for v in old.v.values()])
File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/numarray/numarraycore.py", line 1518, in allclose
x, y = asarray(array1), asarray(array2)
File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/numarray/numarraycore.py", line 434, in asarray
return array(seq, type=type, typecode=typecode, copy=0, dtype=dtype)
File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/numarray/numarraycore.py", line 425, in array
return fromlist(sequence,type,shape)
File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/numarray/numarraycore.py", line 248, in fromlist
if not len(seq) and type is None:
TypeError: len() of unsized object






i've installed the last version (0.1.0) from here http://svn.berlios.de/wsvn/pybayes/branches/Public/dist/OpenBayes-0.1.0.tar.gz?op=file&rev=143&sc=1


Am i wrong with something?
Francesco

I am having issues as well. Sadly, it seems that this project is dead.