I tried the follwing code and tried to read eseden from a nodeset. I get the following error as "Type error Field output object is not iterable".
Aravind
from odbAccess import *
from textRepr import *
from abaqusConstants import *
import odbAccess
odb=openOdb(path='python2d.odb')
NodesofInterest = odb.rootAssembly.instances['PART-1-1'].nodeSets['NODESET']
eseden=odb.steps['Step-1'].frames[1].fieldOutputs['ESEDEN'].getSubset(region=NodesofInterest)
for v in eseden:
print v
print (v.elementLabel,v.data)