Extract nodeset coordinates in abaqus with python script

[Tarhouni]

Hello,

I would like to extract the Node set coordinates using a python script. i tried with this method using odb file :

import sys
from odbAccess import *
from abaqus import *
from abaqusConstants import *
import __main__

odb = openOdb('C:/Temp/Job-1.odb')
set = odb.rootAssembly.instances['part-1'].nodeSets['Set-1']
numNodes = len(set.nodes)
partlabel=[];
partxcord=[];
partycord=[];
partzcord=[];
for curNode in a.nodes:
partlabel.append(curNode.label)
partxcord.append(curNode.coordinates[0])
partycord.append(curNode.coordinates[1])
partzcord.append(curNode.coordinates[2])
The error displayed is : keyerror : Set-1.
knowing that when I defined the same syntax for the coordinates of the instance nodes, it works correctly.
myInstance = odb.rootAssembly.instances['part-1']