import clr
# Adding the DynamoRevitDS.dll module to work with the Dynamo API
clr.AddReference('DynamoRevitDS')
import Dynamo 

# access to the current Dynamo instance and workspace
dynamoRevit = Dynamo.Applications.DynamoRevit()
currentWorkspace = dynamoRevit.RevitDynamoModel.CurrentWorkspace

nodeNames = []

for i in currentWorkspace.Nodes:
    nodeNames.append(i.Name)

OUT = nodeNames