passing pythonic outputs in nipype

test.py

from nipype import Workflow, Node, Function

def myrandomfunc(N):
    import numpy as np
    return np.random.random_integers(1, 10, N)

def  mysumfunc(X):
    return X.sum()


wf = Workflow(name='test')
node1 = Node(Function(input_names='N', output_names='out', function=myrandomfunc),
             name='randomgenerator')
node2 = Node(Function(input_names='X', output_names='out', function=mysumfunc),
             name='add')
wf.connect(node1, 'out', node2, 'X')

node1.inputs.N = 10

eg = wf.run()