node deletion does not respect files that get passed through about nipype HOT 1 CLOSED

def fun1(a):
    return a + 10

fun1_inter = Function(input_names=["a"],
                      output_names=["fun1_out"],
                      function=fun1)

node_fun1 = Node(fun1_inter, name="fun1")

node_fun1.inputs.a = 4

def fun2(b):
    return 5 * b

fun2_inter = Function(input_names=["b"],
                      output_names=["fun2_out"],
                      function=fun2)

node_fun2 = Node(fun2_inter, name="fun2")


node_iden = Node(IdentityInterface(fields=['b']),
                  name="identity")


wf = Workflow(name="testing_workflow", base_dir="/output/testing")
wf.connect(node_fun1, "fun1_out", node_iden, "b")
wf.connect(node_iden, "b", node_fun2, "b")

res = wf.run()

print(list(res.nodes())[1].result.outputs)