code: def create_simple_link():
      link = chainer.Link()
      with link.init_scope():
          link.param = chainer.Parameter(np.zeros(1))
      return link
  
imports: import os
  import tempfile
  import unittest
  import chainer
  import numpy
  import chainerrl
label_desc: Use image node_id 1 for calling a global function with example usage: create_simple_link() and returns: link