code: def test_bcast_cpu(param):
      communicator = get_communicator(False)
  
      with chainer.using_config("dtype", param.dtype):
          x = chainer.Variable(
              numpy.random.normal(size=(100, 100)).astype(param.dtype)
          )
          check_bcast(x, communicator)
  
imports: import chainer
  import chainer.testing
  import chainer.testing.attr
  import numpy
  import pytest
  import chainermn
  import chainermn.functions
label_desc: Use image node_id 9 for calling a global function with example usage: test_bcast_cpu(param) without return types