code: def testBroadcast(self):
      self._Test(_NcclBroadcast, lambda x, y: x)
  
imports: from functools import partial
  import numpy
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gradients
  from tensorflow.python.ops import nccl_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the BroadcastTest obj's underlying member method code with example usage: obj.testBroadcast() without return types