class_docstr: Tests for ops in byteps.mxnet.
code: def _current_context(self):
      if has_gpu:
          return mx.gpu(bps.local_rank())
      else:
          return mx.current_context()
  
file_path: byteps/tests/test_mxnet.py
imports: import itertools
  import unittest
  import byteps.mxnet
  import mxnet
  import numpy
  from meta_test import MetaTest
label_desc: Use image node_id 1 for calling the MXTest obj's underlying member method code with example usage: obj._current_context() and returns: mx, mx