code: def init_kv(name="device"):
      return mx.kv.create(name)
  
file_path: mxnet/tests/python/unittest/test_kvstore_custom.py
imports: import mxnet
  import numpy
  import unittest
  from mxnet.test_utils import rand_ndarray, assert_almost_equal
  from common import assertRaises
  from mxnet.base import py_str, MXNetError
label_desc: Use image node_id 2 for calling a global function with example usage: init_kv(name) and returns: mx