code: def _get_op_kw(self):
      kw = dict()
      kw["ddof"] = self.ddof
      return kw
  
imports: import numpy
  from ...None import opcodes
  from ...serialization.serializables import Int32Field
  from ..datasource import tensor
  from ..array_utils import device, as_same_device, get_array_module
  from .var import reduce_var_square
  from .core import TensorReduction, TensorReductionMixin, nannumel
label_desc: Use image node_id 4 for calling the TensorNanVar obj's underlying member method code with example usage: obj._get_op_kw() and returns: kw