code: def val(self):
      return self._val
  
imports: import numpy
  from ...None import opcodes
  from ...core import ENTITY_TYPE, recursive_tile
  from ...serialization.serializables import KeyField, AnyField, BoolField, Int32Field
  from ...utils import has_unknown_shape, ceildiv
  from ..operands import TensorOperand, TensorOperandMixin
  from ..datasource import tensor
  from ..array_utils import as_same_device, device
  from ..core import Tensor, TENSOR_TYPE
  from ..utils import decide_unify_split
label_desc: Use image node_id 3 for calling the TensorFillDiagonal obj's underlying member method code with example usage: obj.val() and returns: self