code: def to_chunk_op(self, *args):
      op = self.copy().reset_key()
      (k,) = args
      op._k = k
      return op
  
imports: import itertools
  import numpy
  from ...None import opcodes
  from ...serialization.serializables import KeyField, Int32Field
  from ...utils import has_unknown_shape
  from ..core import TENSOR_TYPE
  from ...lib.sparse import diag
  from ...lib.sparse.core import issparse, get_array_module, get_sparse_module
  from ...lib import sparse
  from ..core import TensorOrder
  from ..array_utils import create_array
  from .core import TensorHasInput
  from .zeros import TensorZeros
  from .array import tensor
label_desc: Use image node_id 1 for calling the TensorDiagBase obj's underlying member method code with example usage: obj.to_chunk_op() and returns: op