class_docstr: Operand represents scalar type.
code: def data(self):
      return self._data
  
file_path: mars/mars/tensor/datasource/scalar.py
imports: import numpy
  from ...None import opcodes
  from ...serialization.serializables import AnyField
  from .core import TensorNoInput
  from ..array_utils import create_array
label_desc: Use image node_id 3 for calling the Scalar obj's underlying member method code with example usage: obj.data() and returns: self