code: def input(self):
      return self._input
  
file_path: mars/mars/tensor/base/core.py
imports: from ...serialization.serializables import KeyField
  from ..operands import TensorOperand, TensorOperandMixin
label_desc: Use image node_id 1 for calling the TensorDeviceConversionBase obj's underlying member method code with example usage: obj.input() and returns: self