code: def __str__(self):
      return str(cuda.from_device(self.data, self.shape, self.dtype))
  
imports: import pycuda.driver
  import pycuda.autoinit
  import numpy
  import struct
  from pycuda.compiler import SourceModule
label_desc: Use image node_id 2 for calling the DoubleOpStruct obj's underlying member method code with example usage: obj.__str__() and returns: str