code: def __init__(self, dataset):
      self.dataset = dataset
  
imports: import sys
  import warnings
  import numpy
  import param
  from ..None import util
  from ..element import Element
  from ..ndmapping import NdMapping
  from .util import finite_range
label_desc: Use image node_id 1 to create a new Accessor object  with example: obj = Accessor(dataset)