class_docstr: This class wraps data into a dict-like object
code: def __setitem__(self, key, value):
      assert type(value) == np.ndarray
      self.dict[key] = value
  
imports: from collections import defaultdict
  import csv
  from datetime import datetime
  import json
  from math import radians, cos, sin, asin, sqrt
  import urllib2
  import numpy
label_desc: Use image node_id 4 for calling the DataAccessObject obj's underlying member method code with example usage: obj.__setitem__(key, value) without return types