class_docstr: Generate fake data of given shapes
class_docstr_tok: ["Generate","fake","data","of","given","shapes"]
code: def __len__(self):
      return self._size
  
imports: import copy
  import numpy
  import six
  from .base import DataFlow, RNGDataFlow
label_desc: Use image node_id 2 for calling the FakeData obj's underlying member method code with example usage: obj.__len__() and returns: self