class_docstr: Base wrapper class.
class_docstr_tok: ["Base","wrapper","class","."]
docstr: Access the variable holding the current observation.
docstr_tok: ["Access","the","variable","holding","the","current","observation","."]
code: def observ(self):
      """Access the variable holding the current observation."""
      return self._observ.read_value()
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from six.moves import range
  from tensor2tensor.rl.envs.in_graph_batch_env import InGraphBatchEnv
  import tensorflow.compat.v1
label_desc: Use image node_id 3 for calling the WrapperBase obj's underlying member method code with example usage: obj.observ() and returns: self