class_docstr: Implements a python interface to interact with the SC2 binary.
  
  All of these are implemented as blocking calls, so wait for the response
  before returning.
  
  Many of these functions take a Request* object and respond with the
  corresponding Response* object as returned from SC2. The simpler functions
  take a value and construct the Request itself, or return something more useful
  than a Response* object.
docstr: Get a current observation.
docstr_tok: ["Get","a","current","observation","."]
code: def observe(self, disable_fog=False, target_game_loop=0):
      """Get a current observation."""
      obs = self._client.send(
          observation=sc_pb.RequestObservation(
              game_loop=target_game_loop, disable_fog=disable_fog
          )
      )
  
      if obs.observation.game_loop == 2**32 - 1:
          logging.info("Received stub observation.")
  
          if not obs.player_result:
              raise ValueError(
                  "Expect a player result in a stub observation"
              )
          elif self._last_obs is None:
              raise RuntimeError(
                  "Received stub observation with no previous obs"
              )
  
          # Rather than handling empty obs through the code, regurgitate the last
          # observation (+ player result, sub actions).
          new_obs = copy.deepcopy(self._last_obs)
          del new_obs.actions[:]
          new_obs.actions.extend(obs.actions)
          new_obs.player_result.extend(obs.player_result)
          obs = new_obs
          self._last_obs = None
      else:
          self._last_obs = obs
  
      if FLAGS.sc2_log_actions and obs.actions:
          sys.stderr.write(" Executed actions ".center(60, "<") + "\n")
          for action in obs.actions:
              sys.stderr.write(str(action))
          sys.stderr.flush()
  
      return obs
  
imports: import copy
  import functools
  import socket
  import sys
  import time
  from absl import flags
  from absl import logging
  from pysc2.lib import protocol
  from pysc2.lib import static_data
  from pysc2.lib import stopwatch
  import websocket
  from s2clientprotocol import debug_pb2
  from s2clientprotocol import sc2api_pb2
label_desc: Use image node_id 13 for calling the RemoteController obj's underlying member method code with example usage: obj.observe(disable_fog, target_game_loop) and returns: obs