multiple bug fixes in dealing with measurements + CartPole_DFP preset (#92)

environments/doom_environment_wrapper.py

@@ -135,7 +135,7 @@ class DoomEnvironmentWrapper(EnvironmentWrapper):
         # extract all data from the current state
         state = self.game.get_state()
         if state is not None and state.screen_buffer is not None:
-            self.observation = {
+            self.state = {
                 'observation': state.screen_buffer,
                 'measurements': state.game_variables,
             }

environments/gym_environment_wrapper.py

@@ -113,7 +113,7 @@ class GymEnvironmentWrapper(EnvironmentWrapper):
             self.timestep_limit = self.env.spec.timestep_limit
         else:
             self.timestep_limit = None
-        self.measurements_size = len(self.step(0)['info'].keys())
+        self.measurements_size = (len(self.step(0)['info'].keys()),)
         self.random_initialization_steps = self.tp.env.random_initialization_steps
 
     def _wrap_state(self, state):