          self.stats.tree_clear()
          self.reset_session_info()
  
      def save_session(self):
          """ Save sessions stats to csv """
          logger.debug("Saving session")
 
</s> remove                   for side in sorted(list(loss.keys()))]
 </s> add                   for side in sorted(loss.keys())] </s> remove         self.loss = {side: dict() for side in sides}
 </s> add         self.loss = {side: [0] for side in sides}
        self.session = None
          self.stats.tree_clear()
          self.reset_session_info()
        self.session = None
  
      def save_session(self):
          """ Save sessions stats to csv """
          logger.debug("Saving session")
keep add keep keep keep keep
 Bugfixes: PingPong Training

Print loss correctly for PingPong Training
Don't load Analysis stats for PingPong Training 
lib/gui/display_analysis.py