[skip ci] adding statement to import rank

ml-agents/mlagents/trainers/learn.py

 
     new_initializers = all_initializers - original_initializers
     new_trainers = all_trainers - original_trainers
-    print(f"Found %s new initializers" % len(new_initializers))
-    print(f"Found %s new trainers" % len(new_trainers))
+    print(f"Found {len(new_initializers)} new initializers")
+    print(f"Found {len(new_trainers)} new trainers")
     print(all_initializers)
     print(new_initializers)
     print(all_trainers)

ml-agents/mlagents/trainers/saver/tf_saver.py

 from mlagents.trainers.policy.tf_policy import TFPolicy
 from mlagents.trainers.optimizer.tf_optimizer import TFOptimizer
 from mlagents.trainers import __version__
+from mlagents.tf_utils.globals import get_rank
 
 
 logger = get_logger(__name__)
         self.graph = None
         self.sess = None
         self.tf_saver = None
+        self.rank = get_rank()
 
     def register(self, module: Union[TFPolicy, TFOptimizer]) -> None:
         if isinstance(module, TFPolicy):