ddp pickle

tests/trainer/test_trainer_cli.py

@@ -1,6 +1,7 @@
 import inspect
 from argparse import ArgumentParser, Namespace
 from unittest import mock
+import pickle
 
 import pytest
 
@@ -42,14 +43,14 @@ def test_add_argparse_args_redefined(cli_args):
 
     args = parser.parse_args(cli_args)
 
+    # make sure we can pickle args
+    pickle.dumps(args)
+
     # Check few deprecated args are not in namespace:
     for depr_name in ('gradient_clip', 'nb_gpu_nodes', 'max_nb_epochs'):
         assert depr_name not in args
 
     trainer = Trainer.from_argparse_args(args=args)
-
-    # make sure trainer can be pickled
-    import pickle
     pickle.dumps(trainer)
 
     assert isinstance(trainer, Trainer)