config.py not set up to run with single GPU

[pfps]

When I process run_tree_transformer.py I get an error:

Traceback (most recent call last):
  File "run_tree_transformer.py", line 236, in <module>
    main()
  File "run_tree_transformer.py", line 212, in main
    , args.device, criterion, max_len_trg, train_flag=True)
  File "/data/pfps/nbref/baseline_model/data_utils/train_tree_encoder.py", line 246, in train_eval_tree
    model = model.module
  File "/tilde/pfps/.local/lib/python3.7/site-packages/torch/nn/modules/module.py", line 594, in __getattr__
    type(self).__name__, name))
AttributeError: 'Transformer' object has no attribute 'module'
(nbref) pfps@heaviside:~/nbref/baseline_model$ git status

I think that this is due to config.py having the wrong default for one or two arguments

        parser.add_argument('--parallel_gpu', action='store_true', default=True)
        parser.add_argument('--dist_gpu', action='store_true', default=True)

doesn't make sense because it is impossible to turn these options off. I changed the default to False which allows further progression.