Can't get attribute '_default_unk_index'

[pawankmrs]

'bash run.sh' failed with following error:
Traceback (most recent call last):
File "main.py", line 203, in
DOC.vocab = torch.load(args.vocab)
File "anaconda3/envs/NSEG/lib/python3.6/site-packages/torch/serialization.py", line 387, in load
return _load(f, map_location, pickle_module, **pickle_load_args)
File "anaconda3/envs/NSEG/lib/python3.6/site-packages/torch/serialization.py", line 574, in _load
result = unpickler.load()
AttributeError: Can't get attribute '_default_unk_index' on <module 'torchtext.vocab' from '/anaconda3/envs/NSEG/lib/python3.6/site-packages/torchtext/vocab.py'>

[pawankmrs]

torchtext 0.4.0 seems to be the problem. torchtext 0.3.1 instead of solves it.