When I want to preprocess, I get _pickle.PicklingError: Can’t pickle <function Field. at 0x7f7ecf70cb70>: attribute lookup Field. on torchtext.data.field failed.
When I try pip install torchtext, I get requirement already satisfied.
Working in Python 3.6.3.
I just updated my opennmt-py with git pull origin master
Can anyone help me? tx.