Ok thanks.  If I now want to infer using the trained weights can I still do
test_sen1 = TEXT.preprocess(test_sen1)
test_sen1 = [[TEXT.vocab.stoi[x] for x in test_sen1]]
test_sen1 = np.asarray(test_sen1)
test_sen1 = torch.LongTensor(test_sen1)
test_tensor1 = Variable(test_sen1, volatile=True)
output = model(test_tensor1,1)

I suppose this may still be ok as the TEXT object is just supplying the indices?