AttributeError: 'TextMultiField' object has no attribute 'is_target'

[tangxiangru]

Traceback (most recent call last):
File "translate.py", line 42, in module
main(opt)
File "translate.py", line 27, in main
attn_debug=opt.attn_debug
File "/home/txr/OpenNMT-py-ende/onmt/translate/translator.py", line 208, in translate
for batch in data_iter:
File "/home/txr/anaconda3/envs/python3/lib/python3.5/site-packages/torchtext/data/iterator.py", line 157, in iter
yield Batch(minibatch, self.dataset, self.device)
File "/home/txr/anaconda3/envs/python3/lib/python3.5/site-packages/torchtext/data/batch.py", line 26, in init
self.input_fields = [k for k, v in dataset.fields.items() if
File "/home/txr/anaconda3/envs/python3/lib/python3.5/site-packages/torchtext/data/batch.py", line 27, in
v is not None and not v.is_target]
AttributeError: 'TextMultiField' object has no attribute 'is_target'

[mttk]

This bug has been fixed in master recently, and your code will work if you install torchtext from source. RawField, which TextMultiField inherits from, was missing the is_target attribute.

[Fronkan]

Just for everyone running on the currently latest version on pip, version 0.3.1, and won't or can't install from source here is a simple work around for the issue:

field = RawField()
field.is_target = False