have issue when run bow.py

[flyboyer]

Traceback (most recent call last):
File "bow.py", line 111, in
results = se.eval(transfer_tasks)
File "../senteval/engine.py", line 59, in eval
self.results = {x: self.eval(x) for x in name}
File "../senteval/engine.py", line 59, in
self.results = {x: self.eval(x) for x in name}
File "../senteval/engine.py", line 121, in eval
self.results = self.evaluation.run(self.params, self.batcher)
File "../senteval/binary.py", line 49, in run
enc_input = np.vstack(enc_input)
File "/home/zzh/wyk_paper/software/anaconda3/envs/sentEval/lib/python3.6/site-packages/numpy/core/shape_base.py", line 234, in vstack
return _nx.concatenate([atleast_2d(_m) for _m in tup], 0)
ValueError: need at least one array to concatenate

when run bow's Transfer task : MR ，it's appear this issue.how to solve it and why?

[devfoo-one]

@flyboyer I had the same issue and fixed it for me: The problem was that i accidentally deleted the SentEval/data/downstream/tokenizer.sed file (wrong .gitignore config for the data folders). This led to empty data files SentEval/data/MR/Rt-polarity.* which caused the enc_input = np.vstack(enc_input) to crash because the enc_input was an empty list.

So checking if your tokenizer.sed exists and if your Rt-polarity.* files do contain data should help.

[devfoo-one]

FYI: #59 also leads to empty MR data files and may cause the same error.