flair import 在 mac ubuntu 和 google colab 上失败

Question

i am trying to use flair nlp framework,

https://github.com/flairNLP/flair

but getting error

# load the NER tagger
tagger = SequenceTagger.load('ner')

tried on local, remote and other machine. all failing as its not able to download a model from s3.google colab also gives same error.

all give error message as:

OSError: HEAD request failed for url https://s3.eu-central-1.amazonaws.com/alan-nlp/resources/models-v0.4/NER-conll03-english/en-ner-conll03-v0.4.pt with status code 301.

.

Answer 1

I was having the same issue, I don't know what happen with the link but I found another one.

You can look flair master repo https://github.com/flairNLP/flair/blob/master/flair/models/sequence_tagger_model.py on the def _fetch_model(model_name) line 971. There are using another path already "https://nlp.informatik.hu-berlin.de/resources/models", so they change to that path instead of alan-nlp.

So you can find your model here https://nlp.informatik.hu-berlin.de/resources/models/ner/

Answer 2

I had a similar problem to this.

Note that flair now hosts the majority of their models on Huggingface .

Most likely what you need to do is install the latest version of flair which has the sequence_tagger_model.py (and probably others) pointing to the right link.

I had to uninstall flair, and then reinstall it:

pip uninstall flair
pip install flair

to ensure it worked.