Issue about pipeline of sentiment-analysis
Hi,
I tried the `pipeline` code on the README:
```
from transformers import pipeline

nlp = pipeline('sentiment-analysis')
print(nlp('We are very happy to include pipeline into the transformers repository.'))
```

However, it shows the following error:
```
I0131 01:02:23.627610 4420611520 file_utils.py:35] PyTorch version 1.1.0.post2 available.
I0131 01:02:28.316742 4420611520 file_utils.py:362] https://s3.amazonaws.com/models.huggingface.co/bert/bert-base-uncased-vocab.txt not found in cache or force_download set to True, downloading to /var/folders/bg/126twh7d29bdtfqxjf_s2kr40000gn/T/tmp_lgvnb3l
I0131 01:02:30.348834 4420611520 file_utils.py:377] copying /var/folders/bg/126twh7d29bdtfqxjf_s2kr40000gn/T/tmp_lgvnb3l to cache at /Users/yantong/.cache/torch/transformers/26bc1ad6c0ac742e9b52263248f6d0f00068293b33709fae12320c0e35ccfbbb.542ce4285a40d23a559526243235df47c5f75c197f04f37d1a0c124c32c9a084
I0131 01:02:30.349704 4420611520 file_utils.py:381] creating metadata file for /Users/yantong/.cache/torch/transformers/26bc1ad6c0ac742e9b52263248f6d0f00068293b33709fae12320c0e35ccfbbb.542ce4285a40d23a559526243235df47c5f75c197f04f37d1a0c124c32c9a084
I0131 01:02:30.350285 4420611520 file_utils.py:390] removing temp file /var/folders/bg/126twh7d29bdtfqxjf_s2kr40000gn/T/tmp_lgvnb3l
I0131 01:02:30.350615 4420611520 tokenization_utils.py:398] loading file https://s3.amazonaws.com/models.huggingface.co/bert/bert-base-uncased-vocab.txt from cache at /Users/yantong/.cache/torch/transformers/26bc1ad6c0ac742e9b52263248f6d0f00068293b33709fae12320c0e35ccfbbb.542ce4285a40d23a559526243235df47c5f75c197f04f37d1a0c124c32c9a084
I0131 01:02:31.742653 4420611520 file_utils.py:362] https://s3.amazonaws.com/models.huggingface.co/bert/distilbert-base-uncased-finetuned-sst-2-english-config.json not found in cache or force_download set to True, downloading to /var/folders/bg/126twh7d29bdtfqxjf_s2kr40000gn/T/tmp7wk7u8_r
I0131 01:02:32.793608 4420611520 file_utils.py:377] copying /var/folders/bg/126twh7d29bdtfqxjf_s2kr40000gn/T/tmp7wk7u8_r to cache at /Users/yantong/.cache/torch/transformers/437d6b3001e14ea1853bcee09a1b2557f230862c5a03d3ebd78a4cdb94a79020.7a412cd94061214ced4285ea8f65100868e4c9757c85781d11a83acd01fa14a4
I0131 01:02:32.794027 4420611520 file_utils.py:381] creating metadata file for /Users/yantong/.cache/torch/transformers/437d6b3001e14ea1853bcee09a1b2557f230862c5a03d3ebd78a4cdb94a79020.7a412cd94061214ced4285ea8f65100868e4c9757c85781d11a83acd01fa14a4
I0131 01:02:32.794360 4420611520 file_utils.py:390] removing temp file /var/folders/bg/126twh7d29bdtfqxjf_s2kr40000gn/T/tmp7wk7u8_r
I0131 01:02:32.794815 4420611520 configuration_utils.py:185] loading configuration file https://s3.amazonaws.com/models.huggingface.co/bert/distilbert-base-uncased-finetuned-sst-2-english-config.json from cache at /Users/yantong/.cache/torch/transformers/437d6b3001e14ea1853bcee09a1b2557f230862c5a03d3ebd78a4cdb94a79020.7a412cd94061214ced4285ea8f65100868e4c9757c85781d11a83acd01fa14a4
I0131 01:02:32.795076 4420611520 configuration_utils.py:199] Model config {
  "activation": "gelu",
  "attention_dropout": 0.1,
  "dim": 768,
  "dropout": 0.1,
  "finetuning_task": "sst-2",
  "hidden_dim": 3072,
  "id2label": {
    "0": "NEGATIVE",
    "1": "POSITIVE"
  },
  "initializer_range": 0.02,
  "is_decoder": false,
  "label2id": {
    "NEGATIVE": 0,
    "POSITIVE": 1
  },
  "max_position_embeddings": 512,
  "n_heads": 12,
  "n_layers": 6,
  "num_labels": 2,
  "output_attentions": false,
  "output_hidden_states": false,
  "output_past": true,
  "pruned_heads": {},
  "qa_dropout": 0.1,
  "seq_classif_dropout": 0.2,
  "sinusoidal_pos_embds": false,
  "tie_weights_": true,
  "torchscript": false,
  "use_bfloat16": false,
  "vocab_size": 30522
}

I0131 01:02:33.892992 4420611520 file_utils.py:362] https://s3.amazonaws.com/models.huggingface.co/bert/distilbert-base-uncased-finetuned-sst-2-english-modelcard.json not found in cache or force_download set to True, downloading to /var/folders/bg/126twh7d29bdtfqxjf_s2kr40000gn/T/tmpgd57b64v
I0131 01:02:35.001976 4420611520 file_utils.py:377] copying /var/folders/bg/126twh7d29bdtfqxjf_s2kr40000gn/T/tmpgd57b64v to cache at /Users/yantong/.cache/torch/transformers/57ded08a298ef01c397973781194aa0abf6176e6f720f660a2b93e8199dc0bc7.455d944f3d1572ab55ed579849f751cf37f303e3388980a42d94f7cd57a4e331
I0131 01:02:35.002447 4420611520 file_utils.py:381] creating metadata file for /Users/yantong/.cache/torch/transformers/57ded08a298ef01c397973781194aa0abf6176e6f720f660a2b93e8199dc0bc7.455d944f3d1572ab55ed579849f751cf37f303e3388980a42d94f7cd57a4e331
I0131 01:02:35.002778 4420611520 file_utils.py:390] removing temp file /var/folders/bg/126twh7d29bdtfqxjf_s2kr40000gn/T/tmpgd57b64v
I0131 01:02:35.003092 4420611520 modelcard.py:154] loading model card file https://s3.amazonaws.com/models.huggingface.co/bert/distilbert-base-uncased-finetuned-sst-2-english-modelcard.json from cache at /Users/yantong/.cache/torch/transformers/57ded08a298ef01c397973781194aa0abf6176e6f720f660a2b93e8199dc0bc7.455d944f3d1572ab55ed579849f751cf37f303e3388980a42d94f7cd57a4e331
I0131 01:02:35.003378 4420611520 modelcard.py:192] Model card: {
  "caveats_and_recommendations": {},
  "ethical_considerations": {},
  "evaluation_data": {},
  "factors": {},
  "intended_use": {},
  "metrics": {},
  "model_details": {},
  "quantitative_analyses": {},
  "training_data": {}
}

I0131 01:02:36.353755 4420611520 modeling_utils.py:406] loading weights file https://s3.amazonaws.com/models.huggingface.co/bert/distilbert-base-uncased-finetuned-sst-2-english-pytorch_model.bin from cache at /Users/yantong/.cache/torch/transformers/f62a0baccbff4fbb83b3b6c63168af997d5aea02fc1a8ea2ab0a26dd79ac6517.461f3160566473d3587f9f4776a5131b1ed527b0d5fccb4b5f06003f457154bc
Traceback (most recent call last):
  File "/Users/yantong/Library/Python/3.7/lib/python/site-packages/transformers/modeling_utils.py", line 415, in from_pretrained
    state_dict = torch.load(resolved_archive_file, map_location='cpu')
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/torch/serialization.py", line 387, in load
    return _load(f, map_location, pickle_module, **pickle_load_args)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/torch/serialization.py", line 581, in _load
    deserialized_objects[key]._set_from_file(f, offset, f_should_read_directly)
RuntimeError: unexpected EOF, expected 75086145 more bytes. The file might be corrupted.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/yantong/PycharmProjects/Attribute_Inference_Attack_Reviews/transformer_pipelines.py", line 5, in <module>
    nlp = pipeline('sentiment-analysis')
  File "/Users/yantong/Library/Python/3.7/lib/python/site-packages/transformers/pipelines.py", line 905, in pipeline
    model = model_class.from_pretrained(model, config=config, **model_kwargs)
  File "/Users/yantong/Library/Python/3.7/lib/python/site-packages/transformers/modeling_auto.py", line 601, in from_pretrained
    return DistilBertForSequenceClassification.from_pretrained(pretrained_model_name_or_path, *model_args, **kwargs)
  File "/Users/yantong/Library/Python/3.7/lib/python/site-packages/transformers/modeling_utils.py", line 417, in from_pretrained
    raise OSError("Unable to load weights from pytorch checkpoint file. "
OSError: Unable to load weights from pytorch checkpoint file. If you tried to load a PyTorch model from a TF 2.0 checkpoint, please set from_tf=True. 

Process finished with exit code 134 (interrupted by signal 6: SIGABRT)
```

I tried downloading the `distilbert-base-uncased-finetuned-sst-2-english-pytorch_model.bin` and copied to the `.cache/torch/transformers` directory, but it still doesn't work. 

OS: MacOS
transformers version: 2.3.0

Could somebody help me fix this issue? Thanks in advance! 
I can't reproduce this. It works fine for me. Can you try deleting the cache directory and trying again?<|||||>@BramVanroy 
Yes, I tried deleting the cached file under the `.cached` directory, but it still doesn't work for me.<|||||>Works for me too. Are you sure you deleted the right file?

<|||||>@julien-c 
Yes, I deleted all the files under the `.cached/torch` directory and run the code again. It has been downloading the file for 12+ hours but still doesn't show any results. Could you please give me some advice?<|||||>Finally, it works. Solved by deleting all the cached files under the `.cached/torch` directory. I guessed the reason for the failure of downloading or lasting for a long time is the network speed.😓
Thank you so much for your guidance and patience!<|||||>@icmpnorequest 
Could you please show me where is the **.cached/torch** directory, I got the same problem and I'd like to try your solutions to delete this directory.

Thanks for your guidance in advance.<|||||>@stepbystep88 
I use macOS and it is `/USERNAME/.cached/torch` (USERNAME should be replaced by your own). May it would help.