Can we initialize HuggingFace LED using AllenAI LED
Thisissueon AllenAI/Longformer discusses about the difference between HuggingFace LED and AllenAI LED. What is the correct way of loading Allenai’s pretrained modelled-base-16384?Approach 1:Usingtransformers v4.9.1from transformers import AutoTokenizer, AutoModelForSeq2SeqLM
  
tokenizer = AutoTokenizer.from_pretrained("allenai/led-base-16384")

model = AutoModelForSeq2SeqLM.from_pretrained("allenai/led-base-16384")Approach 2:Using transformer version suggested in[AllenAI/Longformer/requirements.txt](https://github.com/allenai/longformer/blob/master/requirements.txt):git+http://github.com/ibeltagy/transformers.git@longformer_encoder_decoder#egg=transformersfrom transformers import AutoTokenizer
from longformer.longformer_encoder_decoder import LongformerEncoderDecoderForConditionalGeneration
tokenizer = AutoTokenizer.from_pretrained("allenai/led-base-16384")
model = LongformerEncoderDecoderForConditionalGeneration.from_pretrained("allenai/led-base-16384", gradient_checkpointing=True)Results:Approach 1 seems to work but I am not sure whether it is correct because we are loading AllenAI’s pretrained LED using HuggingLED which has different attention window size.Approach 2 produces the error:File "/Users/krishna/opt/anaconda3/envs/CiteKP/lib/python3.8/site-packages/transformers/configuration_utils.py", line 353, in get_config_dict
    raise EnvironmentError
OSError

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "LED_download.py", line 11, in <module>
    tokenizer = AutoTokenizer.from_pretrained("allenai/led-base-16384")
  File "/Users/krishna/opt/anaconda3/envs/CiteKP/lib/python3.8/site-packages/transformers/tokenization_auto.py", line 209, in from_pretrained
    config = AutoConfig.from_pretrained(pretrained_model_name_or_path, **kwargs)
  File "/Users/krishna/opt/anaconda3/envs/CiteKP/lib/python3.8/site-packages/transformers/configuration_auto.py", line 272, in from_pretrained
    config_dict, _ = PretrainedConfig.get_config_dict(pretrained_model_name_or_path, **kwargs)
  File "/Users/krishna/opt/anaconda3/envs/CiteKP/lib/python3.8/site-packages/transformers/configuration_utils.py", line 362, in get_config_dict
    raise EnvironmentError(msg)
OSError: Can't load config for 'allenai/led-base-16384'. Make sure that:

- 'allenai/led-base-16384' is a correct model identifier listed on 'https://huggingface.co/models'

- or 'allenai/led-base-16384' is the correct path to a directory containing a config.json fileI think the error is because the latest pretrained modelallenai/led-base-16384is not compatible with the transformers version (i.e.v3.1.0) mentioned in their requirements.txt?