Issue: Error loading wikitext data    raise NotImplementedError(f"Loading a dataset cached in a {type(self._fs).__name__} is not supported.")
State: closed
Author: Ahmed-Roushdy

I was trying to load  the wiki dataset, but i got this error 

    traindata = load_dataset('wikitext', 'wikitext-2-raw-v1', split='train')
  File "/home/aelkordy/.conda/envs/prune_llm/lib/python3.9/site-packages/datasets/load.py", line 1804, in load_dataset
    ds = builder_instance.as_dataset(split=split, verification_mode=verification_mode, in_memory=keep_in_memory)
  File "/home/aelkordy/.conda/envs/prune_llm/lib/python3.9/site-packages/datasets/builder.py", line 1108, in as_dataset
    raise NotImplementedError(f"Loading a dataset cached in a {type(self._fs).__name__} is not supported.")
NotImplementedError: Loading a dataset cached in a LocalFileSystem is not supported.

Comments:
+1 
```
Found cached dataset csv (file:///home/ubuntu/.cache/huggingface/datasets/theSquarePond___csv/theSquarePond--XXXXX-bbf0a8365d693d2c/0.0.0/eea64c71ca8b46dd3f537ed218fc9bf495d5707789152eb2764f5c78fa66d59d)
---------------------------------------------------------------------------
NotImplementedError                       Traceback (most recent call last)
Cell In[14], line 4
      1 get_ipython().system('pip install -U datasets')
      3 # Load dataset from the hub
----> 4 dataset = load_dataset(dataset_name)

File ~/anaconda3/envs/python38-env/lib/python3.8/site-packages/datasets/load.py:1810, in load_dataset(path, name, data_dir, data_files, split, cache_dir, features, download_config, download_mode, verification_mode, ignore_verifications, keep_in_memory, save_infos, revision, use_auth_token, task, streaming, num_proc, storage_options, **config_kwargs)
   1806 # Build dataset for splits
   1807 keep_in_memory = (
   1808     keep_in_memory if keep_in_memory is not None else is_small_dataset(builder_instance.info.dataset_size)
   1809 )
-> 1810 ds = builder_instance.as_dataset(split=split, verification_mode=verification_mode, in_memory=keep_in_memory)
   1811 # Rename and cast features to match task schema
   1812 if task is not None:

File ~/anaconda3/envs/python38-env/lib/python3.8/site-packages/datasets/builder.py:1128, in DatasetBuilder.as_dataset(self, split, run_post_process, verification_mode, ignore_verifications, in_memory)
   1126 is_local = not is_remote_filesystem(self._fs)
   1127 if not is_local:
-> 1128     raise NotImplementedError(f"Loading a dataset cached in a {type(self._fs).__name__} is not supported.")
   1129 if not os.path.exists(self._output_dir):
   1130     raise FileNotFoundError(
   1131         f"Dataset {self.name}: could not find data in {self._output_dir}. Please make sure to call "
   1132         "builder.download_and_prepare(), or use "
   1133         "datasets.load_dataset() before trying to access the Dataset object."
   1134     )

NotImplementedError: Loading a dataset cached in a LocalFileSystem is not supported.
```

+1

```
Found cached dataset csv ([file://C:/Users/Shady/.cache/huggingface/datasets/knkarthick___csv/knkarthick--dialogsum-cd36827d3490488d/0.0.0/6954658bab30a358235fa864b05cf819af0e179325c740e4bc853bcc7ec513e1](file:///C:/Users/Shady/.cache/huggingface/datasets/knkarthick___csv/knkarthick--dialogsum-cd36827d3490488d/0.0.0/6954658bab30a358235fa864b05cf819af0e179325c740e4bc853bcc7ec513e1))
---------------------------------------------------------------------------
NotImplementedError                       Traceback (most recent call last)
Cell In[38], line 3
      1 huggingface_dataset_name = "knkarthick/dialogsum"
----> 3 dataset = load_dataset(huggingface_dataset_name)

File D:\Desktop\Workspace\GenAI\genai\lib\site-packages\datasets\load.py:1804, in load_dataset(path, name, data_dir, data_files, split, cache_dir, features, download_config, download_mode, verification_mode, ignore_verifications, keep_in_memory, save_infos, revision, use_auth_token, task, streaming, num_proc, storage_options, **config_kwargs)
   1800 # Build dataset for splits
   1801 keep_in_memory = (
   1802     keep_in_memory if keep_in_memory is not None else is_small_dataset(builder_instance.info.dataset_size)
   1803 )
-> 1804 ds = builder_instance.as_dataset(split=split, verification_mode=verification_mode, in_memory=keep_in_memory)
   1805 # Rename and cast features to match task schema
   1806 if task is not None:

File D:\Desktop\Workspace\GenAI\genai\lib\site-packages\datasets\builder.py:1108, in DatasetBuilder.as_dataset(self, split, run_post_process, verification_mode, ignore_verifications, in_memory)
   1106 is_local = not is_remote_filesystem(self._fs)
   1107 if not is_local:
-> 1108     raise NotImplementedError(f"Loading a dataset cached in a {type(self._fs).__name__} is not supported.")
   1109 if not os.path.exists(self._output_dir):
   1110     raise FileNotFoundError(
   1111         f"Dataset {self.name}: could not find data in {self._output_dir}. Please make sure to call "
   1112         "builder.download_and_prepare(), or use "
   1113         "datasets.load_dataset() before trying to access the Dataset object."
   1114     )

NotImplementedError: Loading a dataset cached in a LocalFileSystem is not supported.
```

This error stems from a breaking change in `fsspec`. It has been fixed in the latest `datasets` release (`2.14.6`). Updating the installation with `pip install -U datasets` should fix the issue.


> 此错误源于 中的重大更改。此问题已在最新版本 （） 中修复。更新安装应该可以解决此问题。`fsspec``datasets``2.14.6``pip install -U datasets`

thanks ,  太好啦，刚好解决了我的问题，GPT都没解决了，终于被你搞定了

https://stackoverflow.com/questions/77433096/notimplementederror-loading-a-dataset-cached-in-a-localfilesystem-is-not-suppor/77433141#77433141

Fixed by:
- https://github.com/huggingface/datasets/pull/6334

The fix was released in `datasets-2.14.6`.

this is fixed in 2.15.0, but broken again in 2.17.0. Can someone verify?

I'm on `2.17.1` and can confirm it's broken again. Downgrading to `2.16` helped.

> 2.14.6

i update the version but the error still exist 


The issue seems to persist in 2.18.0

same problem in 2.18.0

Which version of `fsspec` and OS are you using ?

> Which version of `fsspec` and OS are you using ?

`fsspec-2023.10.0` and Windows 10, guess fsspec version too old...