v3.3.0 - Issue with name conflict in transformers & datasets - AttributeError: module 'datasets' has no attribute '__version__'
Version 3.3.0 tries to import the module [datasets](https://pypi.org/project/datasets/):
https://github.com/huggingface/transformers/blob/v3.3.0/src/transformers/file_utils.py#L69


However, this can cause some undesirable behavior if there is a "datasets" folder in the same folder.

An example to re-produce the error:
```
datasets/   <= Folder that contains your own data files
myscript.py
```

myscript.py with the following content:
```
import transformers
```


This produces the following error:
```
python myscript.py
Traceback (most recent call last):
  File "myscript.py", line 1, in <module>
    import transformers
  File "/home/user/miniconda3/envs/sberttest/lib/python3.7/site-packages/transformers/__init__.py", line 22, in <module>
    from .integrations import (  # isort:skip
  File "/home/user/miniconda3/envs/sberttest/lib/python3.7/site-packages/transformers/integrations.py", line 42, in <module>
    from .trainer_utils import PREFIX_CHECKPOINT_DIR, BestRun  # isort:skip
  File "/home/user/miniconda3/envs/sberttest/lib/python3.7/site-packages/transformers/trainer_utils.py", line 6, in <module>
    from .file_utils import is_tf_available, is_torch_available, is_torch_tpu_available
  File "/home/user/miniconda3/envs/sberttest/lib/python3.7/site-packages/transformers/file_utils.py", line 72, in <module>
    logger.debug(f"Succesfully imported datasets version {datasets.__version__}")
AttributeError: module 'datasets' has no attribute '__version__'
```


The issue is with the import logic of Python. The datasets-folder will be treated as a module and transformers tries to load this module. This obviously fails, as we talk here about the datasets-folder and not [datasets package](https://pypi.org/project/datasets/).

As *datasets* is a quite common folder name in many setups to contain the files for the own datasets, I can image that this name collision will appear frequently. As soon as there is a datasets folder, you can no-longer import transformers.



## Solution
I am not sure what the best solution is for this. One quick fix would be to change:
https://github.com/huggingface/transformers/blob/v3.3.0/src/transformers/file_utils.py#L74

to
```
except:
    _datasets_available = False
```
 
This would catch all exceptions. Old scripts, that have a `datasets/` folder would then still be working.




## Environment info
- `transformers` version: 3.3.0
- Platform: Linux-4.15.0-39-generic-x86_64-with-debian-buster-sid
- Python version: 3.7.9
- PyTorch version (GPU?): 1.6.0 (False)
- datasets package is not installed




Indeed we'll fix this and release a patch soon.<|||||>The bug has been fixed in #7456 and v3.3.1 is out with this fix. The problem should be solved for now, let us know if that's not the case!<|||||>Great, thanks for the quick fix and release of a new version.

It is now working fine in my case :)<|||||>I had the same error but my setup only included a `data/` folder but now **it works fine** with version `3.3.1`.