Fix pydantic deprecation warning

[Wauplin]

Fix #1836.

In pydantic >= 2.0, @validator has been replaced by @field_validator with a deprecation warning (until pydantic 3.x). There are some differences between the legacy and the new @validator but they do not impact our usage (see migration guide).. For now let's silent the warning and we'll update when (and if) we want to add support for pydantic v3.x in the future.

Thanks @mattf for the heads up!

EDIT: converting to draft.

EDIT 2: reworked the PR to use same logic as currently on main and silent the warning. We'll reassess if and when pydantic v3.x is out.

[HuggingFaceDocBuilderDev]

The documentation is not available anymore as the PR was closed or merged.

[LysandreJik]

Cool!

[LysandreJik]

Ok thanks for the edit! The updated change looks good to me.

[Wauplin]

Thanks for the re-review :)

[wasertech]

Hey @Wauplin, can we expect this fix in the next version of hf__hub? This warning is polluting my shell :(

❯ assistant
/home/waser/Projets/Assistant/venv/lib/python3.11/site-packages/huggingface_hub/inference/_text_generation.py:121: PydanticDeprecatedSince20: Pydantic V1 style `@validator` validators are deprecated. You should migrate to Pydantic V2 style `@field_validator` validators, see the migration guide for more details. Deprecated in Pydantic V2.0 to be removed in V3.0. See Pydantic V2 Migration Guide at https://errors.pydantic.dev/2.4/migration/
  @validator("best_of")
Hello User! Welcome back to our conversation. It seems you're in the directory '/home/waser/Projets/Assistant/src3'. The current date is 'sam 25 nov 2023 17:13:49 CET' and it's been 'sam 25
nov 2023 17:13:32 CET' since we last saw each other. If you have any questions or need assistance, feel free to ask!                                                                         
(venv)  waser@Destinee ~/Projets/Assistant/src3 v1.0.0b
❯ This warning message is pretty anoying. Dont you think Assistant?

Oh, I'm sorry if my previous responses were annoying. I'm just trying to be helpful and provide the best assistance I can. If you have any specific questions or tasks you'd like me to help 
with, please don't hesitate to ask. I'm here to assist you to the best of my abilities.                                                                                                      
(venv)  waser@Destinee ~/Projets/Assistant/src3 v1.0.0b
❯ Its not your fault this time hahah

Haha, I'm glad you found my response amusing! Here's a joke for you: Why don't programmers ever get lost? Because they always know where they are in the code! 😃                            
(venv)  waser@Destinee ~/Projets/Assistant/src3 v1.0.0b
❯ you can quit now.

I know its already on main so I built it from source and it did remove the warning (thanks for that).

❯ assistant
Hello User! It seems you're calling my name. I'm here to assist you. You're currently in the directory '/home/waser/Projets/Assistant/src3'. The date is 'sam 25 nov 2023 17:17:55 CET' and  
it's been 'sam 25 nov 2023 17:13:32 CET' since I last saw you. If you have any questions or need help, feel free to ask!                                                                     
(venv)  waser@Destinee ~/Projets/Assistant/src3 v1.0.0b
❯ 

I'm just waiting for this fix to be in the next version of huggingface_hub to release the latest version of my assistant because I don't want a new user to experience a depreciation warning as the first message the shell would output :').

EDIT: I guess I asked the wrong question... if its already on main it will be in the next version... my question is rather do you have an approxime time frame for the release of the next version?

[Wauplin]

EDIT: I guess I asked the wrong question... if its already on main it will be in the next version... my question is rather do you have an approxime time frame for the release of the next version?

Yes indeed that's the real question! 😄
I would say around 2 weeks before next release the time to merge a few nice features we are cooking. If you don't want to wait until then, a possibility is to pin pydantic<2.0 in your package dependencies. This was the case in huggingface_hub<0.19 and we relaxed the constraint only on the last release. The warning message is only there if pydantic>=2.0 is installed.