Hello @barreeeiroo! Thank you for opening this issue! This is actually not a bug. We've kept Pydantic v1 as the default in Powertools to avoid issues with dependency resolutions for customers who are using Powertools with Pydantic v1 and don't want to switch to Pydantic v2.

To add the use of Pydantic v2 with Powertools, you must remove the optional dependency for Pydantic. In you case you can change your file:

aws-lambda-powertools[aws-xray-sdk, fastjsonschema]~=2.22.0
pydantic[email]~=2.1.1

Reference: https://docs.powertools.aws.dev/lambda/python/latest/utilities/parser/#using-pydantic-v2

Thanks

Hi @leandrodamascena, you're totally right. I've updated the requirements.txt file to your suggestion and it's now working (I didn't think about removing the parser extra), sorry about the not-bug.

As a possible improvement though, maybe the documentation regarding Pydantic V2 could be improved a little bit. I have already checked the link you mention before (Using Pydantic V2) and my assumption was that I "just" had to include the pydantic v2 dependency, which is what I did. I didn't think about removing the parser extra from aws-lambda-powertools.
Now that I read more carefully the RFC, I can see that you mentioned "customers should refrain from using [all] or [parser] when bringing Pydantic v2 as part of their dependencies" but couldn't actually find it in the documentation where its mentioned how to use Parser with Pydantic V2 (that's why I assumed I only had to include Pydantic V2 as dependency, without any additional task).

In the documentation, right below where it says "Add aws-lambda-powertools and pydantic>=2.0.3 as a dependency in your preferred tool", maybe a warning alert box could be created stating something like "Make sure your aws-lambda-powertools dependency doesn't include the [all] or [parser] extras to avoid the dependency conflict.", just like the RFC said.
I can take care of adding it if you'd like to add that clarification about Pydantic V2 usage.

EDIT: requirements.txt should be:

aws-lambda-powertools[tracer,validation]~=2.22.0

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