Feature request: Remove duplication of type when parsing event

[Tom01098]

Use case

When using the event_parser decorator to parse the event, the type will be duplicated if using type hints as a best practice.

@event_parser(model=Order)
def handler(event: Order, context: LambdaContext):
    ...

Solution/User Experience

I am proposing that we can drop the model parameter as we can infer it from events type hint.

@event_parser
def handler(event: Order, context: LambdaContext):
    ...

I am very happy to contribute this feature request, it should be very small and is totally backwards-compatible (model will still be accepted and chosen before type hints are inspected).

Alternative solutions

Keep as-is.

Acknowledgment

• This feature request meets Powertools for AWS Lambda (Python) Tenets
• Should this be considered in other Powertools for AWS Lambda languages? i.e. Java, TypeScript, and .NET

[boring-cyborg]

Thanks for opening your first issue here! We'll come back to you as soon as we can.
In the meantime, check out the #python channel on our Powertools for AWS Lambda Discord: Invite link

[heitorlessa]

Great idea @Tom01098 -- please feel free to send a PR as you suggested 🫶

It's still within our Progressive tenet -- explicit for most of us, and implicit via type hint for the cutting edge.

Feel free to ping on Discord or here if we can help with anything

[github-actions]

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