refactor(typing): Update event_handler to pass strict checks

[BVMiko]

While testing out moving an APIGatewayRestResolver projects to run mypy in strict mode, I noticed that 4 areas were failing type inference:

router = Router()

throws: error: Call to untyped function "Router" in typed context [no-untyped-call]

and

@router.get('/hello')
def hello_get() -> Response[str]:
    return Response(200, body="Hello World!")

throws: error: Untyped decorator makes function "hello_get" untyped [misc]

and

@app.exception_handler(Exception)
def handle_generic_exception(exception: Exception) -> Response[str]:
    return Response(500, 'error')

throws: error: Untyped decorator makes function "handle_generic_exception" untyped [misc]

and

foo = 42
app.append_context(foo=foo)

throws: error: Call to untyped function "append_context" in typed context [no-untyped-call]

Issue number:

Summary

Changes

Added some simple type definitions to affected areas of these 4 components.

User experience

The above code examples will not raise errors when running mypy --strict

Checklist

If your change doesn't seem to apply, please leave them unchecked.

• [x] Meet tenets criteria
• [x] I have performed a self-review of this change
• [ ] Changes have been tested
• [ ] Changes are documented
• [x] PR title follows conventional commit semantics

Is this a breaking change?

RFC issue number:

Checklist:

• [ ] Migration process documented
• [ ] Implement warnings (if it can live side by side)

Acknowledgment

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[leandrodamascena]

Hi @BVMiko! Thanks for submitting this PR! Can I ask you to open an issue telling us what problem you want to solve here? We love explaining the challenges customers face and how they can contribute to solving them.

Also, I see mypy complaining about types, can you please check?

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
45.0% Duplication on New Code

See analysis details on SonarCloud

[leandrodamascena]

Hi @BVMiko! I'll close this PR and create a new one targeting the develop branch. I'll give you credit in the release notes.

[leandrodamascena]

Actually it was resolved here: https://github.com/aws-powertools/powertools-lambda-python/pull/5601