MyPy error on @metrics.log_metrics(capture_cold_start_metric=True)

[michaelbrewer]

What were you trying to accomplish?

Run MyPy linter on code:

from aws_lambda_powertools import Metrics

metrics = Metrics()

@metrics.log_metrics(capture_cold_start_metric=True)
def handler(event, context) -> Dict[str, str]:
    ...

Expected Behavior

No MyPy errors should be returned

Current Behavior

Mypy error Mypy: <nothing> not callable is returned on line @metrics.log_metrics(capture_cold_start_metric=True)

Possible Solution

Environment

• Powertools version used: 1.21.0
• Packaging format (Layers, PyPi): PyPi
• AWS Lambda function runtime: Python 3.9
• Debugging logs

[heitorlessa]

Sadly it's a regression after adding callable types in the return to fix one thing - I couldn't catch that with mypy somehow running locally.

Now it's the time to ignore the areas we won't be able to fix with MyPy anytime soon (Parameters/Logger), and add it at CI level to catch it early.

[heitorlessa]

Coming shortly in a patch releae