Official support for MyPy

[heitorlessa]

Original author: @huonw

Runtime e.g. Python, Java, all of them. Python

Is your feature request related to a problem? Please describe.

As per in the original Lambda Powertools Python Discussions, MyPy isn't officially supported and can fail when type checking Tracer, as an example.

Describe the solution you'd like

Lambda Powertools to consider MyPy customers and include MyPy in the pipeline to make it compliant :-)

Describe alternatives you've considered

Ignoring type errors

Is this something you'd like to contribute if you had guidance?

Additional context

[heitorlessa]

As of 1.18.1, we've made substantial progress on here and have only a handful of issues to fix. I'll mark this as shipped once we address all of them and include MyPy in the CI to keep it consistent

[huonw]

Bug fixes were largely on MyPy errors (~600 to 38) across the entire code base

That's awesome. Thanks for the update!

[heitorlessa]

We've got 14 errors now down from 38. More improvements to come as we will make a release dedicated to it, and enable MyPy at CI by default once these are addressed to prevent regressions

[heitorlessa]

Just merged. @huonw thank you for your patience on this -- next release will have full Mypy support now!!

[huonw]

That's exciting! Thanks for the updates

[heitorlessa]

Closing as this is now official as of two releases ago ;)