What's New in Pylint 2.2¶

Release:	2.2
Date:	TBA

Summary -- Release highlights¶

Ignore import x.y.z as z cases for checker useless-import-alias.
unnecessary-pass is now also emitted when a function or class contains only docstring and pass statement, in which case, docstring is enough for empty definition.
Fix false positive undefined-variable and used-before-assignment with nonlocal keyword usage.
Fix exceptions being raised when one of the params is not a ClassDef for checkers.utils.is_subclass_of().
pylint now picks the latest value from the inferred values of the exception that gets raised, when looking for raising-non-exception. This helps when reusing a variable name for multiple types, since pylint was picking just the first inferred value, leading to spurious false positives.

Close #2431
pylint used to emit a not-an-iterable error when looking at coroutines built with asyncio.coroutine. This is no longer the case as we handle coroutines explicitly.

Close #996
pylint used to emit a unused-variable error if unused import was found in the function. Now instead of unused-variable, unused-import is emitted.

Close #2421