> For the many programmers who work in large Python 2 codebases, the even more exciting news is that mypy has full support for type-checking Python 2 programs,

> For the many programmers who work in large Python 2 codebases, the even more exciting news is that mypy has full support for type-checking Python 2 programs, scales to large Python codebases, and can substantially simplify the upgrade to Python 3. Woah! Excellent news. Really cool that they found a way to use this opportunity to bolster Python 3 migration.