Mercurial’s journey to and reflections on Python 3
For me this is the most exciting outcome:<p>> The only Python 3 feature that Mercurial developers seem to almost universally get excited about is type annotations. We already have some people playing around with pytype using comment-based annotations and pytype has already caught a few bugs. We're eager to go all in on type annotations and uncover lots of dynamic typing bugs and poorly implemented APIs.<p>Over in perl land people still spill their hate on types, which caused hard forks.