3 ms·Type annotations were introduced in 2008 and even type hints over decade ago in Sept 2015.by jampekka 1y agoType annotations were introduced in 2008 and even type hints over decade ago in Sept 2015.zacmps 1y agoBut there has been continual improvement over that time, both in the ecosystem, and in the language (like a syntax for generics).9dev 1y agoAnd yet you still cannot write even moderately complex type expressions without severe pain.