[mvzvm]

It's a problem the moment it has to interact with the outside world, especially DBs/serialization/... really any kind of I/O.

[globular-toast]

So Python can't do IO? Django doesn't exist? What are you talking about exactly?

[mvzvm]

I'm talking about type safety. Types matter, a lot, and python is a PITA to use without a system like pyre.