My understanding was large python code bases (think Google) have a large problem. Someone makes a code change and suddenly it becomes difficult to find the sco

My understanding was large python code bases (think Google) have a large problem. Someone makes a code change and suddenly it becomes difficult to find the scope of type errors in their monorepo. That was the driving force IIRC. That said, I think pytype makes a lot of sense since it infers types from code, which you can edit by hand and then merge back into the python file when your code is stable.