I am just not sure what did you mean to discourage in part A.
> A) If you're writing high-performance code DON'T you _will_ hit bottlenecks which are non-trivial to the language unless you're a guru.
DON'T do what? don't try to hyper-optimize your code? don't use all types of "fancy" constructs like how the post shows?
Python like this is great for low CPU hyper responsive code, or for increasing efficiency of existing constructs. As a rule of advice to anyone who asks me this, go away and read about the benefits of compiled over interpreted code. There's to much to conver in 30s and frankly if you're worrying about extreme performance you shouldn't be using python... That's not too say I don't think python is awesome, but, write a module in something else :p