What's the best way to minimize the need of run time checks?

[BartC]

On 13/08/2016 12:10, Chris Angelico wrote:
> On Sat, Aug 13, 2016 at 8:09 PM, BartC <bc at freeuk.com> wrote:

> And if subclassing isn't enough, there's no end of stuff you can do
> with decorators. Try this:
>
> class Foo:
>     @prop
>     class demo:
>         """Declarative property"""
>         def get(self):
>             print("Getting %s.demo" % self)
>             return 42
>         def set(self, val):
>             print("Setting %s.demo" % self)
>         def delete(self):
>             print("Deleting %s.demo" % self)
>
> Yaknow, because @property is just waaaaaaay too clunky, right? :) But
> I needed a simple demo. The decorator isn't even all that complicated.
>
> def prop(cls):
>     return property(cls.get, getattr(cls, "set"), getattr(cls,
> "delete"), cls.__doc__)

Which level is this nearer to, human thoughts or cpu codes?

My knowledge of Python isn't advanced enough to understand what this 
does. But if you would be good enough to explain or to show the end 
results (what it makes possible) then I could get an opinion as to how 
hard it might be with less dynamic features.

(But don't try and explain decorators. I've tried several times to get 
my head around them.)

-- 
bartc