On Tue, Sep 5, 2017 at 1:20 AM, Oleg Broytman <phd@phdru.name> wrote:
Hi!

On Tue, Sep 05, 2017 at 12:50:35AM +0300, Koos Zevenhoven <k7hoven@gmail.com> wrote:
>     cvar = contextvars.Var(default="the default value",
>                            description="example context variable")

   Why ``description`` and not ``doc``?


​Cause that's a nice thing to bikeshed about? In fact, I probably should have left it out at this point.

Really, it's just to get a meaningful repr for the object and better error messages, without any significance for the substance of the PEP. There are also concepts in the PEP that don't have a name yet.

 
>     with cvar.assign(new_value):

   Why ``assign`` and not ``set``?

​To distinguish from typical set-operations (setattr, setitem), and from sets and from settings. I would rather enter an "assignment context" than a "set context" or "setting context". 

One key point of this PEP is to promote defining context variable scopes on a per-variable (and per-value) basis. I combined the variable and value aspects in this concept of Assignment(variable, value) objects, which define a context that one can enter and exit.


> Each thread of the Python interpreter keeps its on stack of

   "its own", I think.


​That's right, thanks.​

​––Koos​



--
+ Koos Zevenhoven + http://twitter.com/k7hoven +