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Fri Jan 5 11:29:26 EST 2018 · https://mail.python.org/pipermail/python-dev/2018-January/151618.html

On Fri, Jan 5, 2018 at 2:05 AM, Victor Stinner <victor.stinner at gmail.com>
wrote:

> Currently, Context.get(var) returns None when "var in context" is false.
> That's surprising and different than var.get(), especially when var has a
> default value.
>

I don't see the problem. Context.get() is inherited from Mapping.get(); if
you want it to raise use Context.__getitem__() (i.e. ctx[var]). Lots of
classes define get() methods with various behaviors. Context.get() and
ContextVar.get() are just different -- ContextVar is not a Mapping.

-- 
--Guido van Rossum (python.org/~guido)
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Showing content from https://mail.python.org/pipermail/python-dev/2018-January/151618.html below:

[Python-Dev] PEP 567 v2