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On 5 January 2018 at 11:06, Victor Stinner <victor.stinner@gmail.com> wrote:
\>> Le 5 janv. 2018 11:42 AM, "Paul Moore" <p.f.moore@gmail.com> a écrit :
\>> """
>> A Context is a mapping from ContextVar objects to their values. The
\>> Context itself exposes the Mapping interface, so cannot be modified
\>> directly - to modify the value associated with a variable you need to
\>> use the ContextVar.set() method.
\>> """
\>>
\>> Does that explain things correctly? One thing I am sure of is that we
\>> should remove "implemented using an immutable dictionary" - it's an
\>> implementation detail, and adds nothing but confusion to mention it
\>> here.

> You can only modify a context when it's the current context, so using
\> ContextVar.set() in Context.run().

Thanks. That's a useful qualification. But it may be too detailed for
the summary - it's certainly something that should be covered in the
specification section, though. Maybe "... you need to use the
ContextVar.set() method from Context.run()" would be OK, although I
don't want the summary to get too long.