[Python-Dev] Pep 550 and None/masking (original) (raw)

Barry Warsaw barry at python.org
Mon Aug 28 12:26:54 EDT 2017

On Aug 28, 2017, at 11:50, Yury Selivanov <yselivanov.ml at gmail.com> wrote:

For checking if a context variable has a value in the topmost LC, we can add two new keyword arguments to the "ContextVar.lookup()" method:

ContextVar.lookup(*, default=None, topmost=False) If topmost is set to True, lookup will only check the topmost LC. For deleting a value from the topmost LC we can add a new "ContextVar.delete()" method.

+1

-Barry

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