Hi,

I have prepared a PEP proposing adding a stdlib function for defining sentinel values. You can find the PEP here:

https://www.python.org/dev/peps/pep-0661/

The discussion is happening in the discourse server:

https://discuss.python.org/t/pep-661-sentinel-values/9126

To avoid splitting the discussion, *please redirect your comments there* instead of replying to this thread.

Have a nice week,