[Python-ideas] Optional parameters without default value

[Matthias Bussonnier]

On Thu, Mar 2, 2017 at 9:13 PM, Mike Miller <python-ideas at mgmiller.net> wrote:

>
> It is a built-in singleton so rarely known that you will almost never
> encounter code with it, so you'll have it all to yourself.  Even on a python
> mailing list, in a thread about sentinels/singletons, it will not be
> mentioned.  Some may "consider it unnatural."  It is…
>
> …
>
> … (hint)
>
> … (wait for it)
>
> …
>

<3 the suspens ! I got it before the end though !

I'll  tell you my secret as well. I have my own
(https://pypi.python.org/pypi/undefined)
I've set it up to raise on __eq__ or __bool__ to enforce checking for identity.

-- 
M