undefined 0.0.3

Simply a global object that act as undefined.

Undefined

Ever needed a global object that act as None but not quite ?

Like for example key-word argument for function, where None make sens, so you need a default value.

One solution is to create as singleton object:

mysingleton = object()

Though it becomes difficult to track the singleton across libraries, and teach users where to import this from.

It’s also relatively annoying use this singleton across library.

Introducing undefined:

>>> import undefined
>>> from undefined import Undefined
>>> undefined is Undefined
True

behavior

It work (for now) mostly like a singleton object, meaning it’s truth-y

>>> if undefined: print(True)
True

Casing ?

Because it is a module you can use it lowercase:

import undefined

Because it looks more like a keyword (None, True, False), you can use it upper case:

import undefined as Undefined

or

from undefined import Undefined

I tend to be torn between lowercase, for simplicity, and Uppercase.