[Python-ideas] Fwd: Define a method or function attributeoutsideof a class with the dot operator

M.-A. Lemburg mal at egenix.com
Mon Feb 13 15:12:13 EST 2017

On 13.02.2017 20:32, Joseph Hackman wrote:
> I just wanted to ask: can someone point me to the reason Python doesn't support referencing a class inside it's own definition? It seems like that would solve some of the cases discussed here, and with Type hinting that seems like something that maybe should be considered?

The class doesn't exist yet, while Python is running the code
in its definition block.

You can play some tricks with meta classes exposing a .__prepare__()
method. This will receive the name of the to-be-created class
and allows returning a custom namespace in which the code is


The meta class docs have more details on how all this works:


Marc-Andre Lemburg

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