On 12/12/2019 5:05 AM, Arthur Pastel wrote:
On Thu, Dec 12, 2019 at 2:03 AM Eric V. Smith <e...@trueblade.com <mailto:e...@trueblade.com>> wrote:

    On 12/11/2019 6:36 PM, Arthur Pastel wrote:
    >> Add an extra hidden attribute to every instance just
    >> to track whether you’re inside __post_init__ so __setattr__ can
    check it?
    I don't want to add attributes that weren't defined in the class
    definition.

Would it be okay if we create an instance attribute before calling the __init__ and then we remove it after the __post_init__ ? Then we would simply have to check for the attribute existence when checking if we raise a FrozenInstanceError.

That wouldn't work if the class used __slots__.

Eric


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