Read Only version

[zee-sh]

How can I make this read-only and when you try to add an attribute it will raise an exception, something like a Frozen Addict.

Also why does this create an empty dict on when trying to access an attribute that does not exist. It should raise an exception unless you are setting an attribute that does not exist

[Ohjeah]

Had the same issue.
This works for me:

https://gist.github.com/Ohjeah/41b103e4bc15452af5bbc89747962369

[mewwts]

Hey!

Unfortunately, it's (afaik) not possible to get addicts functionality without creating an empty dictionary on lookup. Essentially, when you do my_dict.a.b = 2, Python first tries to figure out what my_dict.a.b is. If my_dict.a does not exist when __getattr__ is called on my_dict, Python will raise an exception. Hence, as a workaround, and tbh this is the whole idea that makes addict work, we return a empty dictionary, so that when the __setattr__ is called on my_dict.a we're able to do set the item in my_dict.

If I'm not misunderstanding the question you could always call .to_dict() in order to transform it into a regular python dict, and disallow further __setattr__.

Cheers,

Mats

[Ohjeah]

If you just use .to_dict() you will lose the dot-access to dict items too!

[mewwts]

That's true @Ohjeah.

[Ohjeah]

Hence the LockedDict (see the gist). It serves as a read only version of addict.Dict. Works well for me if I want an exception rather a None value return on a failed item lookup.