2
$\begingroup$

I have a kind of theoric question.

I've registered a PropertyGroup Class to the GreasePencil class/type, lets call it Property_A.

At the same time, this Property_A has Collection Property with different elements.

(So, I have an structure like):

a_grease_pencil_object.property_a.collection

My question is:

Having an element/instance of that collection, is it possible to know/get the original Grease Pencil where it is stored?

Some kind of tracing back where it belongs?

I'm new and Im not sure how bl_rna works, but maybe some kind of just getting the name of the Grease Pencil where the property is stored, so I can get it via bpy.data.grease_pencils[name]?

(I need this since for some methods, I accesed the Grease Pencil by the active Grease Pencil. But now I have to loop over all the grease pencils (using bpy.data.grease_pencils to change different things, and since those methods use the active GP, they dont work. So Im looking to replace that code for the thing Im asking).

Edit: Reformulating my question (maybe in a simpler way), I want to kind of get the data path of a property

So if I have element_zero = a_grease_pencil_object.property_a.collection[0]

somekind of method that could make something like:

element_zero.get_data_path()

And I get kind of:

bpy.data.grease_pencils["GPencil.011"].property_a.collection

So I know that I could get the name of the Grease Pencil object where it is from.

Thank you so much for the help, much appreciated!

Improve this question
$\endgroup$

1 Answer 1

Reset to default
3
$\begingroup$

You can very simply use repr(prop), or in your case repr(element_zero). This will return a string with the full data path from bpy.

From the repr documentation :

Return a string containing a printable representation of an object. For many types, this function makes an attempt to return a string that would yield an object with the same value when passed to eval(); otherwise, the representation is a string enclosed in angle brackets that contains the name of the type of the object together with additional information often including the name and address of the object. A class can control what this function returns for its instances by defining a repr() method. If sys.displayhook() is not accessible, this function will raise RuntimeError.

If you want access to the base ID object (ie the grease pencil object) holding the property, you can use prop.id_data. See the docs for bpy.types.Struct.id_data.

Improve this answer
$\endgroup$
2
  • $\begingroup$ Both options does exactly what I wanted! And I can't believe I wasn't aware of id_data until you pointed it. Thank you so much for the help friend, much appreciated! $\endgroup$ Commented Aug 22, 2023 at 19:36
  • 1
    $\begingroup$ @Ommadawn hehe always a pleasure to answer well documented and thought out questions. I still discover new things and tricks every day ! Cheers $\endgroup$ Commented Aug 22, 2023 at 19:48

You must log in to answer this question.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.