1
$\begingroup$

I would like to start developing in the new beta build environment. For that, I want to register classes the new way: https://wiki.blender.org/wiki/Reference/Release_Notes/2.80/Python_API/Addons

However, I get the following error:

TypeError: 'type' object is not iterable

Also, when trying "help(bpy.utils.register_class_factory())" in the inteactive python console, I get:

AttributeError: module 'bpy.utils' has no attribute 'register_class_factory'

Some simplified code I am "working" on right now:

import bpy

class MakeProxy(bpy.types.Operator):
    bl_idname = "OBJECT_OT_object_make_proxy"
    bl_label = "mProxy"

    "more code"

classes = (
    MakeProxy
    )

register, unregister = bpy.utils.register_classes_factory(classes)

What am I missing? Thank you!

$\endgroup$
1
$\begingroup$
import bpy

class OBJECT_OT_object_make_proxy(bpy.types.Operator):
    """Tooltip"""
    bl_idname = "object.make_proxy"
    bl_label = "Make Proxy"

    @classmethod
    def poll(cls, context):
        return context.active_object is not None

    def execute(self, context):
        pass # More code here
        return {'FINISHED'}

classes = (
            OBJECT_OT_object_make_proxy,

          )

register, unregister = bpy.utils.register_classes_factory(classes)


if __name__ == "__main__":
    register()

This works.

I do not understand what they mean to say about the new naming conventions here. Browsing the web it seems I am not the only one.

It says:

This constraint applies to the bl_idname of each class (or the class name which uses it if no bl_idname is defined in the class).

These are: UPPER_CASE_{SEPARATOR}_mixed_case, in the case of a menu the regular expression is:

[A-Z][A-Z0-9_]*MT[A-Za-z0-9_]+

The separator for each class is listed below:

Header -> HT
Menu -> MT
Operator -> OT
Panel -> PT
UIList -> UL

Valid Examples:

OBJECT_OT_fancy_tool
SOME_HEADER_HT_my_header
PANEL123_PT_myPanel (lower case is preferred but mixed case is supported).

At the time of writing this, names that don't conform to this convention will produce a warning on startup. Eventually we will make this into an error, eg:

Warning: 'Oscurart Files Tools' doesn't contain 'PT' with prefix & suffix Warning: 'Oscurart Overrides' doesn't contain 'PT' with prefix & suffix Warning: 'Oscurart Animation Tools' doesn't contain 'PT' with prefix & suffix

So this might mean that the bl_idname should actually be something like "object.MY_ADDON_OT_some_object_operator" It still requires a '.' to be there so object.OBJECT_OT_something_something does not seem to make much sense to me. Let's make this a new question as well, maybe someone else knows.

$\endgroup$
  • $\begingroup$ Okay, although I dont yet onehundred percent understand why it works, it does not throw any errors on compilation anymore. I am hoping for more clarification in the other question. However: I am not able to call my function from the "spacebar - search - window", as I was able to in 2.79. Any thoughts on that, maybe? Please? :) $\endgroup$ – morph3us Dec 2 '18 at 14:58
  • $\begingroup$ The way I understand it, what was wrong in your script were two things: bl_idname requires a '.' character to be in it, and the arguement for bpy.utils.register_classes_factory() needs to be iterable, so you need a comma after the value you assign to it or to make it a list first you could do classes = list() followed by classes.append(some_single_class) if you wanted a list with a single element. If you search for what you have in bl_label while poll() returns true, you should find the operator with the search. $\endgroup$ – Martin Z Dec 2 '18 at 15:22
  • $\begingroup$ Yes, you are right, I just copied your exact script, rather than just trying to fix mine and yours works. So I am doing something wrong, obviously. Thank you so much for your time! $\endgroup$ – morph3us Dec 2 '18 at 15:44

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.