I am creating many boolean properties and want to be able to control the properties with a single worker function. The property name will be the logic driver. Is this possible? If so how? Or do I need to create a function for each property?

import bpy
from bpy.props import BoolProperty

def worker_func(self, context):
    r""" How to get the name of the envoked property"""
    print (self.name) #??
        if prop_a:
            do stuff for prop_a
        if prop_b:
            do stuff for prop_b
        if prop_c:
            do stuff for prop_c

bpy.types.Scene.prop_a = BoolProperty( update = worker_func )
bpy.types.Scene.prop_b = BoolProperty( update = worker_func )
bpy.types.Scene.prop_c = BoolProperty( update = worker_func )

class HelloWorldPanel(bpy.types.Panel):
    bl_label = "Hello"
    bl_idname = "OBJECT_PT_hello"
    bl_space_type = 'VIEW_3D'
    bl_region_type = 'UI'

    def draw(self, context):
        layout = self.layout
        layout.prop(context.scene, "prop_a", text="a")
        layout.prop(context.scene, "prop_b", text="b")
        layout.prop(context.scene, "prop_c", text="c")

def register():

def unregister():

if __name__ == "__main__":

Thanks you very much. A.Kal


The update method only gets the reference to the ID-block who owns the property and the context passed. So you have to create a function for each property individually.

You can do this dynamically

import bpy

def callback(scene, prop):
    print("Property '%s' of %s updated to value %s" % (prop, scene.name, getattr(scene, prop)))

def create_update_func(prop):
    def update(self, context):
        callback(self, prop)
    return update

bpy.types.Scene.prop_a = bpy.props.BoolProperty(update=create_update_func("prop_a"))
bpy.types.Scene.prop_b = bpy.props.BoolProperty(update=create_update_func("prop_b"))
bpy.types.Scene.prop_c = bpy.props.BoolProperty(update=create_update_func("prop_c"))
  • $\begingroup$ That's pretty clever! $\endgroup$ – TLousky Oct 7 '15 at 8:16
  • 1
    $\begingroup$ or update=lambda self, context: some_func(self, context, 'a') $\endgroup$ – zeffii Feb 28 '17 at 14:08
  • $\begingroup$ Stumbled here by chance, but @zeffii thats precisely what I've been using since I started coding props. :-) Do you know any drawbacks to this method? I just used it as it seemed the fastest way to do it. $\endgroup$ – Teck-freak Nov 28 '17 at 8:52
  • $\begingroup$ @Teck-freak not really, it was ideasman (one of Blender's head developers) who proposed the lambda approach. I also like it because it's concise. $\endgroup$ – zeffii Nov 30 '17 at 14:21

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.