syntax help for bone properties

Coding Python Support
1

I am having trouble with syntax and could really use some help.

I have a simple bit of code that replaces all selected bones with a custom shape. This works great. (go to pose mode, select the bones to change, and run the script) You have to set the bone_object to be the name of the custom bone you wish to use.


import bpy

bone_object = bpy.data.objects["gzmo_custom"]

for ob in bpy.context.selected_pose_bones:    
    #ob.show_wire = True
    ob.custom_shape = bone_object

Now I need to set the bone property “show_wire” to True.
In the python console, I can type “bpy.context.object.data.bones.active.show_wire = True” to do this, but in the script it is not as simple as adding “ob.show_wire = True”

I see the difference is that show_wire uses bpy.object.data.bones, while custom_shape uses bpy.object.pose.bones, but I don’t know what to do with this info.

Thanks.

2

show_wire is a property of Bone (and EditBone), not PoseBone.

bpy.context.selected_pose_bones is a list of PoseBones. You need to enable show_wire on the corresponding bone / edit bone. custom_shape however is a PoseBone property.

i
mport bpy

bone_object = bpy.data.objects["gzmo_custom"]

for pbone in bpy.context.selected_pose_bones:    
    pbone.custom_shape = bone_object

    # maybe not the most elegant, but should work fine 
    pbone.id_data.data.bones[pbone.name].show_wire = True
3

Thank you, that works!

I knew of the edit bone and pose bone differences, but I couldn’t figure out how to access the data. Adding this to my notes for next time.

4

There’s also some info in the docs:
http://www.blender.org/api/blender_python_api_2_75_release/info_gotcha.html#editbones-posebones-bone-bones

5

Thanks for that too. That’s another bookmark for me to go through soon.