Toggle 'deform' bone property for all selected bones I'm a total beginner at coding and I'm having some troubles with my first script.

I copied the main structure from a script that toggles layer visibility for some bones from a rigging course I did at IHMAN 3D School. Now I'm trying to tweak it to fit my needs.

Aside from a quicker access to some Armature functions via Toolshelf, I want to be able to set all the selected bones to Deform=True/False at once with a button. I marked the line I wrote to accomplish this.

The script as is now goes as follows:

 import bpy

 class dwarfButtons(bpy.types.Panel):


    bl_space_type = "VIEW_3D"
    bl_region_type = "TOOLS"
    bl_category = "Rigging"
    bl_label = "Dwarf Rig Layers"

    @classmethod
    def poll(self,context):
        if(bpy.context.active_object.type == 'ARMATURE'):
            return(True)

    def draw(self,context):
        layout = self.layout
        row = layout.row()

        row.label("Edit/Display options:")
        row = layout.row()
        row.prop(context.active_object.data, "use_mirror_x", toggle=True, text="edit: x mirror")
        row = layout.row()
        row.prop(context.active_object.data, "show_names", toggle=True, text="names")
        row = layout.row()
        row.prop(context.active_object.data, "show_bone_custom_shapes", toggle=True, text="shapes")
        row = layout.row()
        row.prop(context.active_object.data, "show_axes", toggle=True, text="axe display")
        row = layout.row()
        row.prop(context.active_object, "show_x_ray", toggle=True, text="xRay")
        row = layout.row()
        row.prop(context.selected_bones, "use_deform", toggle=True, text="Deform OFF") #THIS LINE



def register():
    bpy.utils.register_class(dwarfButtons)

def unregister():
    bpy.utils.unregister_class(dwarfButtons)


if __name__=="__main__":
    register()


I don't totally know what I'm doing yet. I discovered what functions to call trough the info panel and quick searches through the Python API.
In edit mode select the bones you want to change and press ShiftW (on windows) and you get "Toggle Bone Options" -popup. There you can alter the deform option for all the bones selected.

Tested with Blender 2.75