Re-assignable hotkey for toggling between Rest and Pose Mode for selected Armature.

RestPoseToggle.py

bl_info = {
    "name": "Toggle Armature Rest/Pose",
    "description": "Re-assignable hotkey for toggling between Rest and Pose Mode for selected Armature.",
    "author": "Ferdinand Joseph Fernandez",
    "version": (1, 0),
    "location": "Press Shift-Q while in 3d View, and in Pose Mode of an Armature",
    "support": "TESTING",
    "category": "Animation",
}

import bpy

def is_in_visible_layer(ob):
    ob_layers = ob.layers
    scene_layers = bpy.context.scene.layers
    
    for layer_index in range(len(ob_layers)):
        if ob_layers[layer_index] == True and scene_layers[layer_index] == True:
            return True
    
    return False

class RestPoseToggle(bpy.types.Operator):
    """Toggle Rest/Pose"""
    bl_idname = "animation.rest_pose_toggle"
    bl_label = "Toggle Rest/Pose"
    bl_options = {'REGISTER', 'UNDO'}
    
    def execute(self, context):
        ob = context.object
        
        if ob.type != 'ARMATURE':
            # Selected wasn't an armature.
            # Search whole scene for the first
            # armature that isn't hidden via the outliner,
            # and is in a layer that is currently visible.
            for scene_ob in bpy.context.scene.objects:
                if scene_ob.type != 'ARMATURE' or scene_ob.hide == True or is_in_visible_layer(scene_ob) == False:
                    continue
                
                ob = scene_ob
                break
        
        if ob.type == 'ARMATURE':
            armature = ob.data
            
            if armature.pose_position == 'POSE':
                armature.pose_position = 'REST'
            else:
                armature.pose_position = 'POSE'
                
        return {'FINISHED'}

# keymaps are stored here so they can be accessed after registration
rest_pose_toggle_addon_keymaps = []

def register():
    bpy.utils.register_class(RestPoseToggle)
    
    # hotkey registration
    wm = bpy.context.window_manager
    kc = wm.keyconfigs.addon

    if kc:
        keymap_pose_rest_pose_toggle = kc.keymaps.new(name='Pose', space_type='EMPTY')
        keymap_item_pose_rest_pose_toggle = keymap_pose_rest_pose_toggle.keymap_items.new("animation.rest_pose_toggle", 'Q', 'PRESS', shift=True)
        
        keymap_object_rest_pose_toggle = kc.keymaps.new(name='Object Mode', space_type='EMPTY')
        keymap_item_object_rest_pose_toggle = keymap_object_rest_pose_toggle.keymap_items.new("animation.rest_pose_toggle", 'Q', 'PRESS', shift=True)
        
        # add to list so we can unregister afterwards
        rest_pose_toggle_addon_keymaps.append((keymap_pose_rest_pose_toggle, keymap_item_pose_rest_pose_toggle))
        rest_pose_toggle_addon_keymaps.append((keymap_object_rest_pose_toggle, keymap_item_object_rest_pose_toggle))

def unregister():
    # unregister hotkey
    wm = bpy.context.window_manager
    
    kc = wm.keyconfigs.addon
    if kc:
        for km, kmi in rest_pose_toggle_addon_keymaps:
            #print("Removing hotkey %s" % (kmi.idname))
            km.keymap_items.remove(kmi)
            # note: don't remove km, as it may contain hotkeys of other add-ons!
            #kc.keymaps.remove(km)
    
    # clear the list
    #addon_keymaps.clear()
    del rest_pose_toggle_addon_keymaps[:]
    
    bpy.utils.unregister_class(RestPoseToggle)
    
    
    
if __name__ == "__main__":
    register()