search for unknown operator (bpy warning in custom script) [closed]

Question

I'm calling one of my operators within another operator. The code worked fine until I tried it on a new file.

search for unknown operator 'MYPLUG_OT_update_list'

I'll try to simplify the code here

class login(bpy.types.Operator):
    bl_idname = "myplug.login"
    bl_label = "Login"

    def execute(self,context):
        ....

        bpy.ops.myplugin.update_list()

        return {'FINISHED'}


class updateList(bpy.types.Operator):
    bl_idname = "myplug.update_list"
    bl_label = "UpdateList"

    def execute(self,context):
        ....
        return {'FINISHED'}

def register():
    bpy.utils.register_module(__name__)


def unregister():
    bpy.utils.unregister_module(__name__)

if __name__ == '__main__':
    register()

Any ideas? I'm debating whether I need to preregister the dependent Operator or call it with some other convention.

Answer 1

The message:

search for unknown operator "NAME_TYPE_shortname", "NAME_TYPE_shortname"

could come from the user preferences keyboard shortcuts manager.

• Registering an incorrectly spelled operator path will give that message.
• Adding the shortcut in your script before the operator is registered will give that error too.

Maybe this is a typo but your

class updateList(bpy.types.Operator):
    bl_idname = "myplug.update_list"

Would mean that the operator is located at bpy.ops.myplug.update_list(), not bpy.ops.myplugin.*

There is no inherent reason that operators can't be called within other operators, but you will have to wait for the called operator to complete before the calling operator can end, it doesn't fork off into its own thread.

for instance

import bpy

class login(bpy.types.Operator):
    bl_idname = "myplug.login"
    bl_label = "Login"

    def execute(self,context):
        ...

        # bpy.ops.myplug.update_list()  # should be.  
        bpy.ops.myplugin.update_list()

        return {'FINISHED'}


class updateList(bpy.types.Operator):
    bl_idname = "myplug.update_list"
    bl_label = "UpdateList"

    def execute(self,context):
        print('caramba!')
        return {'FINISHED'}

def register():
    bpy.utils.register_module(__name__)


def unregister():
    bpy.utils.unregister_module(__name__)

if __name__ == '__main__':
    register()
    bpy.ops.myplug.login()


# AttributeError: Calling operator "bpy.ops.myplugin.update_list" error, could not be found

If you are calling a set of operators in sequence, then of course you must ensure that the operators are registered globally. If i'm not mistaken the bpy.utils.register_module(__name__) will register classes in order of appearance in the file, use that order to your advantage.