human
Solve the following python programming problem given the following code:
def get_extra_view_menu_items(self) : 
    'Method returns list of items for sitetree mechanism.' 
    items = defaultdict (list) 
    def get_item(model, view, change_view = False) : 
        url = view.url_with_namespace 
        if change_view : 
            url += ' object.id' 
return { 
            'title' : view.label, 
            'url' : url, 
} 
for (model, model_admin) in self._registry.items () : 
        name = '{}_{}'.format (get_item._meta.app_label, model._meta.model_name) 
        for view in (model_admin.list_views or []) : 
            items [name].append (get_item (model, view)) 
for view in (model_admin.change_views or []) : 
            items [name].append (get_item (model, view, True)) 
return items 

    
    

    Fix the buggy line: name = '{}_{}'.format (get_item._meta.app_label, model._meta.model_name)
assistant
#Here is Python code to fix the buggy line: name = '{}_{}'.

name = '{}_{}'.format (model._meta.app_label, model._meta.model_name)