3 ˆd ã@sBddlmZddlmZdd„Zdedœdd„Zdd œd d „Zd S) é)Úadd_or_remove_notifiers)Ú compile_exprcCs ||ƒdS)aW Dispatch an event handler on the same thread. Parameters ---------- handler : callable(event) User-defined callable to handle change events. ``event`` is an object representing the change. Its type and content depends on the change. event : object The event object to be given to handler. N©)ÚhandlerÚeventrrú s