<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _runable_for_event(f, tag, stage):
 """Loot at the event property for a function to see if it should be run at this stage. """


    if not hasattr(f, '__ambry_event__'):
        return False

    f_tag, f_stage = f.__ambry_event__

    if stage is None:
        stage = 0

    if tag != f_tag or stage != f_stage:
        return False

    return True