code: def schedule_exception_in(secs, exception, target):
      
      schedule_exception_at(time.time() + secs, exception, target)
docs: schedule a greenlet receive an exception after a number of seconds
  
      :param secs: the number of seconds to wait before raising
      :type secs: int or float
      :param exception: the exception to raise in the greenlet
      :type exception: Exception
      :param target: the greenlet that should receive the exception
      :type target: greenlet