code: def process(self, sched, coro):
          
  
          if self.prio == priority.DEFAULT:
              self.prio = sched.default_priority
docs: This is called when the operation is to be processed by the
          scheduler. Code here works modifies the scheduler and it's usualy
          very crafty. Subclasses usualy overwrite this method and call it from
          the superclass.