具有两个优先级 Python 的优先级队列 [英] Priority Queue with two Priorities Python

问题描述

我正在寻找一种允许我给出两个优先级的优先级队列.我希望它只检查第一个值然后检查第二个值这是一些代码

I'm searching for a kind of priority queue which allows me to give two priorites. I want that it just check for the first value then for the second one Here is some Code

import Queue

class Job(object):
    def __init__(self, fpriority, spriority, description, iata , hops, cost):
        self.fpriority = fpriority
        self.spriority = spriority

q = Queue.PriorityQueue()

q.put(Job(2, 5, 'Mid-level job'))
q.put(Job(2, 20, 'Low-level job'))
q.put(Job(1, 20, 'Important job'))

现在我想要元素的以下顺序

now i want the following order of the elements

Important job
Mid_level job
Low_level job

如何用一个队列创建这样的订单?

how can i create such an order with one queue?

推荐答案

class Job(object):
    def __init__(self, fpriority, spriority, description, iata , hops, cost):
        self.fpriority = fpriority
        self.spriority = spriority

    def __cmp__(self, other):
        '''Comparisons for Python 2.x - it's done differently in 3.x'''
        if self.fpriority > other.fpriority:
            return 1
        elif self.fpriority < other.fpriority:
            return -1
        else:
            if self.spriority > other.spriority:
                return 1
            elif self.spriority < other.spriority:
                return -1
            else:
                return 0

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