How to put items into priority queues?

Question

In the Python docs,

The lowest valued entries are retrieved first (the lowest valued entry is the one returned by sorted(list(entries))[0]

Answer 1

I made something like this to accomplish a FIFO similar to gfortune, but without the need of calling time.time() everywhere: (Python 3 only)

import time
from dataclasses import dataclass, field

@dataclass(order=True)
class PrioritizedItem:
    prio: int
    timestamp: float = field(init=False, default_factory=time.time)
    data: object = field(compare=False)

Now you can do:

import queue

item1 = PrioritizedItem(0, "hello world")
item2 = PrioritizedItem(0, "what ever")
q = queue.PriorityQueue()
q.put(item1)
q.put(item2)

And be sure, they will always be extracted in the same order.