How can I implement a custom comparator for a priority queue?

How can I implement a custom comparator for a priority queue?

You can implement a custom comparator by defining a comparison function that determines the order of elements.

Can you show me an example in Python?

Sure! You can use the heapq module along with a custom comparator like this:

import heapq

class CustomComparator:
    def __init__(self, value):
        self.value = value

    def __lt__(self, other):
        return self.value < other.value  # Define your custom logic here

priority_queue = []
heapq.heappush(priority_queue, CustomComparator(5))
heapq.heappush(priority_queue, CustomComparator(1))

while priority_queue:
    print(heapq.heappop(priority_queue).value)

What if I want to prioritize based on multiple criteria?

You can modify the __lt__ method in your comparator to compare multiple attributes. Just ensure the logic reflects your prioritization needs.

Thanks! This is really helpful.