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zhm-real
63 lines
1.3 KiB
Python
63 lines
1.3 KiB
Python
import collections
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import heapq
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class QueueFIFO:
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"""
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Class: QueueFIFO
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Description: QueueFIFO is designed for First-in-First-out rule.
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"""
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def __init__(self):
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self.queue = collections.deque()
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def empty(self):
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return len(self.queue) == 0
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def put(self, node):
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self.queue.append(node) # enter from back
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def get(self):
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return self.queue.popleft() # leave from front
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class QueueLIFO:
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"""
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Class: QueueLIFO
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Description: QueueLIFO is designed for Last-in-First-out rule.
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"""
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def __init__(self):
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self.queue = collections.deque()
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def empty(self):
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return len(self.queue) == 0
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def put(self, node):
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self.queue.append(node) # enter from back
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def get(self):
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return self.queue.pop() # leave from back
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class QueuePrior:
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"""
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Class: QueuePrior
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Description: QueuePrior reorders elements using value [priority]
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"""
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def __init__(self):
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self.queue = []
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def empty(self):
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return len(self.queue) == 0
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def put(self, item, priority):
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heapq.heappush(self.queue, (priority, item)) # reorder s using priority
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def get(self):
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return heapq.heappop(self.queue)[1] # pop out the smallest item
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def enumerate(self):
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return self.queue
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