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45 lines
1.0 KiB
45 lines
1.0 KiB
"""
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File: queue.py
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Created Time: 2022-11-29
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Author: Peng Chen (pengchzn@gmail.com)
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"""
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import os.path as osp
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import sys
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sys.path.append(osp.dirname(osp.dirname(osp.abspath(__file__))))
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from include import *
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""" Driver Code """
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if __name__ == "__main__":
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""" 初始化队列 """
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# 在 Python 中，我们一般将双向队列类 deque 看左队列使用
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# 虽然 queue.Queue() 是纯正的队列类，但不太好用，因此不建议
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que = collections.deque()
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""" 元素入队 """
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que.append(1)
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que.append(3)
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que.append(2)
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que.append(5)
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que.append(4)
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print("队列 que =", que)
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""" 访问队首元素 """
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front = que[0];
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print("队首元素 front =", front);
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""" 元素出队 """
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pop = que.popleft()
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print("出队元素 pop =", pop)
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print("出队后 que =", que)
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""" 获取队列的长度 """
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size = len(que)
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print("队列长度 size =", size)
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""" 判断队列是否为空 """
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is_empty = len(que) == 0
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print("队列是否为空 =", is_empty)
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