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40 lines
930 B
40 lines
930 B
"""
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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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from collections import deque
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"""Driver Code"""
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if __name__ == "__main__":
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# 初始化佇列
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# 在 Python 中，我們一般將雙向佇列類別 deque 看作佇列使用
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# 雖然 queue.Queue() 是純正的佇列類別，但不太好用
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que: deque[int] = deque()
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# 元素入列
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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("佇列 que =", que)
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# 訪問佇列首元素
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front: int = que[0]
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print("佇列首元素 front =", front)
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# 元素出列
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pop: int = que.popleft()
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print("出列元素 pop =", pop)
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print("出列後 que =", que)
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# 獲取佇列的長度
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size: int = len(que)
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print("佇列長度 size =", size)
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# 判斷佇列是否為空
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is_empty: bool = len(que) == 0
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print("佇列是否為空 =", is_empty)
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