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			40 lines
		
	
	
		
			918 B
		
	
	
	
		
			Python
		
	
	
	
	
	
			
		
		
	
	
			40 lines
		
	
	
		
			918 B
		
	
	
	
		
			Python
		
	
	
	
	
	
"""
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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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    # 初始化队列
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    # 在 Python 中,我们一般将双向队列类 deque 看作队列使用
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    # 虽然 queue.Queue() 是纯正的队列类,但不太好用
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    que: deque[int] = 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: int = 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: int = 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: int = 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: bool = len(que) == 0
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    print("队列是否为空 =", is_empty)
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