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			45 lines
		
	
	
		
			1.0 KiB
		
	
	
	
		
			Python
		
	
	
	
	
	
			
		
		
	
	
			45 lines
		
	
	
		
			1.0 KiB
		
	
	
	
		
			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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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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