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27 lines
557 B
Python
27 lines
557 B
Python
class Queue(object):
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"""实现一个队列"""
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def __init__(self, length = 20):
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self.list = []
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self.__length = length
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def enqueue(self, elem):
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"""入队"""
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if self.size() > self.__length:
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self.dequeue()
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self.list.append(elem)
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else:
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self.list.append(elem)
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def dequeue(self):
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"""出队"""
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return self.list.pop(0)
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def is_empty(self):
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return not self.list
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def size(self):
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"""队列的大小"""
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return len(self.list)
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