18 lines
439 B
Python
18 lines
439 B
Python
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class Queue(object):
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def __init__(self):
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self.lhs = []
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self.rhs = []
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def enqueue(self, x):
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self.lhs.append(x)
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def dequeue(self):
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if self.rhs:
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return self.rhs.pop()
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while self.lhs:
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self.rhs.append(self.lhs.pop())
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if self.rhs:
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return self.rhs.pop()
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else:
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raise Exception("Attempting to remove an item from an empty queue")
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