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40 lines
903 B
Python
40 lines
903 B
Python
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# Python code to demonstrate working of
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# extend(), extendleft(), rotate(), reverse()
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# importing "collections" for deque operations
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import collections
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# initializing deque
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de = collections.deque([1, 2, 3,])
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# using extend() to add numbers to right end
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# adds 4,5,6 to right end
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de.extend([4,5,6])
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# printing modified deque
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print ("The deque after extending deque at end is : ")
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print (de)
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# using extendleft() to add numbers to left end
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# adds 7,8,9 to right end
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de.extendleft([7,8,9])
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# printing modified deque
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print ("The deque after extending deque at beginning is : ")
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print (de)
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# using rotate() to rotate the deque
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# rotates by 3 to left
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de.rotate(-3)
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# printing modified deque
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print ("The deque after rotating deque is : ")
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print (de)
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# using reverse() to reverse the deque
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de.reverse()
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# printing modified deque
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print ("The deque after reversing deque is : ")
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print (de)
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