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# Python code to demonstrate working of
# extend(), extendleft(), rotate(), reverse()
# importing "collections" for deque operations
import collections
# initializing deque
de = collections.deque([1, 2, 3])
# using extend() to add numbers to right end
# adds 4,5,6 to right end
de.extend([4, 5, 6])
# printing modified deque
print("The deque after extending deque at end is : ")
# using extendleft() to add numbers to left end
# adds 7,8,9 to right end
de.extendleft([7, 8, 9])
# printing modified deque
print("The deque after extending deque at beginning is : ")
# using rotate() to rotate the deque
# rotates by 3 to left
de.rotate(-3)
# printing modified deque
print("The deque after rotating deque is : ")
# using reverse() to reverse the deque
de.reverse()
# printing modified deque
print("The deque after reversing deque is : ")
# get right-end value and eliminate
startValue = de.pop()
print("The deque after popping value at end is : ")
# get left-end value and eliminate
endValue = de.popleft()
print("The deque after popping value at start is : ")
# eliminate element searched by value
de.remove(5)
print("The deque after eliminating element searched by value : ")

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