# -*- coding: utf-8 -*-
# collections1.py

import collections as cln

ldeque = cln.deque()
for i in range(5):
  ldeque.append(i)
print(ldeque)

b = ldeque.pop()
print(b, ldeque)

ldeque = cln.deque()
for i in range(5):
  ldeque.appendleft(i)
print(ldeque)
b = ldeque.popleft(); print(b, ldeque)



ldeque.appendleft(4); print(ldeque) # 원래대로 [4,3,2,1,0]
ldeque.rotate(2); print(ldeque)
ldeque.rotate(-2); print(ldeque)