(1)建立雙向佇列:
import collections
d = collections.deque(
)
import collections
d = collections.deque()1
)2)print
(d)#輸出:deque([1, 2])
import collections
d = collections.deque()1
)2)print
(d)#輸出:deque([2, 1])
(4)clear(清空佇列)
import collections
d = collections.deque()1
)d.clear(
)print
(d)#輸出:deque()
(5)copy(淺拷貝)
import collections
d = collections.deque()1
)new_d = d.copy(
)print
(new_d)
#輸出:deque([1])
(6)count(返回指定元素的出現次數)
import collections
d = collections.deque()1
)1)print
(d.count(1)
)#輸出:2
(7)extend(從佇列右邊擴充套件乙個列表的元素)
import collections
d = collections.deque()1
)d.extend([3
,4,5
])print
(d)#輸出:deque([1, 3, 4, 5])
(8)extendleft(從佇列左邊擴充套件乙個列表的元素)
import collections
d = collections.deque()1
)d.extendleft([3
,4,5
])print
(d)#
# #輸出:deque([5, 4, 3, 1])
(9)index(查詢某個元素的索引位置)
import collections
d = collections.deque(
)d.extend(
['a'
,'b'
,'c'
,'d'
,'e'])
print
(d)print
(d.index(
'e')
)print
(d.index(
'c',0,
3))#指定查詢區間
#輸出:deque(['a', 'b', 'c', 'd', 'e'])
# 4
# 2
(10)insert(在指定位置插入元素)
import collections
d = collections.deque(
)d.extend(
['a'
,'b'
,'c'
,'d'
,'e'])
d.insert(2,
'z')
print
(d)#輸出:deque(['a', 'b', 'z', 'c', 'd', 'e'])
(11)pop(獲取最右邊乙個元素,並在佇列中刪除)
import collections
d = collections.deque(
)d.extend(
['a'
,'b'
,'c'
,'d'
,'e'])
x = d.pop(
)print
(x,d)
#輸出:e deque(['a', 'b', 'c', 'd'])
(12)popleft(獲取最左邊乙個元素,並在佇列中刪除)
import collections
d = collections.deque(
)d.extend(
['a'
,'b'
,'c'
,'d'
,'e'])
x = d.popleft(
)print
(x,d)
#輸出:a deque(['b', 'c', 'd', 'e'])
(13)remove(刪除指定元素)
import collections
d = collections.deque(
)d.extend(
['a'
,'b'
,'c'
,'d'
,'e'])
d.remove(
'c')
print
(d)#輸出:deque(['a', 'b', 'd', 'e'])
(14)reverse(佇列反轉)
import collections
d = collections.deque(
)d.extend(
['a'
,'b'
,'c'
,'d'
,'e'])
d.reverse(
)print
(d)#輸出:deque(['e', 'd', 'c', 'b', 'a'])
(15)rotate(把右邊元素放到左邊)
import collections
d = collections.deque(
)d.extend(
['a'
,'b'
,'c'
,'d'
,'e'])
d.rotate(2)
#指定次數,預設1次
print
(d)#輸出:deque(['d', 'e', 'a', 'b', 'c'])
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