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  1. Prepare
  2. Python
  3. Collections
  4. Collections.deque()
  5. Discussions

Collections.deque()

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645 Discussions

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  • fazepavan
     + 0 comments
    from collections import deque
n = int(input())
d = deque()
for n in range(n):
    cmd = input().split()
    operation = cmd[0]
    if operation == "append":
        d.append(int(cmd[1]))
    elif operation == "appendleft":
        d.appendleft(int(cmd[1]))
    elif operation == "pop":
        d.pop()
    elif operation == "popleft":
        d.popleft()
        
print(*d)

  • vmmulik
     + 0 comments

    Here is my code

    from collections import deque

q = deque()
for _ in range( int(input()) ):
    operation, *value = input().split()
    # print(operation, value)
    method = getattr(q, operation)
    method(*value)

print(*q)

  • luozhe2014
     + 0 comments

    from collections import deque n = int(input()) d = deque() for i in range(n): command,*args = input().split() if args: getattr(d,command)(int(args[0])) else: getattr(d,command)() print(' '.join(map(str,d)))

  • singhshrajan
     + 0 comments

    from collections import deque

    1. n = int(input())
    2. d = deque()
    3. for i in range(n):
    4. i = list(input().split())
    5. if (i[0]=="pop"):
    6. d.pop()
    7. elif(i[0]=="popleft"):
    8. d.popleft()
    9. else:
    10. x = i.pop(1)
    11. fun = getattr(d,i[0])
    12. fun(x)
    13. print(" ".join(d))

  • AbigailMiller0
     + 0 comments

    The fact that they’re memory efficient while maintaining great performance is another reason why they're a go-to in many scenarios. Definitely worth exploring the deque methods and recipes for anyone working with Python, 11winner register