ring_buffer.py

gistfile1.py

from collections import deque


class RingBuffer(deque):

    def __init__(self, size):

        deque.__init__(self)
        self.size = size

    def append(self, value):

        if len(self) == self.size:
            self.popleft()
        deque.append(self, value)

    def get(self, index=None):

        if index == None:
            return list(self)
        else:
            return list(self)[index]


if __name__ == '__main__':
    size = 5
    ring = RingBuffer(size)
    for x in range(10):
        ring.append(x)

    print ring.get()