Python ring buffer

ring_buffer.py

import numpy as np

class RingBuffer():
    "A 1D ring buffer using numpy arrays"
    def __init__(self, length):
        self.data = np.zeros(length, dtype='f')
        self.index = 0

    def extend(self, x):
        "adds array x to ring buffer"
        x_index = (self.index + 1) % self.data.size
        self.data[x_index] = x
        self.index = x_index

    def get(self):
        "Returns the first-in-first-out data in the ring buffer"
        idx = (self.index + np.arange(self.data.size)) % self.data.size
        return self.data[idx]

    def to_list(self):
        l = []
        for i in range(self.index, self.data.size):
            l.append(self.data[i])
        for i in range(0, self.index):
            l.append(self.data[i])
        return l
        
        
if __name__ == '__main__':
    my_buffer = RingBuffer(10)
    import time
    while True:
        for v in range(100):
            my_buffer.extend(v)
            print('Ring buffer looks like:')
            print(my_buffer.to_list())
            time.sleep(0.1)