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Ring buffer implementation for numpy

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Ring (aka circular) buffers backed by a numpy array, supporting:

  • Operations from collections.deque
  • b.append(val)
  • b.appendleft(val)
  • b.extend(val)
  • b.extendleft(val)
  • b.pop(val)
  • b.popleft(val)
  • The collections.Sequence protocol (unoptimized)
  • C-side unwrapping into an array with np.array(b)
  • Arbitrary element dtypes, including extra dimensions like RingBuffer(N, dtype=(int, 3))

For example:

import numpy as np
from numpy_ringbuffer import RingBuffer

r = RingBuffer(capacity=4, dtype=np.bool)
r.append(True)
r.appendleft(False)
print(np.array(r))  # array([False, True])

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