title: PyPy and efficient arrays
body: <p>My project currently uses NumPy, only for memory-efficient arrays (of bool_, uint8, uint16, uint32).</p>
  
  <p>I'd like to get it running on PyPy which doesn't support NumPy. (failed to install it, at any rate)</p>
  
  <p>So I'm wondering: Is there any other memory-efficient way to store arrays of numbers in Python? Anything that is supported by PyPy? Does PyPy have anything of it's own?</p>
  
  <p>Note: array.array is not a viable solution, as it uses a lot more memory than NumPy in my testing.</p>