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  1. Apache Arrow
  2. ARROW-6926

[Python] Support __sizeof__ protocol for Python objects

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      It would be helpful if PyArrow objects implemented the `_sizeof_` protocol to give other libraries hints about how much data they have allocated. This helps systems like Dask, which have to make judgements about whether or not something is cheap to move or taking up a large amount of space.

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            jorisvandenbossche Joris Van den Bossche
            mrocklin Matthew Rocklin
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