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Revert "REF: back IntervalArray by a single ndarray (#37047)" #38024

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merged 1 commit into from
Nov 24, 2020
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Revert "REF: back IntervalArray by a single ndarray (#37047)" #38024

merged 1 commit into from
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jorisvandenbossche
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@jorisvandenbossche jorisvandenbossche commented Nov 23, 2020 •
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This reverts commit 9cb3723.

See discussion in #37047

@jbrockmendel can you give this a check? (there were already several conflicts)

@jorisvandenbossche jorisvandenbossche added this to the 1.2 milestone Nov 23, 2020
@jorisvandenbossche jorisvandenbossche added Interval Interval data type Refactor Internal refactoring of code labels Nov 23, 2020
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I'll take a look, tentatively looks OK.

By funny coincidence, I just got the first of the promised perf improvements working.

jreback
jreback requested changes Nov 24, 2020
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ok with the change back.

pandas/core/arrays/interval.py
left = left.astype(dtype.subtype)
right = right.astype(dtype.subtype)

# coerce dtypes to match if needed
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can you factor this out into a function (maybe_cast_inputs), this is crazy otherwise

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This is how it was before (I am just reverting / fixing conflicts). I prefer to keep this PR a clean revert, and do any other refactor as follow-up

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i c ok.

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jreback commented Nov 24, 2020

@jbrockmendel ok here?

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looks fine

@jreback jreback merged commit b19e47f into pandas-dev:master Nov 24, 2020
@jorisvandenbossche jorisvandenbossche deleted the revert-intervalarray-backing branch November 24, 2020 19:13
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I just got the first of the promised perf improvements working.

Do you have a branch for it that you can push? I am curious to see whether the principles of the speed-up also couldn't be applied to the "2 1D-arrays" model

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Do you have a branch for it that you can push? I am curious to see whether the principles of the speed-up also couldn't be applied to the "2 1D-arrays" model

shortly, i hope. The approach is to do self._combined.view("complex128") and then do set operations on that to avoid casting to object.

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I can imagine that an additional copy to create the combined array could still be worth it compared to casting to object

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