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ExtensionArray.Round method and tests #54582

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@andrewgsavage andrewgsavage commented Aug 16, 2023

This adds abstract round method in ExtensionOpsMixin to tell EA authors to implement round, and provides a round test.

@mroeschke mroeschke requested a review from jbrockmendel August 25, 2023 18:15
@mroeschke mroeschke added the ExtensionArray Extending pandas with custom dtypes or arrays. label Aug 25, 2023
@@ -1094,7 +1094,8 @@ def round(self, decimals: int = 0, *args, **kwargs) -> Self:
DataFrame.round : Round values of a DataFrame.
Series.round : Round values of a Series.
"""
return type(self)(pc.round(self._pa_array, ndigits=decimals))
result = pc.round(self._pa_array, ndigits=decimals)
return type(self)(result.cast(self._pa_array.type))
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Why is this cast needed?

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can you answer here

@andrewgsavage
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this is ready for review again

@kernstock
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Let's do this!

@mroeschke mroeschke requested a review from jbrockmendel April 23, 2024 17:58
@andrewgsavage
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poke @jbrockmendel

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This pull request is stale because it has been open for thirty days with no activity. Please update and respond to this comment if you're still interested in working on this.

@github-actions github-actions bot added the Stale label Jun 17, 2025
@@ -866,6 +866,7 @@ Sparse

ExtensionArray
^^^^^^^^^^^^^^

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looks like accidental

@jbrockmendel
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Couple small comments, otherwise LGTM. Thanks for your patience.

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BUG: Series.round() expects ExtensionArray.round() to be implemented
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