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Revert "DEPR: Deprecate returning a DataFrame in SeriesApply.apply_standard #55189

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merged 5 commits into from
Sep 19, 2023
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Revert "DEPR: Deprecate returning a DataFrame in SeriesApply.apply_standard #55189

merged 5 commits into from
Sep 19, 2023

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phofl
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@phofl phofl commented Sep 18, 2023 •
edited by mroeschke
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Reasons for reverting:

  • This was done for performance reasons, but this kills the use case to unpack nested data (lists for example)
  • The deprecation is poorly done (axis 1 does not emit a warning)
  • There is no documentation what users should do, this is necessary if we deprecate something for performance reasons

#52116

closes #55134

@phofl phofl added this to the 2.1.1 milestone Sep 18, 2023
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I'm okay with reverting this for now. Could you link any related open user issues (if available)?

Also might be worth adding a unit test for unpacking nested data with apply.

cc @topper-123

@mroeschke mroeschke added the Apply Apply, Aggregate, Transform, Map label Sep 19, 2023
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phofl commented Sep 19, 2023

Added a test and linked the issue in the top post

@mroeschke mroeschke merged commit 5d8cacd into pandas-dev:main Sep 19, 2023
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Thanks @phofl. This deprecation is probably highly relevant in the PDEP 13 discussion

@meeseeksmachine meeseeksmachine mentioned this pull request Sep 19, 2023
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meeseeksmachine pushed a commit to meeseeksmachine/pandas that referenced this pull request Sep 19, 2023
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Backport PR pandas-dev#55189: Revert "DEPR: Deprecate returning a Dat…
488face 
…aFrame in SeriesApply.apply_standard
@phofl phofl deleted the revert_apply_dataframe branch September 19, 2023 22:41
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phofl commented Sep 19, 2023

yep agree

hedeershowk pushed a commit to hedeershowk/pandas that referenced this pull request Sep 20, 2023
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Revert "DEPR: Deprecate returning a DataFrame in SeriesApply.apply_st…
a226527 
…andard (pandas-dev#55189)

* Revert "DEPR: Deprecate returning a DataFrame in SeriesApply.apply_standard (pandas-dev#52123)"

This reverts commit fe415f5

* Fix tests

* Add whatsnew

* Add whatsnew

* Add test
lithomas1 pushed a commit that referenced this pull request Sep 20, 2023
@meeseeksmachine @phofl
Backport PR #55189 on branch 2.1.x (Revert "DEPR: Deprecate returning…
21d8cdd 
… a DataFrame in SeriesApply.apply_standard) (#55205)

Backport PR #55189: Revert "DEPR: Deprecate returning a DataFrame in SeriesApply.apply_standard

Co-authored-by: Patrick Hoefler <61934744+phofl@users.noreply.github.com>
@jrbourbeau jrbourbeau mentioned this pull request Sep 25, 2023
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@lithomas1 lithomas1 lithomas1 approved these changes

@mroeschke mroeschke mroeschke approved these changes

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Successfully merging this pull request may close these issues.

ENH: Don't remove the ability to expand a Series to a DataFrame by applying a function that returns Series
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