pandas-dev/pandas issues and pull requests

#62520 - BUG: Regression in Series.pow with all-NA `double[pyarrow]` values in pandas 3.x

Issue - State: closed - Opened by TomAugspurger about 2 months ago - 7 comments
Labels: Bug, Regression, Numeric Operations, good first issue, Arrow

#62462 - BUG: cannot use index to set values in `.iloc` for `Int64[pyarrow]` Series

Issue - State: closed - Opened by MarcoGorelli about 2 months ago - 2 comments
Labels: Bug, Indexing, Regression, Arrow

#61399 - BUG: round on object columns no longer raises a TypeError

Pull Request - State: closed - Opened by KevsterAmp 7 months ago - 6 comments
Labels: Bug, Regression, Numeric Operations

#61399 - BUG: round on object columns no longer raises a TypeError

Pull Request - State: closed - Opened by KevsterAmp 7 months ago - 4 comments
Labels: Bug, Regression, Numeric Operations

#61361 - REGR: Fix signature of GroupBy.expanding

Issue - State: closed - Opened by rhshadrach 7 months ago - 4 comments
Labels: Bug, Groupby, Regression, Blocker, Window

#61320 - PERF: Restore old performances with .isin() on columns typed as np.ui…

Pull Request - State: closed - Opened by pbrochart 7 months ago - 2 comments
Labels: Performance, Regression, isin

#61320 - PERF: Restore old performances with .isin() on columns typed as np.ui…

Pull Request - State: closed - Opened by pbrochart 7 months ago - 3 comments
Labels: Performance, Regression, isin

#61206 - BUG: round on object columns no longer raises a TypeError

Issue - State: closed - Opened by MT407 8 months ago - 4 comments
Labels: Bug, Regression, Error Reporting, Numeric Operations

#61183 - REGR: Interpolate with method=index

Pull Request - State: closed - Opened by rhshadrach 8 months ago - 1 comment
Labels: Bug, Missing-data, Regression

#61183 - REGR: Interpolate with method=index

Pull Request - State: closed - Opened by rhshadrach 8 months ago - 2 comments
Labels: Bug, Missing-data, Regression

#61122 - BUG: ``Series.interpolate`` regression in latest Pandas 3.0.0 nightly (method 'linear' behaves like 'index')

Issue - State: closed - Opened by theOehrly 8 months ago - 7 comments
Labels: Bug, Missing-data, Regression, Blocker

#60870 - PERF: Regression in groupby ops from adding skipna

Issue - State: closed - Opened by rhshadrach 10 months ago - 2 comments
Labels: Groupby, Missing-data, Performance, Regression

#60816 - BUG: Union of two DateTimeIndexes is incorrectly calculated

Issue - State: open - Opened by filmor 10 months ago - 5 comments
Labels: Bug, Regression, Needs Discussion, Non-Nano

#59999 - REGR: groupby.value_counts with all NA values

Pull Request - State: open - Opened by rhshadrach about 1 year ago
Labels: Bug, Groupby, Regression, Algos

#59999 - REGR: groupby.value_counts with all NA values

Pull Request - State: closed - Opened by rhshadrach about 1 year ago - 1 comment
Labels: Bug, Groupby, Regression, Algos

#59960 - BUG: Plotting bug in Pandas 2.2.2 and 2.2.3

Issue - State: closed - Opened by jlchang about 1 year ago - 5 comments
Labels: Bug, Visualization, Regression, Closing Candidate

#58288 - Potential regression induced by commit 1ee5832

Issue - State: closed - Opened by rhshadrach over 1 year ago - 2 comments
Labels: IO Data, Performance, Regression

#58287 - Potential regression induced by commit 9cd5e55

Issue - State: open - Opened by rhshadrach over 1 year ago
Labels: Performance, Regression

#58286 - Potential regression induced by commit eb55bca

Issue - State: closed - Opened by rhshadrach over 1 year ago - 2 comments
Labels: Performance, Regression, Timedelta

#58285 - Potential regression induced by commit 924f246

Issue - State: open - Opened by rhshadrach over 1 year ago
Labels: Performance, Output-Formatting, Regression

#58145 - REGR: from_records not initializing subclasses properly

Pull Request - State: closed - Opened by phofl over 1 year ago - 2 comments
Labels: Regression, Stale

#58145 - REGR: from_records not initializing subclasses properly

Pull Request - State: closed - Opened by phofl over 1 year ago - 2 comments
Labels: Regression, Stale

#58027 - REGR: Performance of DataFrame.stack where columns are not a MultiIndex

Pull Request - State: open - Opened by rhshadrach over 1 year ago
Labels: Performance, Reshaping, Regression

#57911 - BUG: regression, is_unique is incorrect since pandas 2.1.0

Issue - State: closed - Opened by morotti over 1 year ago - 7 comments
Labels: Bug, Regression, Index

#57748 - ENH: No longer always show hour, minute and second components for pd.Interval

Issue - State: open - Opened by ClaireDons over 1 year ago - 2 comments
Labels: Bug, Output-Formatting, Regression

#57669 - Potential regression induced by commit 6ef44f2

Issue - State: closed - Opened by rhshadrach over 1 year ago - 1 comment
Labels: Performance, Regression, Internals

#57624 - Potential regression induced by PR #57534

Issue - State: closed - Opened by rhshadrach over 1 year ago - 1 comment
Labels: Performance, Regression, Index

#57623 - Potential regression induced by PR #57479

Issue - State: closed - Opened by rhshadrach over 1 year ago - 4 comments
Labels: Missing-data, Performance, Regression

#57622 - Potential regression induced by PR #57445

Issue - State: closed - Opened by rhshadrach over 1 year ago - 4 comments
Labels: Performance, Regression, Index

#57621 - Potential regression induced by PR #57402

Issue - State: closed - Opened by rhshadrach over 1 year ago - 1 comment
Labels: Indexing, Performance, Regression

#57620 - Potential regression induced by PR #57302

Issue - State: open - Opened by rhshadrach over 1 year ago
Labels: Performance, Reshaping, Regression

#57619 - Potential regression induced by PR #57328

Issue - State: closed - Opened by rhshadrach over 1 year ago - 3 comments
Labels: Missing-data, Performance, Regression

#57573 - Backport PR #57314 on branch 2.2.x (BUG: Fix near-minimum timestamp handling)

Pull Request - State: closed - Opened by meeseeksmachine over 1 year ago
Labels: Regression, Timestamp

#57544 - Potential regression induced by PR #57328

Issue - State: closed - Opened by rhshadrach over 1 year ago
Labels: Missing-data, Performance, Regression

#57496 - Backport PR #57474 on branch 2.2.x (REGR: DataFrame.transpose resulting in not contiguous data on nullable EAs)

Pull Request - State: closed - Opened by rhshadrach over 1 year ago - 1 comment
Labels: Bug, Reshaping, Regression

#57496 - Backport PR #57474 on branch 2.2.x (REGR: DataFrame.transpose resulting in not contiguous data on nullable EAs)

Pull Request - State: closed - Opened by rhshadrach over 1 year ago - 2 comments
Labels: Bug, Reshaping, Regression

#57485 - REGR: DataFrame.update emits spurious warning about downcasting

Pull Request - State: closed - Opened by rhshadrach almost 2 years ago
Labels: Bug, Dtype Conversions, Regression, DataFrame, Warnings, Conditionals

#57485 - REGR: DataFrame.update emits spurious warning about downcasting

Pull Request - State: closed - Opened by rhshadrach almost 2 years ago - 1 comment
Labels: Bug, Dtype Conversions, Regression, DataFrame, Warnings, Conditionals

#57475 - REGR: Index.map adding back tz to tz-agnostic result

Pull Request - State: closed - Opened by rhshadrach almost 2 years ago - 3 comments
Labels: Regression, Apply, Index

#57475 - REGR: Index.map adding back tz to tz-agnostic result

Pull Request - State: closed - Opened by rhshadrach almost 2 years ago - 3 comments
Labels: Regression, Apply, Index

#57474 - REGR: DataFrame.transpose resulting in not contiguous data on nullable EAs

Pull Request - State: closed - Opened by rhshadrach almost 2 years ago - 2 comments
Labels: Bug, Reshaping, Regression, Still Needs Manual Backport

#57474 - REGR: DataFrame.transpose resulting in not contiguous data on nullable EAs

Pull Request - State: closed - Opened by rhshadrach almost 2 years ago
Labels: Bug, Reshaping, Regression

#57466 - Backport PR #57311 on branch 2.2.x (Fixing multi method for to_sql for non-oracle databases)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Regression, IO SQL

#57466 - Backport PR #57311 on branch 2.2.x (Fixing multi method for to_sql for non-oracle databases)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Regression, IO SQL

#57431 - Potential perf regressions introduced by Copy-on-Write

Issue - State: open - Opened by rhshadrach almost 2 years ago - 9 comments
Labels: Performance, Regression, Copy / view semantics

#57429 - BUG: read_json(line=True) returns `Index` instead of `RangeIndex` in 2.2

Issue - State: closed - Opened by mroeschke almost 2 years ago - 1 comment
Labels: Regression, IO JSON

#57418 - BUG: conversion from Int64 to string introduces decimals in Pandas 2.2.0

Issue - State: closed - Opened by mplatzer almost 2 years ago - 7 comments
Labels: Bug, Dtype Conversions, Regression, Arrow

#57380 - Backport PR #57341 on branch 2.2.x (REGR: assert_series_equal defaulting to check_exact=True for Index)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Testing, Regression

#57380 - Backport PR #57341 on branch 2.2.x (REGR: assert_series_equal defaulting to check_exact=True for Index)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Testing, Regression

#57366 - Potential regression induced by PR #56037

Issue - State: open - Opened by rhshadrach almost 2 years ago
Labels: Performance, Regression, Non-Nano

#57341 - REGR: assert_series_equal defaulting to check_exact=True for Index

Pull Request - State: closed - Opened by phofl almost 2 years ago
Labels: Testing, Regression

#57341 - REGR: assert_series_equal defaulting to check_exact=True for Index

Pull Request - State: closed - Opened by phofl almost 2 years ago - 1 comment
Labels: Testing, Regression

#57339 - Backport PR #57323 on branch 2.2.x (REGR: Fix regression when grouping over a Series)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Regression, Copy / view semantics

#57339 - Backport PR #57323 on branch 2.2.x (REGR: Fix regression when grouping over a Series)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Regression, Copy / view semantics

#57337 - Backport PR #57333 on branch 2.2.x (REGR: merge with 3rd party EA's can sometimes raise ValueError)

Pull Request - State: closed - Opened by lukemanley almost 2 years ago
Labels: Reshaping, Regression

#57337 - Backport PR #57333 on branch 2.2.x (REGR: merge with 3rd party EA's can sometimes raise ValueError)

Pull Request - State: closed - Opened by lukemanley almost 2 years ago
Labels: Reshaping, Regression

#57336 - Backport PR #57329 on branch 2.2.x (REGR: CategoricalIndex.difference with null values)

Pull Request - State: open - Opened by meeseeksmachine almost 2 years ago
Labels: Regression, Categorical, setops

#57336 - Backport PR #57329 on branch 2.2.x (REGR: CategoricalIndex.difference with null values)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Regression, Categorical, setops

#57333 - REGR: merge with 3rd party EA's can sometimes raise ValueError

Pull Request - State: closed - Opened by lukemanley almost 2 years ago
Labels: Reshaping, Regression

#57333 - REGR: merge with 3rd party EA's can sometimes raise ValueError

Pull Request - State: closed - Opened by lukemanley almost 2 years ago - 2 comments
Labels: Reshaping, Regression

#57329 - REGR: CategoricalIndex.difference with null values

Pull Request - State: closed - Opened by lukemanley almost 2 years ago
Labels: Regression, Categorical, setops

#57329 - REGR: CategoricalIndex.difference with null values

Pull Request - State: closed - Opened by lukemanley almost 2 years ago - 1 comment
Labels: Regression, Categorical, setops

#57326 - Backport PR #57250 on branch 2.2.x (REGR/DOC: pd.concat should special case DatetimeIndex to sort even when sort=False)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Docs, Reshaping, Regression

#57326 - Backport PR #57250 on branch 2.2.x (REGR/DOC: pd.concat should special case DatetimeIndex to sort even when sort=False)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Docs, Reshaping, Regression

#57323 - REGR: Fix regression when grouping over a Series

Pull Request - State: closed - Opened by phofl almost 2 years ago
Labels: Regression, Copy / view semantics

#57323 - REGR: Fix regression when grouping over a Series

Pull Request - State: closed - Opened by phofl almost 2 years ago
Labels: Regression, Copy / view semantics

#57316 - BUG: ExtensionArray no longer can be merged with Pandas 2.2

Issue - State: closed - Opened by Hoxbro almost 2 years ago - 2 comments
Labels: Bug, Reshaping, Regression

#57315 - BUG: "ValueError: ndarray is not C-contiguous" when aggregating concatenated dataframe

Issue - State: closed - Opened by zephyrai-niq almost 2 years ago - 3 comments
Labels: Bug, Reshaping, Regression

#57314 - BUG: Fix near-minimum timestamp handling

Pull Request - State: open - Opened by robert-schmidtke almost 2 years ago - 4 comments
Labels: Regression, Timestamp

#57314 - BUG: Fix near-minimum timestamp handling

Pull Request - State: closed - Opened by robert-schmidtke almost 2 years ago - 4 comments
Labels: Regression, Timestamp

#57311 - Fixing multi method for to_sql for non-oracle databases

Pull Request - State: closed - Opened by kassett almost 2 years ago - 5 comments
Labels: Regression, IO SQL

#57311 - Fixing multi method for to_sql for non-oracle databases

Pull Request - State: closed - Opened by kassett almost 2 years ago - 6 comments
Labels: Regression, IO SQL

#57310 - BUG: method="multi" is not working with DataFrame.to_sql

Issue - State: closed - Opened by kassett almost 2 years ago
Labels: Bug, Regression, IO SQL

#57301 - BUG: AssertionError calling df.shift(axis=1) on empty DataFrame

Issue - State: closed - Opened by sfc-gh-joshi almost 2 years ago - 3 comments
Labels: Bug, Regression, Algos

#57250 - REGR/DOC: pd.concat should special case DatetimeIndex to sort even when sort=False

Pull Request - State: closed - Opened by lukemanley almost 2 years ago - 3 comments
Labels: Docs, Reshaping, Regression

#57250 - REGR/DOC: pd.concat should special case DatetimeIndex to sort even when sort=False

Pull Request - State: closed - Opened by lukemanley almost 2 years ago
Labels: Docs, Reshaping, Regression

#57240 - Backport PR #57232 on branch 2.2.x (REGR: to_json converting nullable ints to floats)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Regression, IO JSON

#57240 - Backport PR #57232 on branch 2.2.x (REGR: to_json converting nullable ints to floats)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Regression, IO JSON

#57232 - REGR: to_json converting nullable ints to floats

Pull Request - State: closed - Opened by phofl almost 2 years ago
Labels: Regression, IO JSON

#57232 - REGR: to_json converting nullable ints to floats

Pull Request - State: closed - Opened by phofl almost 2 years ago - 1 comment
Labels: Regression, IO JSON

#57192 - BUG: pandas 2.2.0 `DataFrame.groupby` regression when group labels of type `pd.Timestamp`

Issue - State: open - Opened by maread99 almost 2 years ago - 3 comments
Labels: Bug, Regression, Timezones, Index

#57180 - Backport PR #57169 on branch 2.2.x (REGR: DataFrame.sort_index not producing stable sort)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Regression, Index

#57180 - Backport PR #57169 on branch 2.2.x (REGR: DataFrame.sort_index not producing stable sort)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Regression, Index

#57176 - BUG: pandas.core.groupby.SeriesGroupBy.idxmax (and idxmin) - unexpected behavior with groups containing single NaN value

Issue - State: closed - Opened by semyonbok almost 2 years ago - 3 comments
Labels: Bug, Groupby, Regression, Duplicate Report, Reduction Operations

#57170 - REGR: Series.astype raising TypeError when converting a pyarrow integer type with nulls to numpy float

Pull Request - State: closed - Opened by lukemanley almost 2 years ago - 1 comment
Labels: Dtype Conversions, Regression, Arrow

#57170 - REGR: Series.astype raising TypeError when converting a pyarrow integer type with nulls to numpy float

Pull Request - State: closed - Opened by lukemanley almost 2 years ago - 1 comment
Labels: Dtype Conversions, Regression, Arrow

#57169 - REGR: DataFrame.sort_index not producing stable sort

Pull Request - State: open - Opened by lukemanley almost 2 years ago
Labels: Regression, Index

#57169 - REGR: DataFrame.sort_index not producing stable sort

Pull Request - State: closed - Opened by lukemanley almost 2 years ago - 1 comment
Labels: Regression, Index

#57150 - BUG: Localizing Timestamp.min changes dtype to object

Issue - State: closed - Opened by robert-schmidtke almost 2 years ago - 6 comments
Labels: Bug, Dtype Conversions, Regression, Timestamp

#57142 - Backport PR #57061 on branch 2.2.x (REGR: non-unique, masked dtype index raising IndexError)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Indexing, Regression

#57142 - Backport PR #57061 on branch 2.2.x (REGR: non-unique, masked dtype index raising IndexError)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Indexing, Regression

#57141 - Backport PR #57102 on branch 2.2.x (ENH: Add skipna to groupby.first and groupby.last)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Enhancement, Groupby, Regression, Reduction Operations

#57141 - Backport PR #57102 on branch 2.2.x (ENH: Add skipna to groupby.first and groupby.last)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Enhancement, Groupby, Regression, Reduction Operations

#57133 - Backport PR #57101 on branch 2.2.x (REGR: Index.join raising TypeError when joining an empty index to a mixed type index)

Pull Request - State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Reshaping, Regression

GitHub / pandas-dev/pandas issues and pull requests