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200 Open 2,182 Closed
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Issues list

BUG: NA are coerced in to NaN by concat Bug Dtype Conversions Unexpected or buggy dtype conversions Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate PDEP missing values Issues that would be addressed by the Ice Cream Agreement from the Aug 2023 sprint Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#61303 opened Apr 17, 2025 by davetapley
3 tasks done
4
BUG: Inconsistency when converting week PeriodIndex into DatetimeIndex with astype("datetime64[ns]") Bug Datetime Datetime data dtype Dtype Conversions Unexpected or buggy dtype conversions Needs Discussion Requires discussion from core team before further action Period Period data type
#61177 opened Mar 25, 2025 by dbalabka
3 tasks done
4
BUG(?): rolling sum with pyarrow types results in float64 instead of preserving integer type Arrow pyarrow functionality Bug Dtype Conversions Unexpected or buggy dtype conversions Window rolling, ewma, expanding
#61144 opened Mar 18, 2025 by MarcoGorelli
3 tasks done
3
BUG: Fix return type of loc/iloc Bug Dtype Conversions Unexpected or buggy dtype conversions Indexing Related to indexing on series/frames, not to indexes themselves
#61054 opened Mar 4, 2025 by sanggon6107 Loading…
3 of 5 tasks
1
17
BUG: Poor GroupBy Performance with ArrowDtype(...) wrapped types Arrow pyarrow functionality Bug Dtype Conversions Unexpected or buggy dtype conversions Needs Discussion Requires discussion from core team before further action
#60861 opened Feb 5, 2025 by kzvezdarov
3 tasks done
13
BUG: loc[] returns object type instead of float Bug Dtype Conversions Unexpected or buggy dtype conversions Indexing Related to indexing on series/frames, not to indexes themselves
#60600 opened Dec 23, 2024 by metazoic
3 tasks done
1
@parthi-siva @sanggon6107 @DarthKitten2130
13
BUG/API: preserve dtype in Index append() Dtype Conversions Unexpected or buggy dtype conversions Index Related to the Index class or subclasses Strings String extension data type and string data
#60159 opened Oct 31, 2024 by jorisvandenbossche 3.0
3
BUG: allow complex type in convert_dtypes Bug Complex Complex Numbers Dtype Conversions Unexpected or buggy dtype conversions
#60129 opened Oct 30, 2024 by yasirroni
1 of 3 tasks
@kdarwai
2
BUG: Series.combine_first loss of precision Bug Dtype Conversions Unexpected or buggy dtype conversions
#60128 opened Oct 30, 2024 by jessestone7
2 of 3 tasks
1
8
BUG: Timezone upon DatetimeIndex union is changed to UTC Bug Dtype Conversions Unexpected or buggy dtype conversions Timezones Timezone data dtype
#60080 opened Oct 21, 2024 by alippai
2 of 3 tasks
2
@brandonmonge @myenugula
2
ENH: Restore the functionality of .fillna Dtype Conversions Unexpected or buggy dtype conversions Enhancement Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Needs Discussion Requires discussion from core team before further action Needs Info Clarification about behavior needed to assess issue
#59831 opened Sep 18, 2024 by tomprimozic
1 of 3 tasks
3
BUG: converting null timedelta to int with astype() changes NaT to -9223372036854775808 Bug Dtype Conversions Unexpected or buggy dtype conversions Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Needs Discussion Requires discussion from core team before further action
#59711 opened Sep 4, 2024 by sfc-gh-mvashishtha
2 of 3 tasks
2
BUG: Incorrect float32/float64 comparison result Bug Closing Candidate May be closeable, needs more eyeballs Dtype Conversions Unexpected or buggy dtype conversions
#59524 opened Aug 15, 2024 by alexowens90
3 tasks done
7
DEPR: future.no_silent_downcasting option Deprecate Functionality to remove in pandas Dtype Conversions Unexpected or buggy dtype conversions
#59502 opened Aug 13, 2024 by jbrockmendel
3 tasks done
1
1
BUG: Can't store IntEnum members inside a pd.DataFrame column of object dtype. If you use pd.Series it works Bug Constructors Series/DataFrame/Index/pd.array Constructors Dtype Conversions Unexpected or buggy dtype conversions
#59380 opened Aug 1, 2024 by willofferfit
2 of 3 tasks
@sdalmia11
2
API: pd.StringDtype.value_counts should return pd.Int64Dtype API - Consistency Internal Consistency of API/Behavior API Design Arrow pyarrow functionality Dtype Conversions Unexpected or buggy dtype conversions ExtensionArray Extending pandas with custom dtypes or arrays.
#59346 opened Jul 29, 2024 by WillAyd
1 of 3 tasks
4
BUG: read_sql tries to convert blob/varbinary to string with pyarrow backend Arrow pyarrow functionality Bug Dtype Conversions Unexpected or buggy dtype conversions IO SQL to_sql, read_sql, read_sql_query
#59242 opened Jul 13, 2024 by dbrownems
3 tasks done
1
@kastkeepitjumpinlikekangaroos
3
DEPR: keep_default_dates and convert_dates in read_json Deprecate Functionality to remove in pandas Dtype Conversions Unexpected or buggy dtype conversions IO JSON read_json, to_json, json_normalize
#59161 opened Jul 1, 2024 by mroeschke
6
BUG: Accessing a row with loc recasts dtype and can cause values to change depending on other columns API Design Dtype Conversions Unexpected or buggy dtype conversions Needs Discussion Requires discussion from core team before further action
#59008 opened Jun 13, 2024 by ceesem
3 tasks done
2
BUG: Unexpected cast to float for DataFrame.groupby().agg(engine="numba") Bug Dtype Conversions Unexpected or buggy dtype conversions Groupby numba numba-accelerated operations
#58869 opened May 30, 2024 by willsthompson
2 of 3 tasks
1
BUG: pd.concat fails with large index values when using ArrowDtype Arrow pyarrow functionality Bug Dtype Conversions Unexpected or buggy dtype conversions Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#58819 opened May 24, 2024 by hombit
3 tasks done
1
BUG: .max() raises exception on Series with object dtype and mixture of Timestamp and NaT: TypeError: '>=' not supported between instances of 'Timestamp' and 'float' Bug Dtype Conversions Unexpected or buggy dtype conversions Reshaping Concat, Merge/Join, Stack/Unstack, Explode Timezones Timezone data dtype
#58707 opened May 13, 2024 by kerrickstaley
2 of 3 tasks
@li00-lab
4
BUG: DataFrame.convert_dtype(convert_integer=True) with int64_t limits throws Warning Bug Dtype Conversions Unexpected or buggy dtype conversions Warnings Warnings that appear or should be added to pandas
#58485 opened Apr 30, 2024 by Tishj
2 of 3 tasks
1
ENH: Infer column dtype when constructing object with pd.NA Dtype Conversions Unexpected or buggy dtype conversions Enhancement NA - MaskedArrays Related to pd.NA and nullable extension arrays Needs Discussion Requires discussion from core team before further action
#58366 opened Apr 22, 2024 by amanlai
1 of 3 tasks
2
What's the design decision regarding whether operations can return another backend's object? Arrow pyarrow functionality Dtype Conversions Unexpected or buggy dtype conversions NA - MaskedArrays Related to pd.NA and nullable extension arrays pyarrow dtype retention op with pyarrow dtype -> expect pyarrow result Usage Question
#58312 opened Apr 18, 2024 by anmyachev
2
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