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195 Open 2,162 Closed
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Issues list

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
2
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
1
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
BUG: read_json silently ignores the dtype when engine=pyarrow Bug Dtype Conversions Unexpected or buggy dtype conversions IO JSON read_json, to_json, json_normalize
#59516 opened Aug 14, 2024 by benjamin-hodgson
3 tasks done
1
@jahn96
4
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
2
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
3
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
BUG: Behaviour of sum/mean on sparse boolean arrays changed between 1.5.3 and pandas 2.2 Bug Dtype Conversions Unexpected or buggy dtype conversions ExtensionArray Extending pandas with custom dtypes or arrays. Reduction Operations sum, mean, min, max, etc.
#58015 opened Mar 26, 2024 by CompRhys
2 of 3 tasks
@dontgoto
5
DOC: Series.diff with boolean dtype does not return a series of dtype float Docs Dtype Conversions Unexpected or buggy dtype conversions Needs Discussion Requires discussion from core team before further action Transformations e.g. cumsum, diff, rank
#57565 opened Feb 22, 2024 by from-nowhere
1 task done
4
BUG: Unexpected read_csv parse_dates behavior Bug datetime.date stdlib datetime.date support Dtype Conversions Unexpected or buggy dtype conversions IO CSV read_csv, to_csv
#57512 opened Feb 19, 2024 by kounoupis
2 of 3 tasks
1
@ruimamaral
6
BUG: KeyError: DictionaryType when converting to/from PyArrow backend Arrow pyarrow functionality Bug Dtype Conversions Unexpected or buggy dtype conversions Needs Discussion Requires discussion from core team before further action pyarrow dtype retention op with pyarrow dtype -> expect pyarrow result
#57395 opened Feb 13, 2024 by ajfriend
2 of 3 tasks
7
BUG: to_numeric loses precision when converting decimal type to integer Bug Dtype Conversions Unexpected or buggy dtype conversions
#57213 opened Feb 2, 2024 by sfc-gh-aalam
2 of 3 tasks
2
@Leventide
3
BUG: DataFrame.update() raises FutureWarning due to the use of 'where' method Bug Conditionals E.g. where, mask, case_when DataFrame DataFrame data structure Dtype Conversions Unexpected or buggy dtype conversions Regression Functionality that used to work in a prior pandas version
#57124 opened Jan 29, 2024 by Clifford-Yen
3 tasks done
2.3
1
BUG: Can't convert int64[pyarrow] series with missing values to legacy numpy float series Arrow pyarrow functionality Bug Dtype Conversions Unexpected or buggy dtype conversions Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate
#57093 opened Jan 26, 2024 by mattharrison
2 of 3 tasks
1
1
BUG: df.iloc[:, x] = df.iloc[:, x].apply(int) will failed just and only when int in apply() Bug Closing Candidate May be closeable, needs more eyeballs Dtype Conversions Unexpected or buggy dtype conversions Indexing Related to indexing on series/frames, not to indexes themselves Needs Triage Issue that has not been reviewed by a pandas team member PDEP6-related related to PDEP6 (not upcasting during setitem-like Series operations)
#56796 opened Jan 9, 2024 by tomy128
3 tasks done
5
BUG: Concat for two dataframes row-wise fails if one of columns is datetime and iterrows was used Bug datetime.date stdlib datetime.date support Dtype Conversions Unexpected or buggy dtype conversions
#56779 opened Jan 8, 2024 by ilyakochik
2 of 3 tasks
7
ProTip! Exclude everything labeled bug with -label:bug.