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Issues list

BUG: DataFrame([Series with different CategoricalIndexes]) results in non-Categorical columns Categorical Categorical Data Type Constructors Series/DataFrame/Index/pd.array Constructors DataFrame DataFrame data structure
#57592 opened Feb 23, 2024 by mroeschke
1
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: Empty list passed to Series returns object dtype, but via DataFrame returns float64 Bug Constructors Series/DataFrame/Index/pd.array Constructors DataFrame DataFrame data structure Dtype Conversions Unexpected or buggy dtype conversions
#56679 opened Dec 29, 2023 by galipremsagar
2 of 3 tasks
1
9
BUG: DataFrame([empty EA Series]) returns NAs with dtype object Bug Constructors Series/DataFrame/Index/pd.array Constructors DataFrame DataFrame data structure NA - MaskedArrays Related to pd.NA and nullable extension arrays
#56231 opened Nov 28, 2023 by mroeschke
3 tasks done
2
BUG: Data type is float64 when Dataframe is initialized with array of shape (0, 0) Bug Constructors Series/DataFrame/Index/pd.array Constructors DataFrame DataFrame data structure Dtype Conversions Unexpected or buggy dtype conversions
#55649 opened Oct 23, 2023 by GianlucaFicarelli
2 of 3 tasks
1
@tpackard1
5
set allowed for index argument in Series, index and columns for DataFrame.from_records() API - Consistency Internal Consistency of API/Behavior DataFrame DataFrame data structure Series Series data structure
#55425 opened Oct 6, 2023 by Dr-Irv
7
BUG: round not functioning as expected Bug DataFrame DataFrame data structure
#55114 opened Sep 13, 2023 by galipremsagar
2 of 3 tasks
1
BUG (Regression): Using a tuple as first column name in empty dataframe creates a non functional dataframe and memory errors Bug DataFrame DataFrame data structure Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#54385 opened Aug 3, 2023 by jenno-verdonck
2 of 3 tasks
4
BUG: Rows are not inserted into DataFrame from lists of one element in v2.0 Bug Constructors Series/DataFrame/Index/pd.array Constructors DataFrame DataFrame data structure Regression Functionality that used to work in a prior pandas version
#52825 opened Apr 21, 2023 by n-splv
3 tasks done
1
5
BUG: fixed-length string arrays are not recognised as bytes on instantiation Bug Compat pandas objects compatability with Numpy or Python functions Constructors Series/DataFrame/Index/pd.array Constructors DataFrame DataFrame data structure
#51994 opened Mar 15, 2023 by gszep
3 tasks done
@rsurpur20
4
BUG: Order of dict items in DataFrame.from_dict changes the result dataframe Bug Constructors Series/DataFrame/Index/pd.array Constructors DataFrame DataFrame data structure
#50461 opened Dec 28, 2022 by Itayazolay
3 tasks done
2
BUG: DataFrame.dtypes doesn't include backend for string columns Bug DataFrame DataFrame data structure Output-Formatting __repr__ of pandas objects, to_string Strings String extension data type and string data
#50099 opened Dec 7, 2022 by jrbourbeau
2 of 3 tasks
3.0
1
3
API: Clarify difference between agg and apply for Series / DataFrame API Design Apply Apply, Aggregate, Transform, Map DataFrame DataFrame data structure Deprecate Functionality to remove in pandas Needs Discussion Requires discussion from core team before further action Series Series data structure
#49673 opened Nov 12, 2022 by rhshadrach
2
BUG: .unstack() with recarray column raises TypeError since 1.4.0 Bug Constructors Series/DataFrame/Index/pd.array Constructors DataFrame DataFrame data structure
#49388 opened Oct 29, 2022 by stefan-jansen
3 tasks done
1
5
API: Consistency between DataFrame, MultiIndex.to_frame and reset_index API - Consistency Internal Consistency of API/Behavior DataFrame DataFrame data structure Dtype Conversions Unexpected or buggy dtype conversions
#45245 opened Jan 7, 2022 by johnzangwill
ENH: Deprecate DataFrame.iterrows DataFrame DataFrame data structure Deprecate Functionality to remove in pandas Needs Discussion Requires discussion from core team before further action
#43874 opened Oct 4, 2021 by dclong
4
BUG: pd.testing.assert_frame_equal fails if nested DataFrame contains np.nan Bug DataFrame DataFrame data structure Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.). Testing pandas testing functions or related to the test suite
#43022 opened Aug 13, 2021 by ChiQiao
2 of 3 tasks
@pratyushsharan
6
BUG: Different initialization methods lead to different dtypes (DataFrame) API - Consistency Internal Consistency of API/Behavior Bug Constructors Series/DataFrame/Index/pd.array Constructors DataFrame DataFrame data structure Dtype Conversions Unexpected or buggy dtype conversions
#42971 opened Aug 10, 2021 by RileyLazarou
2 of 3 tasks
1
8
ENH: Support DataFrame.searchsorted Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff DataFrame DataFrame data structure Enhancement Needs Discussion Requires discussion from core team before further action
#42872 opened Aug 3, 2021 by ChrisJar
4
ENH: DataFrame.to_expr() method DataFrame DataFrame data structure Enhancement IO Data IO issues that don't fit into a more specific label Needs Discussion Requires discussion from core team before further action
#41837 opened Jun 6, 2021 by kerrickstaley
4
REF/CLN: DataFrame.combine_first DataFrame DataFrame data structure Refactor Internal refactoring of code
#38174 opened Nov 30, 2020 by arw2019
1
2
DataFrame.describe() output is not deterministic Bug DataFrame DataFrame data structure Docs
#32528 opened Mar 7, 2020 by ShaharNaveh
1
3
Pandas Tests rely on inconsistent array coercion DataFrame DataFrame data structure Deprecate Functionality to remove in pandas
#29978 opened Dec 2, 2019 by seberg
5
set_axis with callable DataFrame DataFrame data structure Enhancement MultiIndex Needs Discussion Requires discussion from core team before further action
#29145 opened Oct 22, 2019 by markxwang
7
apply sometimes unexpectantly casts int64 series to objects Apply Apply, Aggregate, Transform, Map Bug DataFrame DataFrame data structure Dtype Conversions Unexpected or buggy dtype conversions
#28773 opened Oct 3, 2019 by crew102
1
7
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