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Issues list

BUG: DataFrame constructor not compatible with array-like classes that have a 'name' attribute Bug Constructors Series/DataFrame/Index/pd.array Constructors
#61443 opened May 14, 2025 by user27182
2 of 3 tasks
1
4
BUG: Constructing series with Timedelta object results in datetime series Bug Constructors Series/DataFrame/Index/pd.array Constructors Timedelta Timedelta data type
#61365 opened Apr 27, 2025 by Casper-Guo
3 tasks done
3
BUG: Memory leak when creating a df inside a loop Bug Closing Candidate May be closeable, needs more eyeballs Constructors Series/DataFrame/Index/pd.array Constructors Performance Memory or execution speed performance Windows Windows OS
#60897 opened Feb 9, 2025 by Chuck321123
3 tasks done
17
BUG: many dataframe operations broken when a column contains numpy structured array Bug Constructors Series/DataFrame/Index/pd.array Constructors Error Reporting Incorrect or improved errors from pandas
#60108 opened Oct 26, 2024 by digitalsignalperson
2 of 3 tasks
9
BUG: Creation of UInt64 column with 18446744073709551615 throws RuntimeWarning Bug Constructors Series/DataFrame/Index/pd.array Constructors ExtensionArray Extending pandas with custom dtypes or arrays.
#60050 opened Oct 15, 2024 by Tishj
2 of 3 tasks
@lfffkh
3
BUG: Boolean Series (actually object) with <NA> values breaks ~ negation and reverts to bit-wise operations Bug Closing Candidate May be closeable, needs more eyeballs Constructors Series/DataFrame/Index/pd.array Constructors NA - MaskedArrays Related to pd.NA and nullable extension arrays
#60049 opened Oct 15, 2024 by RedAero
3 tasks done
3
ENH: DataFrame.from_dict doesn't work with collections.UserDict objects Constructors Series/DataFrame/Index/pd.array Constructors Enhancement IO Data IO issues that don't fit into a more specific label Needs Discussion Requires discussion from core team before further action
#59737 opened Sep 6, 2024 by mesvam
2 of 3 tasks
6
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
ENH: generalize __init__ on a dict to abc.collections.Mapping and __getitem__ on a list to abc.collections.Sequence API Design Constructors Series/DataFrame/Index/pd.array Constructors Enhancement Needs Discussion Requires discussion from core team before further action
#58803 opened May 21, 2024 by MilesCranmer
1 of 3 tasks
1
14
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
PERF: timezoned series created 6x faster than non-timezoned series Constructors Series/DataFrame/Index/pd.array Constructors Performance Memory or execution speed performance Timestamp pd.Timestamp and associated methods Timezones Timezone data dtype
#56860 opened Jan 13, 2024 by soerenwolfers
2 of 3 tasks
4
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: Inconsistent behavior while constructing a Series with large integers in a int64 masked array Bug Constructors Series/DataFrame/Index/pd.array Constructors Dtype Conversions Unexpected or buggy dtype conversions NA - MaskedArrays Related to pd.NA and nullable extension arrays
#56566 opened Dec 19, 2023 by MridulS
3 tasks done
4
3
REF/EA-API: EA constructor without dtype specified API Design Constructors Series/DataFrame/Index/pd.array Constructors ExtensionArray Extending pandas with custom dtypes or arrays.
#56430 opened Dec 10, 2023 by jbrockmendel
4
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
API/PERF: when to check for mismatched tzs/awareness in array_to_datetime API Design Constructors Series/DataFrame/Index/pd.array Constructors Datetime Datetime data dtype Performance Memory or execution speed performance
#55779 opened Oct 31, 2023 by jbrockmendel
2
API: to_datetime with integers/floats and format desired behavior? API Design Constructors Series/DataFrame/Index/pd.array Constructors Datetime Datetime data dtype
#55663 opened Oct 24, 2023 by jbrockmendel
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
BUG: Series constructor incorrectly assumes that any dtype with .kind == 'V...' is a “compound dtype” Bug Constructors Series/DataFrame/Index/pd.array Constructors
#54810 opened Aug 28, 2023 by flying-sheep
3 tasks done
6
QST: pandas.DataFrame() converts pyarrow.array() to numpy series Arrow pyarrow functionality Bug Constructors Series/DataFrame/Index/pd.array Constructors Dtype Conversions Unexpected or buggy dtype conversions
#54057 opened Jul 9, 2023 by yoonghm
2 tasks done
4
API/DEPR: pd.array don't cast numpy int/float/bool arrays to nullable API Design Constructors Series/DataFrame/Index/pd.array Constructors Deprecate Functionality to remove in pandas NA - MaskedArrays Related to pd.NA and nullable extension arrays Needs Discussion Requires discussion from core team before further action PDEP missing values Issues that would be addressed by the Ice Cream Agreement from the Aug 2023 sprint
#53695 opened Jun 15, 2023 by jbrockmendel
2
BUG: (regression? v2 vs v1.5) ValueError: Big-endian buffer not supported on little-endian compiler Constructors Series/DataFrame/Index/pd.array Constructors Regression Functionality that used to work in a prior pandas version
#53234 opened May 15, 2023 by st-bender
3 tasks done
2.2.3
14
API: construction from custom object with __array__ method API - Consistency Internal Consistency of API/Behavior Constructors Series/DataFrame/Index/pd.array Constructors
#53085 opened May 4, 2023 by jbrockmendel
2
ENH: switch to copy=False by default when DataFrame is constructed from dict of Series/Index for CoW Constructors Series/DataFrame/Index/pd.array Constructors Copy / view semantics Enhancement Needs Discussion Requires discussion from core team before further action
#52967 opened Apr 27, 2023 by phofl
1 of 3 tasks
3.0
2
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
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