22 Pull requests merged by 15 people

• BUG: Fix MultiIndex from_tuples on tuples with NaNs

  #60944 merged Mar 7, 2025

• BUG: Fix OverflowError in lib.maybe_indices_to_slice()

  #61080 merged Mar 7, 2025

• BUG: Fix concat DataFrame and Series with ignore_index=True

  #60983 merged Mar 7, 2025

• BUG: Fix na_position type in IndexEngine

  #61062 merged Mar 7, 2025

• DOC: Add link description

  #61063 merged Mar 6, 2025

• DOC: Add inference type information to Dataframe Apply

  #61065 merged Mar 6, 2025

• DOC: Fix syntax highlighting in overview

  #61066 merged Mar 6, 2025

• DOC: Fix typo in Timestamp.isoformat

  #61067 merged Mar 6, 2025

• BUG: Recognize chained fsspec URLs

  #61041 merged Mar 5, 2025

• Adjust Docker File Key Value Format

  #61050 merged Mar 5, 2025

• DOC: Correct a typo in ecosystem.md

  #61059 merged Mar 5, 2025

• DOC: Updated set_index doc with a warning

  #60990 merged Mar 5, 2025

• Renamed "normalise" to "normalize"

  #61051 merged Mar 4, 2025

• DOC Fix Styler.to_latex to be in Writer column

  #61053 merged Mar 4, 2025

• Backport PR #61042: CI/TST: Fix xfail in test_columns_dtypes_not_invalid for pyarrow nightly

  #61044 merged Mar 4, 2025

• ENH: Add JupyterLite-powered shell for the website (reprise of #47428)

  #60758 merged Mar 4, 2025

• test_datetimes.py: fix literal string

  #60820 merged Mar 3, 2025

• CI/TST: Fix xfail in test_columns_dtypes_not_invalid for pyarrow nightly

  #61042 merged Mar 3, 2025

• CI: Bump GHA uses versions

  #61039 merged Mar 3, 2025

• ENH: Add HalfYear offsets

  #60946 merged Mar 3, 2025

• DOC: Correct typos in Working with text data

  #61034 merged Mar 3, 2025

• [pre-commit.ci] pre-commit autoupdate

  #61038 merged Mar 3, 2025

16 Pull requests opened by 15 people

• [WIP] Allow JIT compilation with an internal API

  #61032 opened Mar 2, 2025

• BUG: fix DataFrame.__setitem__ throwing a ValueError when setting a column with a 2D object array

  #61035 opened Mar 3, 2025

• perf: improve membership check performance in column filtering

  #61046 opened Mar 4, 2025

• BUG: Fix return type of loc/iloc

  #61054 opened Mar 4, 2025

• ENH, DOC: Add JupyterLite-powered interactive examples for the `pandas` documentation

  #61061 opened Mar 5, 2025

• DOC: Update warning in `Index.values` docstring to clarify index modification which causes segmentation fault

  #61069 opened Mar 6, 2025

• BUG: Addressing #61072

  #61073 opened Mar 7, 2025

• BUG: PeriodIndex.to_datetime inconsistent with its docstring

  #61077 opened Mar 7, 2025

• Doc for backend-specific arguments for df.plot()

  #61078 opened Mar 7, 2025

• DOC: Add doc for half year offsets

  #61082 opened Mar 8, 2025

• Bug: Fix for overflow at edge cases in `normalize()` by raising exception

  #61083 opened Mar 8, 2025

• BUG: Improve ImportError message to suggest importing dependencies directly for full error details

  #61084 opened Mar 8, 2025

• DEPS: Update NumpyExtensionArray repr for NEP51

  #61085 opened Mar 8, 2025

• ENH: Add Rolling.nunique()

  #61087 opened Mar 8, 2025

• Update hist.py

  #61089 opened Mar 9, 2025

• Boolean indexing inconsistency

  #61090 opened Mar 9, 2025

22 Issues closed by 6 people

• BUG: The Series `.map()` function frequently fails when using dictionaries with tuple keys in various cases.

  #60988 closed Mar 7, 2025

• BUG: Series constructor from dictionary drops key (index) levels when not all keys have same number of entries

  #60695 closed Mar 7, 2025

• BUG: sometimes when using ~ and & operators for indexing it evaluated incorrectly

  #61052 closed Mar 7, 2025

• BUG: Printing float16 with NumPy>=2.0 gives overflow warning

  #61029 closed Mar 7, 2025

• BUG: OverflowError: value too large to convert to int when manipulating very large dataframes

  #59531 closed Mar 7, 2025

• BUG: Potentially incorrect result of `df.rolling(window=...).mean()`

  #61071 closed Mar 7, 2025

• BUG: `pd.concat` on axis "index" has unexpected result concatenating Series and DataFrame with same (column) name

  #56257 closed Mar 7, 2025

• BUG: Concatenating dataframe and series with `ignore_index = True` drops the series name

  #60723 closed Mar 7, 2025

• BUG: Index containing NA behaves absolutely unpredictably when length exceeds 128

  #58924 closed Mar 7, 2025

• DOC: Outdated example of DataFrame.mean

  #61070 closed Mar 6, 2025

• BUG: Chained urls (allowed by fsspec) not recognized by is_fsspec_url

  #48978 closed Mar 5, 2025

• ENH: json_normalize should work with JSON

  #61006 closed Mar 5, 2025

• Correction: Adjust Dockerfile key value format

  #61036 closed Mar 5, 2025

• DOC: No warning in set_index() that previous index column is removed.

  #60973 closed Mar 5, 2025

• BUG: invalid result of reindex on columns after unstack with Period data #60980

  #61055 closed Mar 5, 2025

• BUG: Ghost Column Generation Bug in .loc[] with Series Column Selector (Pandas 2.2.2)

  #61049 closed Mar 4, 2025

• Correction: Standardize spelling of "normalize" in codebase

  #61047 closed Mar 4, 2025

• DOC: Reinstate the JupyterLite-based live shell for the pandas website

  #60747 closed Mar 4, 2025

• BUG: Cannot cast float to int using map function

  #61016 closed Mar 3, 2025

• BUG: `.str.replace()` with capture groups does not play nice with string methods

  #61043 closed Mar 3, 2025

• Add "semester" as a time/date component to DatetimeIndex

  #22362 closed Mar 3, 2025

• ENH: Control resampling at halfyear with origin

  #60928 closed Mar 3, 2025

16 Issues opened by 16 people

• BUG: Collision between equivalent frequencies 'QS-FEB' and 'QS-NOV'

  #61086 opened Mar 8, 2025

• BUG: pd.api.types.infer_dtype on scalar input

  #61081 opened Mar 7, 2025

• BUILD: installation using wheels fails when using nix + uv2nix

  #61079 opened Mar 7, 2025

• PERF: why nlargest is so slower?

  #61076 opened Mar 7, 2025

• ENH: use the option framework to opt-out of auto-alignment

  #61075 opened Mar 7, 2025

• DEPR: Make `dtype="category"` always imply ordered=False

  #61074 opened Mar 7, 2025

• BUG: str.fullmatch behavior is not the same for object dtype and string[pyarrow] dtype

  #61072 opened Mar 7, 2025

• BUG: Sorting fails in specific cases with pandas==2.1.1

  #61068 opened Mar 6, 2025

• DOC: Add link to the "try pandas online" in the regular documentation

  #61060 opened Mar 5, 2025

• DOC: Pivot() example call incorrectly used and would give "error: duplicate index"

  #61058 opened Mar 5, 2025

• BUG: Inconsistent behaviour of apply with result_type='expand' for functions that can return NaN type values

  #61057 opened Mar 4, 2025

• PERF: Optimize membership check in column filtering for better performance

  #61045 opened Mar 4, 2025

• Metadata generation failed when installing PyQt5

  #61037 opened Mar 3, 2025

• ENH: Add `coalesce_keys` option to join

  #61033 opened Mar 3, 2025

• BUG: `ValueError: ndarray is not C-contiguous` for `cummax` on nullable dtypes

  #61031 opened Mar 2, 2025

• BUG: Dependency check custom error loses information

  #61030 opened Mar 2, 2025

50 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• BUG: Add fillna at the beginning of _where not to fill NA. #60729

  #60772 commented on Mar 7, 2025 • 14 new comments

• BUG: fix read_json ignoring the dtype with the pyarrow engine

  #60997 commented on Mar 7, 2025 • 9 new comments

• MNT: Bump dev pin on NumPy

  #60987 commented on Mar 8, 2025 • 6 new comments

• BUG: fix PeriodIndex.difference producing incorrect results

  #60992 commented on Mar 4, 2025 • 3 new comments

• BUG: Fixed assign failure when with Copy-on-Write

  #60941 commented on Mar 2, 2025 • 3 new comments

• Bug cov nat

  #60898 commented on Mar 5, 2025 • 2 new comments

• BUG(string dtype): Empty sum produces incorrect result

  #60936 commented on Mar 7, 2025 • 1 new comment

• BUG: need to block split when filling na

  #14407 commented on Mar 6, 2025 • 0 new comments

• BUG: `series.reindex(mi)` behaves different for series with Index and MultiIndex

  #60923 commented on Mar 6, 2025 • 0 new comments

• BUG: Some string methods treat "." as regex, others don't

  #37963 commented on Mar 6, 2025 • 0 new comments

• PERF: cut with IntervalIndex slower than cut with array of bin edges for large arrays

  #47614 commented on Mar 7, 2025 • 0 new comments

• ENH: Skip costly `is_unique` call while creating `Categorical` arrays

  #60981 commented on Mar 7, 2025 • 0 new comments

• BUG: unexpected behavior when Loading lines like "\""\t"a"

  #59222 commented on Mar 7, 2025 • 0 new comments

• Option to Raise Exception on Unmapped Value in Series.map

  #14210 commented on Mar 7, 2025 • 0 new comments

• BUG: tz-aware series with NaT raises exception on .to_numpy("datetime64")

  #59772 commented on Mar 7, 2025 • 0 new comments

• WEB: Multiple "Getting Started" on pandas.io leads to different links

  #32307 commented on Mar 7, 2025 • 0 new comments

• BUG: Convertion fails for columns with datetime64[ms]

  #57738 commented on Mar 7, 2025 • 0 new comments

• DOC: Enforce Numpy Docstring Validation | pandas.Timestamp

  #58505 commented on Mar 7, 2025 • 0 new comments

• PERF: Surprisingly slow nlargest with duplicates in the index

  #55767 commented on Mar 8, 2025 • 0 new comments

• ENH: provide nunique method on Rolling object

  #26958 commented on Mar 8, 2025 • 0 new comments

• BUG: `Timestamp.normalize()` can overflow silently

  #60583 commented on Mar 8, 2025 • 0 new comments

• ENH: Add a ratio() Method for Series and dataframes. Alternatively, consider removing similar methods at this functionality level (e.g. diff() and pct_change())

  #60801 commented on Mar 9, 2025 • 0 new comments

• ENH: Allow `s.map(d, na_action='raise')`

  #60482 commented on Mar 8, 2025 • 0 new comments

• expand on different Getitem uses

  #60806 commented on Mar 3, 2025 • 0 new comments

• Fix Error Message in .query() for DataFrame with Duplicate Column Names

  #60864 commented on Mar 9, 2025 • 0 new comments

• BUG: Arugment nan_as_null is unused in __dataframe__ calls.

  #61025 commented on Mar 2, 2025 • 0 new comments

• BUG: df.plot() multi-column subplots & title interaction

  #61019 commented on Mar 2, 2025 • 0 new comments

• BUG: df.plot() "Subplots" changes behavior of how values are stacked using the "Stacked" property

  #61018 commented on Mar 2, 2025 • 0 new comments

• BUG: import has error

  #59527 commented on Mar 2, 2025 • 0 new comments

• Move interchange protocol implementation into a separate project

  #56732 commented on Mar 2, 2025 • 0 new comments

• DOC: df.plot() is missing color parameter on documentation

  #61020 commented on Mar 2, 2025 • 0 new comments

• BUG: Docs won't build (Unexpected exception in `doc\source\user_guide\enhancingperf.rst`)

  #60149 commented on Mar 2, 2025 • 0 new comments

• BUG: scatter and line matplotlib plots not compatible for sharex=True datetime plots

  #61005 commented on Mar 2, 2025 • 0 new comments

• BUG: setting column with 2D object array raises

  #61026 commented on Mar 3, 2025 • 0 new comments

• BUG: loc[] returns object type instead of float

  #60600 commented on Mar 3, 2025 • 0 new comments

• DOC: Missing documentation for pandas styler properties

  #60872 commented on Mar 3, 2025 • 0 new comments

• BUG: Memory leak when creating a df inside a loop

  #60897 commented on Mar 4, 2025 • 0 new comments

• BUILD: Trouble installing pandas on Windows

  #60947 commented on Mar 4, 2025 • 0 new comments

• ENH: Support `pa.json_` in arrow extension type

  #60958 commented on Mar 4, 2025 • 0 new comments

• Add support for "regex" library

  #22496 commented on Mar 4, 2025 • 0 new comments

• BUG: `iloc` with `Series` as indexer fails for `__getitem__` but works with `__setitem__`

  #60994 commented on Mar 5, 2025 • 0 new comments

• ENH: Support for Python 3.13.2 free-threading version

  #60972 commented on Mar 5, 2025 • 0 new comments

• BUG: invalid result of reindex on columns after unstack with Period data

  #60980 commented on Mar 5, 2025 • 0 new comments

• BUG: pd.HDFStore(file, mode='a') increases file size unnecessarily when file exists and dataframe contains string-based columns

  #60823 commented on Mar 5, 2025 • 0 new comments

• BUG: Index[timestamp[pyarrow]].union with itself return object type

  #58421 commented on Mar 5, 2025 • 0 new comments

• read_sql should convert Numeric to decimals

  #20525 commented on Mar 5, 2025 • 0 new comments

• BUG: `ValueError: Length of values (5) does not match length of index (4)` when subtracting two series with MultIndex and Index and nan values

  #60908 commented on Mar 5, 2025 • 0 new comments

• BUG: why arrow only work on mac arm？

  #60714 commented on Mar 5, 2025 • 0 new comments

• BUG: pd.concat doesn't preserve categorical dtypes

  #51362 commented on Mar 5, 2025 • 0 new comments

• ENH: add errors='coerce' to DataFrame.astype

  #48781 commented on Mar 6, 2025 • 0 new comments