pandas-dev/pandas issues and pull requests

#62708 - DOC: Explain how to load data in Google Colab

Issue - State: open - Opened by afeld about 1 month ago - 7 comments
Labels: Docs, good first issue

#62520 - BUG: Regression in Series.pow with all-NA `double[pyarrow]` values in pandas 3.x

Issue - State: closed - Opened by TomAugspurger about 2 months ago - 7 comments
Labels: Bug, Regression, Numeric Operations, good first issue, Arrow

#62437 - DOC: Replace `@Appender`, `@Substitution`, `@doc` with inlined docstrings

Issue - State: open - Opened by mroeschke 2 months ago - 24 comments
Labels: Docs, good first issue

#62435 - TST: Replace `ensure_clean` utility function with the `temp_file` pytest fixture

Issue - State: open - Opened by mroeschke 2 months ago - 25 comments
Labels: Testing, good first issue

#62434 - STY: Enforce Ruff rule B905, zip-without-explicit-strict

Issue - State: closed - Opened by mroeschke 2 months ago - 25 comments
Labels: Code Style, good first issue

#62357 - DOC: Ensure guides are linked from relevant API docs

Issue - State: open - Opened by afeld 2 months ago
Labels: Docs, good first issue

#62314 - DOC: Clarify parentheses vs. brackets

Issue - State: closed - Opened by afeld 3 months ago - 3 comments
Labels: Docs, good first issue

#61926 - BUG: Merge fails on pyarrow datetime columns

Issue - State: closed - Opened by Meet1995 4 months ago - 14 comments
Labels: Bug, Datetime, Reshaping, good first issue, Arrow

#61813 - ENH: Add Polars engine to read_csv

Issue - State: open - Opened by datapythonista 5 months ago
Labels: IO CSV, good first issue

#61733 - DOC: Index.infer_objects is missing from docs

Issue - State: closed - Opened by Dr-Irv 5 months ago
Labels: Docs, good first issue, Index

#61587 - WEB: Add table of content for the Ecosystem page

Issue - State: closed - Opened by datapythonista 6 months ago - 4 comments
Labels: good first issue, Web

#61585 - Unpin Python version in the development environment

Issue - State: open - Opened by datapythonista 6 months ago
Labels: CI, Dependencies, good first issue

#61573 - WEB: Test that our versions JSON is valid

Issue - State: closed - Opened by datapythonista 6 months ago
Labels: good first issue, Web

#61571 - DOC: Version dropdown not working

Issue - State: open - Opened by datapythonista 6 months ago
Labels: Docs, good first issue

#61557 - BUG: regex match in compliance tests no longer match pytest expected inputs

Issue - State: closed - Opened by chalmerlowe 6 months ago - 2 comments
Labels: Testing, Error Reporting, good first issue

#61531 - CI: Micromamba taking too long to resolve the environments in the CI

Issue - State: closed - Opened by datapythonista 6 months ago - 6 comments
Labels: CI, Dependencies, good first issue

#61475 - BUG: More Indicative Error when pd.melt with duplicate columns

Issue - State: closed - Opened by James-Lee-998 6 months ago - 2 comments
Labels: Bug, Reshaping, Error Reporting, good first issue

#61432 - DOC: Series.name is just Hashable, but many column arguments require str

Issue - State: closed - Opened by cmp0xff 7 months ago - 1 comment
Labels: Docs, Reshaping, good first issue

#61188 - BUG: date comparison fails when series is all pd.NaT values

Issue - State: closed - Opened by imrehg 8 months ago - 5 comments
Labels: Bug, Datetime, good first issue

#61123 - DOC: `read_excel` `nrows` parameter reads extra rows when tables are adjacent (no blank row)

Issue - State: closed - Opened by robertutterback 9 months ago - 1 comment
Labels: Docs, IO Excel, good first issue

#60942 - BUG: pd.Series.rename(..., inplace=True) returns a pd.Series and not nont

Issue - State: closed - Opened by loicdiridollou 9 months ago - 3 comments
Labels: Bug, Docs, good first issue, rename, inplace

#60750 - BUG: `pd.Series.isnumeric()` doesn't work on decimal value strings

Issue - State: closed - Opened by sf-dcp 10 months ago - 20 comments
Labels: Docs, Strings, good first issue

#60727 - DOC: Add comparison with SPSS

Issue - State: closed - Opened by afeld 10 months ago - 1 comment
Labels: Docs, good first issue

#60695 - BUG: Series constructor from dictionary drops key (index) levels when not all keys have same number of entries

Issue - State: closed - Opened by ArneBinder 11 months ago - 26 comments
Labels: Bug, MultiIndex, good first issue

#60647 - BUG: CustomBusinessDay not respecting calendar

Issue - State: open - Opened by benmgrant 11 months ago - 23 comments
Labels: Bug, Frequency, good first issue

#60378 - TST: Make test_sql.py serializable

Issue - State: open - Opened by WillAyd about 1 year ago
Labels: Testing, IO SQL, good first issue

#60275 - DOC: Document merge_cells="columns" in to_excel

Issue - State: closed - Opened by rhshadrach about 1 year ago - 2 comments
Labels: Docs, IO Excel, good first issue

#60091 - BUG: Merging on two non-monotonic `np.intc` arrays fails

Issue - State: closed - Opened by tehunter about 1 year ago - 4 comments
Labels: Bug, Reshaping, good first issue

#60084 - BUG: arithmetic can break equality-hash invariant for Timestamp during DST transition

Issue - State: closed - Opened by Kxnr about 1 year ago - 15 comments
Labels: Bug, good first issue, Needs Tests, hashing, Timestamp

#60066 - PERF: df.astype("float64[pyarrow]") is slow, df.astype("Float64") is super slow

Issue - State: closed - Opened by auderson about 1 year ago - 4 comments
Labels: Performance, good first issue, ExtensionArray, Constructors

#59950 - BUG: DataFrame.query() throws error when df has duplicate column names

Issue - State: closed - Opened by ddenuyl-bebr about 1 year ago - 12 comments
Labels: Bug, good first issue, expressions

#59904 - BUG: pd.read_csv date parsing not working with dtype_backend="pyarrow" and missing values

Issue - State: closed - Opened by mhabets about 1 year ago - 12 comments
Labels: Bug, Missing-data, IO CSV, good first issue, Needs Tests, Arrow

#59902 - docs: update `freq` description for `pd.Timedelta.ceil` to match `DatetimeIndex.ceil`'s `freq` description

Issue - State: closed - Opened by robert-nash about 1 year ago - 14 comments
Labels: Docs, Timedelta, good first issue

#59876 - BUG: `pd.options.display.float_format` did not follow left side or before decimal places format

Issue - State: closed - Opened by yasirroni about 1 year ago - 21 comments
Labels: Bug, Output-Formatting, good first issue

#59712 - BUG: groupby().any() returns True instead of False for groups where timedelta column is all null

Issue - State: closed - Opened by sfc-gh-mvashishtha about 1 year ago - 9 comments
Labels: Bug, Groupby, good first issue, Reduction Operations

#59698 - DOC: fix docstring validation errors for pandas.Timedelta/pandas.TimedeltaIndex

Issue - State: closed - Opened by natmokval about 1 year ago - 17 comments
Labels: Docs, Code Style, good first issue

#59695 - DOC: methods in see also section in the pandas.core.groupby.DataFrameGroupBy.agg are not hyperlinks

Issue - State: closed - Opened by specialkapa about 1 year ago - 4 comments
Labels: Docs, Groupby, good first issue

#59532 - DOC: Wrong bug number in what's new v3.0.0

Issue - State: closed - Opened by matsidzi over 1 year ago - 3 comments
Labels: Docs, good first issue

#59309 - pandas.Series.groupby example is not relevant

Issue - State: closed - Opened by n49o7 over 1 year ago - 6 comments
Labels: Docs, good first issue

#59130 - DOC: "Accelerated operations" talks about speedup in obsolete versions of Pandas

Issue - State: closed - Opened by wjandrea over 1 year ago - 9 comments
Labels: Docs, good first issue

#59095 - DOC: to_sql docs should mention ADBC

Issue - State: closed - Opened by WillAyd over 1 year ago - 2 comments
Labels: Docs, good first issue

#59010 - DOC: Link to SPEC 0 instead of NEP 29

Issue - State: closed - Opened by Aloqeely over 1 year ago - 2 comments
Labels: Docs, good first issue

#58824 - DOC: Enhance the docstrings to provide more detailed explanations for the functions and their parameters in Common.py

Issue - State: closed - Opened by himanshurd over 1 year ago - 3 comments
Labels: Docs, good first issue

#58713 - BUG: pd.merge fail with numpy.uintc on Windows

Issue - State: closed - Opened by Noname37486 over 1 year ago - 4 comments
Labels: Bug, Reshaping, Windows, good first issue

#58667 - DEPR: Deprecate method argument of reindex_like

Issue - State: closed - Opened by WillAyd over 1 year ago - 4 comments
Labels: Enhancement, Deprecate, good first issue

#58465 - PERF: shift() of boolean series gives drawdown by an order of magnitude with default filling np.NaN comparing with filling by bool like False

Issue - State: closed - Opened by TsiVit over 1 year ago - 7 comments
Labels: Docs, good first issue, Transformations

#58446 - BUG: `groupby.agg` with `as_index=False` and duplicate columns in `by` fails with `pd.NamedAgg`.

Issue - State: closed - Opened by sfc-gh-rdurrani over 1 year ago - 5 comments
Labels: Groupby, Apply, good first issue, Needs Tests

#58065 - DOC: Enforce Numpy Docstring Validation | pandas.DataFrame

Issue - State: closed - Opened by jordan-d-murphy over 1 year ago - 33 comments
Labels: Docs, good first issue

#57831 - DOC: Remove Dask and Modin sections in `scale.rst` in favor of linking to ecosystem docs.

Issue - State: closed - Opened by mroeschke over 1 year ago - 3 comments
Labels: Docs, good first issue

#57792 - BUG: read_csv inconsistent behavior

Issue - State: closed - Opened by fgr1986 over 1 year ago - 7 comments
Labels: Docs, IO CSV, good first issue

#57457 - BUG: Endianness problem with weird data types and shape

Issue - State: closed - Opened by ilan-gold almost 2 years ago - 6 comments
Labels: Bug, good first issue, Needs Tests

#57443 - DOC: fix GL08 errors in docstrings

Issue - State: closed - Opened by jordan-d-murphy almost 2 years ago - 17 comments
Labels: Docs, CI, good first issue

#57440 - DOC: fix ES01 errors in docstrings

Issue - State: closed - Opened by jordan-d-murphy almost 2 years ago - 13 comments
Labels: Docs, CI, good first issue

#57438 - DOC: fix PR01 errors in docstrings

Issue - State: closed - Opened by jordan-d-murphy almost 2 years ago - 11 comments
Labels: Docs, CI, good first issue

#57419 - DOC: Add example for DataFrame.pow

Issue - State: closed - Opened by datapythonista almost 2 years ago
Labels: Docs, Numeric Operations, good first issue

#57392 - DOC: fix SA05 errors in docstrings

Issue - State: closed - Opened by jordan-d-murphy almost 2 years ago - 29 comments
Labels: Docs, CI, good first issue

#57259 - DOC: `CategoricalDtype` equality semantics aren't completely described

Issue - State: closed - Opened by VladimirFokow almost 2 years ago - 12 comments
Labels: Docs, Categorical, good first issue

#57248 - BUG: breaking type annotation of `format_percentiles` function in `io/formats/format.py`

Issue - State: closed - Opened by FrostMegaByte almost 2 years ago - 1 comment
Labels: Bug, good first issue, Typing

#57217 - WEB: Broken link to Anaconda

Issue - State: closed - Opened by rhshadrach almost 2 years ago - 1 comment
Labels: good first issue, Web

#57111 - DOC: fix PR02 errors in docstrings

Issue - State: closed - Opened by jordan-d-murphy almost 2 years ago - 35 comments
Labels: Docs, CI, good first issue

#57099 - Community slack link broken

Issue - State: closed - Opened by shriyakalakata almost 2 years ago - 4 comments
Labels: Docs, good first issue, Community

#57092 - DOC: `Series.interpolate` and `DataFrame.Interpolate` refer to methods that are no longer there.

Issue - State: closed - Opened by caneff almost 2 years ago - 3 comments
Labels: Docs, Missing-data, good first issue

#57088 - DOC: `DataFrame.any()` and `DataFrame.all()` documentation specifies the wrong return types

Issue - State: closed - Opened by caneff almost 2 years ago - 6 comments
Labels: Docs, good first issue, Reduction Operations

#57087 - BUG: `DataFrame.any()` inconsistent with other methods

Issue - State: closed - Opened by caneff almost 2 years ago - 5 comments
Labels: good first issue, API - Consistency, Reduction Operations

#56972 - DOC: Clarifying Terminology: "Brackets" vs "Parentheses"

Issue - State: closed - Opened by vertigoa almost 2 years ago - 7 comments
Labels: Docs, IO Data, good first issue

#56876 - DOC: Remove references to `AxesSubPlot`

Issue - State: closed - Opened by Dr-Irv almost 2 years ago - 5 comments
Labels: Docs, Groupby, Visualization, good first issue, Typing

#56853 - BUG: Insert then delete column into MultiIndex with timestamps leads to RecursionError

Issue - State: closed - Opened by traubms almost 2 years ago - 7 comments
Labels: Bug, Indexing, MultiIndex, good first issue, Needs Tests

#56804 - DOC: fix EX03 errors in docstrings

Issue - State: closed - Opened by natmokval almost 2 years ago - 65 comments
Labels: Docs, Code Style, good first issue

#56717 - TST: test for Styler.applymap_index

Issue - State: closed - Opened by natmokval almost 2 years ago - 7 comments
Labels: Testing, good first issue

#56716 - CLN: Use assert_produces_warning instead of pytest.raises to show FutureWarning

Issue - State: closed - Opened by natmokval almost 2 years ago - 5 comments
Labels: Testing, Clean, good first issue

#56712 - BUG: Interchange protocol implementation does not handle `timestamp[ns][pyarrow]` type correctly

Issue - State: closed - Opened by stinodego almost 2 years ago - 4 comments
Labels: good first issue, Needs Tests, Interchange

#56652 - BUG: Pyarrow implementation of str.fullmatc matches partial string

Issue - State: open - Opened by sjnarmstrong almost 2 years ago - 4 comments
Labels: Bug, Strings, good first issue, Arrow

#56607 - BUG: Series.diff does no arg validation unlike df.diff for `periods`

Issue - State: closed - Opened by sfc-gh-rdurrani almost 2 years ago - 8 comments
Labels: Bug, Error Reporting, good first issue, Transformations

#56592 - BUG: Docs won't build (S3 bucket does not exist)

Issue - State: closed - Opened by johnstacy almost 2 years ago - 11 comments
Labels: Docs, good first issue

#56475 - DOC: Add note about `git fetch upstream --tags` to contributing guide

Issue - State: closed - Opened by WillAyd almost 2 years ago - 2 comments
Labels: Docs, good first issue

#56330 - BUG: df.mask with int df throws ValueError instead of TypeError

Issue - State: closed - Opened by sfc-gh-rdurrani almost 2 years ago - 9 comments
Labels: Bug, Error Reporting, good first issue

#56283 - BUG: `.style.bar` doesn't work with missing pyarrow values

Issue - State: closed - Opened by mattharrison almost 2 years ago - 1 comment
Labels: good first issue, Needs Tests, Styler

#55969 - BUG: Strange behavior when accessing datetime.date index with np.datetime64

Issue - State: open - Opened by yavitzour about 2 years ago - 2 comments
Labels: Bug, Indexing, good first issue, Needs Tests

#55843 - Internal `read_excel()` typing for `index_col` is incorrect

Issue - State: closed - Opened by Dr-Irv about 2 years ago - 5 comments
Labels: IO Excel, good first issue, Typing

#55776 - BUG: Parquet size grows exponential for categorical data

Issue - State: closed - Opened by aseganti about 2 years ago - 13 comments
Labels: Docs, Categorical, IO Parquet, good first issue

#55489 - BUG: pandas.read_excel() with dtype=object is broken in pandas 2.1.1

Issue - State: closed - Opened by VisualDev-FR about 2 years ago - 8 comments
Labels: Docs, IO Excel, good first issue

#55311 - DOC: Issue triage updates

Issue - State: closed - Opened by rhshadrach about 2 years ago - 13 comments
Labels: Docs, good first issue

#55224 - BUG: Series.value_counts with sort=False returns result sorted on values for Series with string dtype

Issue - State: closed - Opened by CynthiaLuijkx about 2 years ago - 13 comments
Labels: Bug, Algos, good first issue, ExtensionArray

#55148 - BUG: MultiIndex.levels[x] of sliced DataFrame returns values from the non-sliced index

Issue - State: closed - Opened by ilCatania about 2 years ago - 6 comments
Labels: Docs, MultiIndex, good first issue

#54836 - TST: Add tests for DataFrame/Series.value_counts with missing categories

Issue - State: closed - Opened by rhshadrach about 2 years ago - 2 comments
Labels: Algos, Categorical, good first issue, Needs Tests

#54727 - ENH: make guess_datetime_format public

Issue - State: closed - Opened by joefutrelle over 2 years ago - 14 comments
Labels: Enhancement, Timeseries, good first issue

#54492 - DOC: tzdata should be listed as a required dependency since 2.0.0

Issue - State: closed - Opened by iansheng over 2 years ago - 3 comments
Labels: Docs, good first issue

#54409 - BUG: loc fails with tz_aware DateTimeIndex

Issue - State: closed - Opened by 0x26res over 2 years ago - 5 comments
Labels: Bug, Indexing, Timezones, good first issue, Needs Tests

#54315 - TST: div/truediv with PyArrow duration types

Issue - State: closed - Opened by phofl over 2 years ago - 9 comments
Labels: Timedelta, good first issue, Arrow

#54229 - DEPR: Positional arguments in to_* I/O methods

Issue - State: closed - Opened by lithomas1 over 2 years ago - 20 comments
Labels: IO Data, Deprecate, good first issue

#54206 - BUG: Grouped rank incorrect behaviour with nullable types

Issue - State: closed - Opened by NMAC427 over 2 years ago - 4 comments
Labels: Bug, Groupby, good first issue, NA - MaskedArrays, Transformations

#54191 - BUG: `convert_dtypes(dtype_backend="pyarrow")` converts `"timestamp[ms][pyarrow]"` to `"timestamp[ns][pyarrow]"`

Issue - State: closed - Opened by randolf-scholz over 2 years ago - 5 comments
Labels: good first issue, Needs Tests

GitHub / pandas-dev/pandas issues and pull requests