DOC: Single Document For Code Guidelines Docs Style good first issue

#33851 opened Apr 28, 2020 by Stockfoot

7

BUG: Can't disable progress bar for read_gbq Bug IO Google good first issue

#33360 opened Apr 7, 2020 by de-code

5

Empty error message in tz_localize Error Reporting good first issue

#32967 opened Mar 24, 2020 by quangngd

4

BUG: User-facing AssertionError in Series.to_timestamp Bug Error Reporting good first issue

#33327 opened Apr 6, 2020 by TomAugspurger

10

Use empty_frame fixture Needs Discussion Testing

#33161 opened Mar 31, 2020 by WillAyd

3

Plotting Int64 columns with nulled integers (NAType) fails Bug NA - MaskedArrays Visualization good first issue

#32073 opened Feb 18, 2020 by Khris777

11

CLN remove unreachable code in pandas/core/groupby/generic.py::DataFrameGroupBy::_wrap_applied_output good first issue

#33478 opened Apr 11, 2020 by MarcoGorelli

13

DOC: rename_axis 'columns' param Docs good first issue

#33564 opened Apr 15, 2020 by Toussaic

8

ENH: support in-memory HDFStore Docs Enhancement IO HDF5 good first issue

#33166 opened Mar 31, 2020 by tgy

7

Fix capitalization among headings in documentation files Docs good first issue

#32550 opened Mar 9, 2020 by tonywu1999

23

Does #28827 also apply to applymap? Docs good first issue

#31620 opened Feb 3, 2020 by MarcoGorelli

3

DOC: Standardize references to pandas in the documentation Docs good first issue

#32316 opened Feb 28, 2020 by mroeschke

7

DOC: Remove tips and tricks section page from the wiki Clean Docs good first issue

#30964 opened Jan 13, 2020 by datapythonista

3

Series with NAMED period index raise error on groupby index.month (pandas 1.0 specific) Groupby Needs Tests Period good first issue

#32108 opened Feb 19, 2020 by daxid

13

CI: Notifications when a job in GitHub Actions fails CI good first issue

#32301 opened Feb 27, 2020 by datapythonista

BUG: segmentation fault with pd.NA and np.ndarray.__contains__ Needs Tests good first issue

#31922 opened Feb 12, 2020 by jorisvandenbossche

4

[Good first issue] TST: Disallow bare pytest.raises Style Testing good first issue

#30999 opened Jan 14, 2020 by MomIsBestFriend

35

Move 'For Developers' content from wiki to contributing docs. Docs good first issue

#30232 opened Dec 12, 2019 by simonjayhawkins

12

Misleading error messages when opening inexistent json file Enhancement Error Reporting IO JSON good first issue

#29102 opened Oct 19, 2019 by datapythonista

6

Possible regression in comparison operation for interval dtypes Needs Tests good first issue

#28981 opened Oct 14, 2019 by dsaxton

4

Pandas wrongly read csr_matrix with explicit 0 Needs Tests good first issue

#28992 opened Oct 15, 2019 by PrimozGodec

5

CI: Speed up coverage tests by splitting files CI Testing good first issue

#29671 opened Nov 17, 2019 by datapythonista

16

CI/TST: Better information about the tests in azure-pipelines CI good first issue

#29214 opened Oct 25, 2019 by datapythonista

3

Improve docs on what the axis= kwarg does in individual functions/methods Docs good first issue

#29203 opened Oct 24, 2019 by dlukes

4

HDF file compression not working IO HDF5 good first issue

#29310 opened Oct 31, 2019 by WuraolaOyewusi

20

DOC: add hvplot as option to plotting.backend Docs Needs Triage

#33730 opened Apr 22, 2020 by raybellwaves

"Cannot compare tz-naive and tz-aware datetime-like objects" when querying DatetimeIndex Needs Tests good first issue

#29463 opened Nov 7, 2019 by hjfreyer

6

Better Message for xlrd Dependencies Enhancement Error Reporting IO Excel good first issue

#28546 opened Sep 20, 2019 by WillAyd

21

Alignment of CategoricalIndex will convert the index to int type? Needs Tests good first issue

#28397 opened Sep 12, 2019 by bingtangben

2

DataFrame.dropna() not working with sparse columns Needs Tests good first issue

#28287 opened Sep 4, 2019 by rjboczar

3

BUG: Undocumented behaviour of MultiIndex.rename Bug Docs

#33778 opened Apr 24, 2020 by simonjayhawkins

tm.external_error_raised instead of tm.assertRaises in the documentation Docs Testing

#33434 opened Apr 9, 2020 by SurajH1

2

BUG: groupby on columns does not work with Series Bug Docs Groupby

#33842 opened Apr 28, 2020 by FlorentinGerard

4

Replace old string formatting syntax with f-strings Style good first issue

#29547 opened Nov 11, 2019 by MomIsBestFriend

121

Fix mypy errors for pandas\tests\* Typing good first issue

#28926 opened Oct 11, 2019 by simonjayhawkins

20

DataFrame.to_html col_space parameter to change width of a specific column only Enhancement IO HTML good first issue

#28917 opened Oct 11, 2019 by questglobal-bom

3

BUG: merge left and merge inner produce different index-order Docs Reshaping

#33554 opened Apr 14, 2020 by rwijtvliet

4

Explain how and when to use indirect fixtures Docs Testing

#33128 opened Mar 29, 2020 by SaturnFromTitan

DOC: `contributing` page isn't rendered properly Docs

#32732 opened Mar 15, 2020 by charlesdong1991

1

`pandas.Index.slice_locs` when label not found Docs Indexing

#32680 opened Mar 13, 2020 by albertotb

DOC: lreshape and wide_to_long references Docs

#33417 opened Apr 9, 2020 by tpanza

DOC: Getting started tutorials feedback from EOSS meeting Docs

#32283 opened Feb 27, 2020 by mroeschke

4

DOC: Fix SA04 errors in docstrings Docs good first issue

#28792 opened Oct 4, 2019 by ChiefMilesEdgeworth

9

ENH: favor columns over index levels when groupby-ing over ambiguous label Docs Enhancement

#33657 opened Apr 19, 2020 by toobaz

Add base test for ExtensionArray.astype and copy ExtensionArray good first issue

#28488 opened Sep 17, 2019 by TomAugspurger

7

DOC: pd.Categorical does not throw ValueError, converts to NaN instead Docs

#33696 opened Apr 21, 2020 by behrenhoff

3

DOC:https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.reindex.html#pandas.DataFrame.reindex Docs

#33888 opened Apr 30, 2020 by 2bon

2

BUG: TimeDeltaIndex slicing with strings incorrectly includes too much data Docs Indexing Timedelta

#33603 opened Apr 17, 2020 by pbotros

2

DOC: Fix Dataframe.apply documentation to include note regarding calling function twice on first element Docs Needs Triage

#33879 opened Apr 29, 2020 by alonme

DOC: Be explicit whether a view or copy is returned Docs

#33451 opened Apr 10, 2020 by FSpanhel

MultiIndex.is_monotonic_increasing Docs

#32179 opened Feb 22, 2020 by xin-jin

9

DOC: See also missing links in GroupBy.apply(), GroupBy.pipe() Docs

#31661 opened Feb 4, 2020 by srvanrell

6

Diff on sparse dtype Needs Tests good first issue

#28813 opened Oct 7, 2019 by thedimlebowski

1

“Advanced SQLAlchemy queries” in Pandas 1.0.1 Document Docs IO SQL

#32147 opened Feb 21, 2020 by xushengun

Fix PR02 issues in docstrings Clean Docs good first issue

#27976 opened Aug 17, 2019 by datapythonista

8

Deprecate using `xlrd` engine in favor of openpyxl Deprecate IO Excel good first issue

#28547 opened Sep 20, 2019 by WillAyd

15

DOC: improve readability of signature description (type hints) Docs

#33025 opened Mar 25, 2020 by normanius

7

DOC: Mention that boolean indexing is impossible for new nullable integer/boolean and string data types when they contain missing values Docs

#31537 opened Feb 1, 2020 by tdpetrou

2

CLN: Update docstring decorator from Appender and Substitution to doc Docs

#31942 opened Feb 13, 2020 by HH-MWB

6

DOC/API: Discussion on whether __finalize__ is public Docs Needs Discussion metadata

#33338 opened Apr 6, 2020 by TomAugspurger

2

DOC: Fix formatting errors in docstrings Docs good first issue

#27977 opened Aug 17, 2019 by datapythonista

5

replace() involving booleans affects integers and floats equal to 0 and 1 Bug Docs replace

#31633 opened Feb 3, 2020 by krassowski

4

DOC: Parameters name and fastpath of Series are not documented Docs good first issue

#27178 opened Jul 2, 2019 by timhoffm

3

Clean Up Sphinx Warnings Docs

#31090 opened Jan 16, 2020 by WillAyd

4

TST: Split test_offsets.py Frequency Refactor Testing good first issue

#27085 opened Jun 27, 2019 by mroeschke

6

HDF5 API docs missing methods Docs IO HDF5

#31050 opened Jan 15, 2020 by kylekeppler

4

Pandas import breaks when setting filterwarnings Needs Tests good first issue

#26367 opened May 13, 2019 by jorisvandenbossche

5

Add more pytest idiom to io.excel testing Clean IO Excel Master Tracker Testing good first issue

#26784 opened Jun 11, 2019 by simonjayhawkins

6

DOC: Remove :okwarning: from scale guide when used dask version is not raising FutureWarning anymore Docs

#29960 opened Dec 2, 2019 by SaturnFromTitan

DOC: Fix docstring quotes in pandas.tseries Docs good first issue

#26982 opened Jun 21, 2019 by datapythonista

4

DOC: intended series.loc behavior undocumented for boolean series Docs Indexing

#31054 opened Jan 15, 2020 by hickmanw

1

The IntervalIndex documentation makes no mention of IntervalIndex.get_loc Docs Interval

#31073 opened Jan 16, 2020 by dumbledad

5

groupby apply failed on dataframe with DatetimeIndex Needs Tests good first issue

#26182 opened Apr 22, 2019 by goldenbull

7

Docs request: Specifying behavior of `dtype` parameter Docs

#30291 opened Dec 16, 2019 by christina-zhou-96

1

pandas._testing.assert_produces_warning docstring unclear? Docs

#31453 opened Jan 30, 2020 by MarcoGorelli

Update DataFrame.to_feather() docstring/api documentation and deprecate fname argument. API - Consistency Deprecate Docs IO Parquet

#29532 opened Nov 10, 2019 by simonjayhawkins

Put some marker in the DOCs for functions need in previous installed modules or drivers Docs

#29689 opened Nov 18, 2019 by VasilijKolomiets

2

WEB: Add link from the docs to the web Docs Web

#30896 opened Jan 10, 2020 by datapythonista

3

Fix SS03 Issues in Docstrings Docs

#29315 opened Nov 1, 2019 by deepandas11

5

DOC: Remove and disable wiki Docs Needs Discussion

#30410 opened Dec 22, 2019 by datapythonista

3

Improve docs for pandas_version in Dataframe to_json(orient='table') Docs IO JSON good first issue

#26637 opened Jun 3, 2019 by shsnyder

6

Recommended way to check for sparse data (DataFrame or Series) Enhancement Sparse good first issue

#26706 opened Jun 7, 2019 by jorisvandenbossche

33

WEB/DOC: integration of the main website and documentation Docs Web

#28580 opened Sep 23, 2019 by jorisvandenbossche

10

DOC: collect feedback on new sphinx documentation theme Docs

#28952 opened Oct 13, 2019 by jorisvandenbossche

19

Fix PR06 issues in docstrings Docs

#28724 opened Oct 1, 2019 by LauraCollard

3

docs: cheat sheet not opening (infinite redirect loop) Docs

#28937 opened Oct 12, 2019 by slokhorst

8

Improve fname documentation for to_parquet Docs IO Parquet

#29476 opened Nov 8, 2019 by larroy

7

DOC: diff() when using unsigned ints Docs

#28909 opened Oct 10, 2019 by jjlkant

DOC: DataFrame.mask() uses df.where in the examples section Docs good first issue

#25187 opened Feb 6, 2019 by miguelfg

3

Using "index" in a Series with a dict produces results inconsistent with documentation. Docs

#28418 opened Sep 12, 2019 by jsal13

6

Fixing docstrings that don't end with a period Docs

#27979 opened Aug 17, 2019 by Aya-S

3

Fix validation error type `GL01` and check in CI CI Docs Style good first issue

#25324 opened Feb 14, 2019 by MarckK

4

DOC: Remove docs code header and use explicit imports in the user guide Docs

#28038 opened Aug 20, 2019 by datapythonista

20

concat(..., copy=False) with datetime tz-aware data raises ValueError: cannot create a DatetimeTZBlock without a tz Needs Tests good first issue

#25257 opened Feb 10, 2019 by karldw

8

DOC: Docstrings Formatting Error PR09 Docs

#28602 opened Sep 24, 2019 by HughKelley

8

Fix SS06 Issues in docstrings Docs

#29254 opened Oct 28, 2019 by profwacko

8

Fix PR06 errors in docstrings ('Parameter "{param_name}" type should use "{right_type}" instead of "{wrong_type}"') Docs

#28253 opened Sep 2, 2019 by danielplawrence

4

sample from Series should never return empty series Docs

#28495 opened Sep 18, 2019 by roelhogervorst

5

BUG: DataFrame[Sparse] quantile fails because SparseArray has no reshape Needs Tests good first issue

#24600 opened Jan 3, 2019 by jbrockmendel

5

DOC: Docstrings Formatting error PR09,PR08 in pandas.DataFrame Docs

#28702 opened Oct 1, 2019 by josibake

DEPR: deprecate pandas/io/date_converters.py Deprecate IO CSV Timeseries good first issue

#24518 opened Dec 31, 2018 by mroeschke

6

TST/ENH: add default values check to validate_docstrings.py Docs

#28701 opened Oct 1, 2019 by josibake

1

Fix validation error type `PR02` and check in CI CI Docs Style good first issue

#25376 opened Feb 19, 2019 by MarckK

8

DOC/Discussion: Update docstrings guide to include guidance for edge cases Docs

#28784 opened Oct 4, 2019 by josibake

1

Add a "Best Practices" document Docs

#27483 opened Jul 19, 2019 by TomAugspurger

4

DataFrame constructor ignores integer dtype when dict-data and non-overlapping columns Needs Tests good first issue

#24386 opened Dec 21, 2018 by TomAugspurger

2

Assigning values breaks in different ways when duplicate column names Needs Tests good first issue

#24798 opened Jan 16, 2019 by user347

7

New pandas website Docs Needs Discussion

#27870 opened Aug 12, 2019 by datapythonista

5

Examples for Series ops should be specific to each method. Docs good first issue

#24589 opened Jan 3, 2019 by timgeb

12

DataFrameGroupby.resample with the `on` keyword does not produce the same output as on DateTimeIndex Docs Groupby Resample Timeseries

#27343 opened Jul 11, 2019 by philippegr

4

DOC: Validation of docsting validates Python type doc CI Docs

#27055 opened Jun 26, 2019 by datapythonista

2

Fix validation error type `SA04` and check in CI CI Docs Style good first issue

#25337 opened Feb 15, 2019 by MarckK

2

Fix validation error type `PR08` and check in CI CI Docs Style good first issue

#25232 opened Feb 8, 2019 by MarckK

3

DOC: Validation errors on doctests with output too long for a single line Docs

#27308 opened Jul 9, 2019 by mpmoran

1

qcut fails with labels=True Docs cut

#26963 opened Jun 20, 2019 by RoyalTS

3

Fix validation error type `GL04` and check in CI Docs good first issue

#25106 opened Feb 3, 2019 by kynan

4

Fix validation error type `SS03` and check in CI CI Docs Style good first issue

#25306 opened Feb 13, 2019 by MarckK

5

Document DataFrame._constructor_sliced-like property in the public API? API Design Docs

#27824 opened Aug 8, 2019 by TomAugspurger

3

DOC/TST: provide documentation & testing on groupby filtering & aggregation ops for EA Categorical Docs ExtensionArray Testing

#27078 opened Jun 27, 2019 by jreback

Series to_json Docstring Updates Docs IO JSON good first issue

#23584 opened Nov 8, 2018 by notnami

9

BUG: maybe_infer_to_datetimelike incorrect on 2D inputs Needs Tests good first issue

#23988 opened Nov 29, 2018 by jbrockmendel

4

DOC: Add glossary to the documentation Docs Needs Discussion

#27019 opened Jun 24, 2019 by datapythonista

2

SparseDataFrame.to_coo does not convert the default fill value when is not 0 Error Reporting Missing-data Sparse good first issue

#24817 opened Jan 17, 2019 by gm-spacagna

9

Dataframe.mean with numeric_only=False results in error with strings Docs Dtypes

#26927 opened Jun 18, 2019 by smangham

7

Make documentation runnable on binder Docs

#27514 opened Jul 22, 2019 by TomAugspurger

2

Fix validation error type `SS02` and check in CI CI Docs Style good first issue

#25113 opened Feb 3, 2019 by kynan

3

DOC: scripts/validate_docstrings.py should clean up files created from docstrings Docs good first issue

#24209 opened Dec 10, 2018 by mroeschke

9

ENH: add asv's which include EAs where appropriate ExtensionArray Performance good first issue

#24351 opened Dec 19, 2018 by jreback

5

1.0.1 on conda - doc change or pushing to main conda channel?

#31835 opened Feb 9, 2020 by discdiver

2

Inconsistant behaviour of empty groups when grouping with one vs. many Needs Tests good first issue

#23865 opened Nov 23, 2018 by mojones

7

[QST] Clarify when `agg()` will return groups as index API - Consistency Groupby

#32579 opened Mar 10, 2020 by shwina

DOC: IPython code blocks without In/Out prompts? Docs Needs Discussion

#26790 opened Jun 11, 2019 by jorisvandenbossche

Add a "scope" document Docs

#27649 opened Jul 29, 2019 by TomAugspurger

sort_index not sorting when multi-index made by different categorical types Needs Tests good first issue

#24271 opened Dec 13, 2018 by wiso

2

'BinOp' object has no attribute 'value' Issue while calling global functions in eval and importing numpy Bug expressions

#24670 opened Jan 8, 2019 by anjsudh

6

Allow some way of specifying 'isoformat' as the 'date_format' parameter in 'to_csv' methods Docs Timeseries

#27328 opened Jul 10, 2019 by nugend

5

step option does not work for hist Needs Tests Visualization good first issue

#23992 opened Nov 29, 2018 by orena1

6

Link from, for e.g., version/0.22/generate, to stable/reference Docs

#26922 opened Jun 18, 2019 by dumbledad

2

Column headers out of alignment in 10 MInutes tutorial Docs

#26955 opened Jun 20, 2019 by vlbrown

3

DOC: Error in pd.cut documentation example regarding IntervalIndex usage. Docs

#27319 opened Jul 10, 2019 by msznajder

6

DOCS SUGGESTION for pd.MultiIndex (Output of df.index.levels)

#32595 opened Mar 10, 2020 by jhl0204

to_json should make separators configurable (similar to json.dump) Enhancement IO JSON

#33014 opened Mar 25, 2020 by bersbersbers

6

reorder_categories() on categorical index of interval values produces bizarre results Needs Tests good first issue

#23452 opened Nov 1, 2018 by tmelconian

2

CI: build documentation for Windows CI Docs Needs Discussion Windows

#26574 opened May 30, 2019 by simonjayhawkins

5

Document `DataError` in the API Error Reporting

#32584 opened Mar 10, 2020 by shwina

1

Missing `GL06` and `GL07` errors for invalid docstrings Docs Style

#26307 opened May 7, 2019 by Scowley4

3

Groupby with multiple aggregations doesn't pass through positional or keyword arguments. Docs Groupby

#26611 opened Jun 1, 2019 by TomAugspurger

1

DISC: Validating internal docstring presence, completeness and style CI Needs Discussion Style

#32773 opened Mar 17, 2020 by simonjayhawkins

25

Can't combine DatetimeIndex MultiIndex with numeric MultiIndex Needs Tests good first issue

#23478 opened Nov 4, 2018 by nackerley

3

DOC: more specific str.split() explanation Docs

#25549 opened Mar 5, 2019 by RuMcClu

2

`read_spss` only accepts `str`, not `Path` API - Consistency IO Data

#33666 opened Apr 20, 2020 by cantudiaz

pandas.cut: the 'include_lowest' argument isn't behaving as documented Docs good first issue

#23164 opened Oct 15, 2018 by evarga

5

DOC: Generating docs doesn't work if path has whitespaces Docs good first issue

#22836 opened Sep 26, 2018 by datapythonista

15

Docstring Validator Fails when 'integer' is valid argument Docs

#25205 opened Feb 7, 2019 by WillAyd

1

DOC: make scripts/validate_docstrings.py GL01 GL02 be able to exclude a list of known docstrings to ignore Docs

#25120 opened Feb 3, 2019 by dcreekp

Consistent dtype output for element wise operations on empty dataframes

#32802 opened Mar 18, 2020 by benmatwil

Dataframe agg method passing as list Apply Docs Usage Question

#25454 opened Feb 26, 2019 by scottboston

3

DOC: ongoing fixing of doctests Docs good first issue

#22459 opened Aug 22, 2018 by jorisvandenbossche

5

Fix Validation Script to Not Error Out if Bullet Points Don't End with Period CI Docs

#25461 opened Feb 27, 2019 by WillAyd

1

DOC: Meaning of Timestamp `freq` attribute is unclear in docs Docs Timeseries

#25239 opened Feb 9, 2019 by nmusolino

3

rank() for int64 gives NAN for most negative value Algos Bug

#32859 opened Mar 20, 2020 by karthikeyann

1

low_memory=True in read_csv leads to non documented, silent errors Docs Error Reporting IO CSV good first issue

#22194 opened Aug 3, 2018 by diegoquintanav

5

MultiIndex has problem selecting columns if one of the levels is tuples instead of str or int

#32902 opened Mar 22, 2020 by zachary822

DOC: add "experimental" warning to some new array-related features? Docs

#24673 opened Jan 8, 2019 by jorisvandenbossche

1

Incorrect dtype for concat with empty float and datetime columns Bug Dtypes Reshaping Timeseries

#32934 opened Mar 23, 2020 by TomAugspurger

Type hint of DataFrame(...dtype...) excludes numpy scalar types such as np.int8 Constructors Typing

#31872 opened Feb 11, 2020 by tomasssalles

DOC: Implement script to validate list indentation in docs CI Docs Style good first issue

#21520 opened Jun 18, 2018 by datapythonista

5

ExtensionArray.astype docstring Docs

#24773 opened Jan 14, 2019 by andrewgsavage

1

rolling apply gives different output when raw = True or raw = False Apply Docs Window

#25689 opened Mar 12, 2019 by NGJROMO

3

TypeError: dtype '<class 'datetime.datetime'>' not understood Docs

#25730 opened Mar 14, 2019 by dickreuter

8

ENH/API: allow different values for labels/index in DF.reindex __OR__ raise error Error Reporting good first issue

#21685 opened Jun 29, 2018 by h-vetinari

11

PERF: short-circuit (left == right).all() comparisons Performance

#32339 opened Feb 28, 2020 by jbrockmendel

4

Series with dtype=object does unexpected type conversion Needs Tests good first issue

#21881 opened Jul 12, 2018 by AllenDowney

4

BUG: weird behaviour of pivot_table when aggfunc tries to join string sequence containing None Bug Needs Triage

#33849 opened Apr 28, 2020 by jkukul

1

TST: add Feather V2 round-trip test IO Parquet Testing

#33810 opened Apr 26, 2020 by jreback

3

DOC: Update ecosystem.rst Docs

#24927 opened Jan 25, 2019 by TomAugspurger

2

IOError: [Errno 2] while building pandas doc Build Docs Linux Windows

#25258 opened Feb 10, 2019 by justineuroHP

3

Don't force conversion to list in to_sql with method callable IO SQL

#31846 opened Feb 10, 2020 by RoyalTS

pandas.DataFrame.rolling should accept Timedelta not DateOffset Docs Window

#24900 opened Jan 24, 2019 by trendelkampschroer

6

DOC: Missing PandasArray methods in API Docs

#24507 opened Dec 30, 2018 by datapythonista

4

BUG: Index.astype does not localize to UTC first like Series.astype with datetime64[ns, tz] dtypes Bug Timezones

#33401 opened Apr 8, 2020 by mroeschke

`groupby().first()` docs should explain distinction between nth and first Groupby

#27578 opened Jul 25, 2019 by kyleabeauchamp

3

read_html docs inconsistent with behaviour if lxml not installed Bug IO HTML

#30281 opened Dec 15, 2019 by attack68

1

assignment with datetime64[ns, UTC] raises TypeError Bug Regression Timeseries Timezones

#32395 opened Mar 2, 2020 by Lmmejia11

4

Update plot docs when backend is set. Visualization

#28618 opened Sep 25, 2019 by TomAugspurger

2

BUG: unstack() does not always sort index in 0.23 Docs Testing good first issue

#21675 opened Jun 29, 2018 by jzwinck

10

Unexpected behavior of the str attribute which is working with Series of list Docs Indexing Strings

#25240 opened Feb 9, 2019 by fran6w

4

DOC: validate_docstrings.py should indicate the line numbers of PEP8 violations Docs Enhancement

#24970 opened Jan 27, 2019 by dsaxton

4

DOC: Reorganization of the documentation Docs Needs Discussion

#24499 opened Dec 30, 2018 by datapythonista

14

set_index with multiindex silently converts None to NaN Bug Missing-data Reshaping

#30866 opened Jan 9, 2020 by selik

1

BLD: Clang error while installing snappy in requirements-dev.txt Dependencies

#32417 opened Mar 3, 2020 by kendricng

23

changing order of keys? Algos Bug DataFrame Docs

#24730 opened Jan 11, 2019 by epierson9

4

concat with same column names Reshaping

#30776 opened Jan 7, 2020 by krishnachouhan

3

MyPy Error Codes Typing

#29197 opened Oct 24, 2019 by WillAyd

1

API: require scalar result from the scalar .at indexer API Design Needs Discussion

#33153 opened Mar 30, 2020 by jorisvandenbossche

19

corr return without duplicates and sorted by correlation strength Docs Needs Discussion Numeric

#24728 opened Jan 11, 2019 by chrisluedtke

3

DOC: Template Timestamp & NaT docstrings Docs Timeseries

#23458 opened Nov 2, 2018 by mroeschke

2

DOC: Redirect old whatsnew links Docs

#23695 opened Nov 14, 2018 by TomAugspurger

7

dtype change when doing operations on dataframes Bug NA - MaskedArrays

#32822 opened Mar 19, 2020 by thedimlebowski

2

concat with Misaligned Column Labels and Extension Types loses Dtype ExtensionArray Reshaping

#33027 opened Mar 25, 2020 by WillAyd

pd.Series.equals() fails for Series containing iterable objects Needs Tests good first issue

#20676 opened Apr 13, 2018 by bfollinprm

4

tm.assert_series_equal checking on Integer EA should be exact by default? Testing

#30347 opened Dec 19, 2019 by simonjayhawkins

3

Tick DateOffset Normalize whatsnew entry has an error Docs good first issue

#21564 opened Jun 20, 2018 by TomAugspurger

13

BUG: concat_{categorical, compat} leads to erroneous result on non-ns datetime-EA Bug Needs Triage

#33331 opened Apr 6, 2020 by xhochy

3

Index name assignment resolution logic changes depending on whether DataFrame has any rows

#31368 opened Jan 27, 2020 by tlaytongoogle

2

is_list_like should return false for tuples API Design Bug Docs Internals

#24702 opened Jan 10, 2019 by toobaz

3

API/BUG: center=True in expanding operations returns non-sensical results Bug Window good first issue

#20647 opened Apr 10, 2018 by jorisvandenbossche

9

Clarify how to cite pandas in scientific papers Docs

#24036 opened Dec 1, 2018 by JoKeyser

28

to_datetime gives todays date when coercing errors of time values Docs Needs Discussion Timeseries

#23447 opened Nov 1, 2018 by nickwoelk

3

df.to_csv() ignores encoding when given a file object or any other filelike object. Docs IO CSV

#23854 opened Nov 22, 2018 by eode

12

BUG: Datetime subclasses are no longer datetime64 types Needs Tests good first issue

#21142 opened May 20, 2018 by fjetter

5

multi-dimensional-indexing deprecation warning has inconsistent stack level. Warnings

#31479 opened Jan 31, 2020 by tacaswell

1

CI: Enable spellcheck in docbuild CI Docs good first issue

#21354 opened Jun 7, 2018 by TomAugspurger

5

column names with leading underscores with df.itertuples cause AttributeError when accessed Docs

#23848 opened Nov 21, 2018 by gitstb

3

Local PostgreSQL faliures CI IO SQL Testing Unreliable Test good first issue

#20505 opened Mar 27, 2018 by TomAugspurger

10

Hexbin plot ignores matplotlib default colormap Visualization

#31871 opened Feb 11, 2020 by DavidMStraub

8

Pandas breaks warnings module when printing DataFrame Bug Regression Warnings

#31978 opened Feb 14, 2020 by fisheye36

4

merge_asof(left_index=True, right_on=...) overwrites left index with right index Bug Reshaping

#33463 opened Apr 10, 2020 by gtg944q

4

Series.dt.total_seconds() has incorrect docs for args Docs

#23170 opened Oct 15, 2018 by Dr-Irv

3

shift does not always preserve freqstr if series contains only one or two elements Needs Tests good first issue

#21275 opened May 31, 2018 by kdebrab

1

ewm NaN handling is wrong : simple example Bug Missing-data Window

#31178 opened Jan 21, 2020 by nhuth500

19

API/DOC: types covered by lib.infer_dtype API Design Docs Dtypes

#23554 opened Nov 7, 2018 by h-vetinari

3

DOC: DateOffset with month around end of February does not reproduce consecutive dates Docs Frequency

#22929 opened Oct 1, 2018 by pjarnhus

4

Move Wiki testing page to main docs? Docs good first issue

#20501 opened Mar 27, 2018 by TomAugspurger

3

Wrong char in Polish datetime month_name function

#31744 opened Feb 6, 2020 by CezaryPukownik

4

DOC: when accessed from inside a column-wise `df.apply(..., axis=1)`, row.index refers to df.columns, and row.name refers to df.index value

#30191 opened Dec 10, 2019 by smcinerney

6

Deprecate fill_value argument for df.add Deprecate Needs Discussion

#32608 opened Mar 11, 2020 by WillAyd

8

DOC: Fix all flake8 issues and warning in the documentation pages Clean Docs

#24173 opened Dec 9, 2018 by datapythonista

API: copy(deep=False) -> view? API Design

#33823 opened Apr 27, 2020 by jbrockmendel

2

.loc assignment with empty label list should not convert dtypes Dtypes Indexing

#29707 opened Nov 19, 2019 by jondo

3

ENH: Support downcasting of nullable dtypes in to_numeric Enhancement ExtensionArray NA - MaskedArrays Numeric

#33013 opened Mar 25, 2020 by jorisvandenbossche

1

poor melt example in documentation Docs Reshaping

#23844 opened Nov 21, 2018 by MLopez-Ibanez

7

data frame group by with extra categorical column aggregates datetime64 NaT column to float NaN Needs Tests good first issue

#20520 opened Mar 28, 2018 by mathiasdiez

3

Clarify behavior pd.Period and pd.PeriodIndex when using timestamp information Docs Period Timeseries

#24010 opened Nov 30, 2018 by trendelkampschroer

1

BUG: DataFrame/Series.loc improperly allows lookups of boolean labels/slices Needs Tests good first issue

#20432 opened Mar 21, 2018 by jschendel

2

Inconsistent behavior when groupby pandas Categorical variables Categorical Groupby Numeric

#31422 opened Jan 29, 2020 by DigitalPig

11

Creating DataFrame throws: data type "bytes512" not understood Needs Tests good first issue

#20734 opened Apr 18, 2018 by stephenmartindale

8

Add Timedelta Support to JSON Reader with orient="table" Enhancement IO JSON good first issue

#21140 opened May 20, 2018 by WillAyd

4

Pivot Table Margins aren't correctly showing NaN values despite dummy variables Bug Reshaping

#30351 opened Dec 19, 2019 by pshMsGsAZL2n07ohWBCAGX9cC

6

DataFrame.replace with dict does not work with Duplicate Column Labels Bug

#28866 opened Oct 9, 2019 by CrystalWindSnake

1

DOC/STYLE: Fix "F821 undefined name 'pd'" errors Docs Needs Discussion Style

#22900 opened Sep 29, 2018 by datapythonista

3

Raise ValueError When Attempting to Rank Object Dtypes Error Reporting Groupby good first issue

#19560 opened Feb 7, 2018 by WillAyd

14

Missing labels when applying style gives a KeyError Error Reporting

#32125 opened Feb 20, 2020 by simonvh

8

DataFrame with Int64 columns casts to float64 with .max()/.min() Bug NA - MaskedArrays

#32651 opened Mar 12, 2020 by qwhelan

2

issue when shifting with Timedelta in a groupby Docs Frequency Groupby Missing-data Resample good first issue

#20492 opened Mar 26, 2018 by randomgambit

11

File mode in `to_csv` is ignored, when passing a file object instead of a path Docs IO CSV good first issue

#19827 opened Feb 21, 2018 by colobas

20

`series.str.cat(series.str)` is concatenating only the largest string Bug Error Reporting Strings

#28277 opened Sep 4, 2019 by AK-ayush

8

df.plot legend entries missing markers when plotting multiple dataframes on same axes Visualization

#28451 opened Sep 14, 2019 by shahvi

9

ENH: pd.cut should be able to return a Series of IntervalDtype Enhancement Needs Discussion Reshaping cut

#31459 opened Jan 30, 2020 by Dr-Irv

3

Matplotlib's ConciseDateFormatter-like formatter in pandas.plotting._matplotlib.converter.py Visualization

#28485 opened Sep 17, 2019 by EBenkler

2

Are multiple callable/dict groupers allowed in groupby? API Design Docs Needs Discussion

#22278 opened Aug 11, 2018 by toobaz

1

[FR] Add keyword or option to print column names at bottom of output, not just top. Enhancement Output-Formatting

#32296 opened Feb 27, 2020 by mankoff

2

round method throws error if DataFrame includes Int64Dtype Algos Bug NA - MaskedArrays

#31478 opened Jan 31, 2020 by shouyu

4

Feature Request: context manager in which NaN equals NaN

#30834 opened Jan 9, 2020 by fujiaxiang

2

Assigned conversion via loc to Int64 fails under peculiar conditions

#31861 opened Feb 10, 2020 by shippy

1

convert numeric column to dedicated `pd.StringDtype()` Bug Dtypes ExtensionArray NA - MaskedArrays

#31204 opened Jan 22, 2020 by vadella

11

[BUG] Dataframe.rank() produces wrong results for float columns Algos Bug DataFrame

#32593 opened Mar 10, 2020 by karthikeyann

3

read_csv reference cites two different default delimiters Docs

#22448 opened Aug 21, 2018 by jazzlw

2

DOC: Implicit parallelism and how to disable it Docs Multithreading

#23139 opened Oct 13, 2018 by stuarteberg

13

DOC: the document for DataFrameGroupby.hist is identical to that of DataFrame.hist Docs

#22241 opened Aug 8, 2018 by javadnoorb

2

`test_maybe_promote_int_with_int` error on 32bit platform 32bit Unreliable Test

#31856 opened Feb 10, 2020 by toddrme2178

8

BUG: df.to_markdown() with empty frame incorrect output

#31771 opened Feb 7, 2020 by ThibTrip

4

Equivalent to the Excel fill handle Docs

#22993 opened Oct 4, 2018 by ghost

3

Series.sort_values using mergesort and descending is not stable Algos Bug

#28697 opened Sep 30, 2019 by has2k1

TST: Add ExtensionArray base tests for ops between pandas objects and EAs Docs ExtensionArray Numeric

#22974 opened Oct 3, 2018 by TomAugspurger

6

Modifying dataframe with float values using .iloc and boolean indexing raises ValueError Needs Tests good first issue

#20627 opened Apr 7, 2018 by karih

4

Series.reorder_levels docstring includes extra `axis` argument. Docs

#22627 opened Sep 7, 2018 by tschm

2

Bug: read_csv losing precision when reading Int64 data with N/A values Bug IO CSV NA - MaskedArrays

#32134 opened Feb 20, 2020 by p1lgr1m

1

bug: style.applymap + style.highlight_null() results in extra colons in the CSS Bug IO HTML

#28812 opened Oct 7, 2019 by zepaz

figsize property not accepted for pandas.plotting.autocorrelation_plot - visualization Visualization

#31650 opened Feb 4, 2020 by discdiver

2

Some [source] links in the documentation point to _decorators.py Docs

#23046 opened Oct 8, 2018 by vkk800

5

Add comment char parameter to to_csv method Enhancement IO CSV

#27637 opened Jul 29, 2019 by mthaak

6

WEB: Broken older versions link in the website Needs Discussion Web

#31061 opened Jan 16, 2020 by datapythonista

Pandas PDF documentation: Last page has missing reference question marks Docs

#23103 opened Oct 12, 2018 by 1kastner

4

Series[offsets] + Series[datetime64] fails Needs Tests good first issue

#19211 opened Jan 12, 2018 by jbrockmendel

4

setting a whole column changes column dtype from "category" to "object" Docs

#22361 opened Aug 15, 2018 by teto

4

Feature Request: Population Covariance Calculation with ddof parameter for DataFrame.cov() DataFrame Enhancement

#28823 opened Oct 7, 2019 by chrisyeh96

2

Expose Formatters via API and Improve Documentation Docs Needs Discussion Output-Formatting

#22773 opened Sep 19, 2018 by WillAyd

3

Feature Request: allow user defined categories in get_dummies Categorical Docs Enhancement

#22078 opened Jul 27, 2018 by abieler

4

New string data type aggregations (min, max, sum) work for DataFrames but not Series Bug ExtensionArray Strings

#31746 opened Feb 6, 2020 by tdpetrou

4

Add a function to draw sequential samples from a DataFrame Docs

#22445 opened Aug 21, 2018 by chrism2671

1

asv tests for DataFrame constructor Benchmark good first issue

#18840 opened Dec 19, 2017 by toobaz

2

DataFrame.select_dtypes include/exclude "int" not recognized. Dtypes

#29394 opened Nov 4, 2019 by simonjayhawkins

2

DOC: Series.mask() should point to Series.where() and vice versa Docs

#21825 opened Jul 9, 2018 by teoguso

1

groupby() drops categorical columns when aggregating with isna() Apply Categorical Groupby

#29837 opened Nov 25, 2019 by xujiboy

4

DataFrame built from ndarray does not preserve `.values.dtype` if there are no columns Constructors

#28704 opened Oct 1, 2019 by batterseapower

7