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

#32073 opened Feb 18, 2020 by Khris777

11

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

#32316 opened Feb 28, 2020 by mroeschke

5

read_csv: if parse_dates dont appear in use_cols, we get a trace IO CSV Needs Tests good first issue

#31251 opened Jan 23, 2020 by teto

4

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

#31620 opened Feb 3, 2020 by MarcoGorelli

3

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

#32301 opened Feb 27, 2020 by datapythonista

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

#30964 opened Jan 13, 2020 by datapythonista

2

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

#29671 opened Nov 17, 2019 by datapythonista

16

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

#30999 opened Jan 14, 2020 by MomIsBestFriend

25

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

#30232 opened Dec 12, 2019 by simonjayhawkins

12

HDF file compression not working IO HDF5 good first issue

#29310 opened Oct 31, 2019 by WuraolaOyewusi

9

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

#29214 opened Oct 25, 2019 by datapythonista

3

API: ExtensionArrays and conversion to "native" types (eg in tolist, to_dict, iteration, ..) Bug ExtensionArray good first issue

#29738 opened Nov 20, 2019 by jorisvandenbossche

6

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

#29547 opened Nov 11, 2019 by MomIsBestFriend

112

DOC: Fix SA04 errors in docstrings Docs good first issue

#28792 opened Oct 4, 2019 by ChiefMilesEdgeworth

9

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

#29102 opened Oct 19, 2019 by datapythonista

3

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

#28488 opened Sep 17, 2019 by TomAugspurger

5

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

#28926 opened Oct 11, 2019 by simonjayhawkins

20

Fix PR02 issues in docstrings Clean Docs good first issue

#27976 opened Aug 17, 2019 by datapythonista

8

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

2

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

#28547 opened Sep 20, 2019 by WillAyd

15

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

#31942 opened Feb 13, 2020 by HH-MWB

6

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

#31661 opened Feb 4, 2020 by srvanrell

6

DOC: Getting started tutorials feedback from EOSS meeting Docs

#32283 opened Feb 27, 2020 by mroeschke

4

DOC: clean up DataFrame.ewm Docs Window

#31647 opened Feb 4, 2020 by MarcoGorelli

7

DOC: Fix formatting errors in docstrings Docs good first issue

#27977 opened Aug 17, 2019 by datapythonista

5

Are the contributors in the whatsnew v1.0.1 note correct? Docs

#31717 opened Feb 5, 2020 by MarcoGorelli

4

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

#28546 opened Sep 20, 2019 by WillAyd

14

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

#32147 opened Feb 21, 2020 by xushengun

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

#26982 opened Jun 21, 2019 by datapythonista

4

MultiIndex.is_monotonic_increasing Docs

#32179 opened Feb 22, 2020 by xin-jin

9

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

#30896 opened Jan 10, 2020 by datapythonista

3

CI: Publishing development web and docs to GitHub actions fails CI Docs Web

#32303 opened Feb 27, 2020 by datapythonista

2

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

#26637 opened Jun 3, 2019 by shsnyder

5

DOC: Remove and disable wiki Docs Needs Discussion

#30410 opened Dec 22, 2019 by datapythonista

3

API: .equals for Extension Arrays API Design ExtensionArray good first issue

#27081 opened Jun 27, 2019 by jreback

8

pandas._testing.assert_produces_warning docstring unclear? Docs

#31453 opened Jan 30, 2020 by MarcoGorelli

Docs request: Specifying behavior of `dtype` parameter Docs

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

1

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

Rolling Apply Docs Broken Docs

#31762 opened Feb 6, 2020 by WillAyd

HDF5 API docs missing methods Docs IO HDF5

#31050 opened Jan 15, 2020 by kylekeppler

4

Clean Up Sphinx Warnings Docs

#31090 opened Jan 16, 2020 by WillAyd

4

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

#29689 opened Nov 18, 2019 by VasilijKolomiets

2

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

Make the documentation for pandas.Series.str.replace() clearer Docs

#31225 opened Jan 22, 2020 by drkarthi

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

#31073 opened Jan 16, 2020 by dumbledad

5

Improve fname documentation for to_parquet Docs IO Parquet

#29476 opened Nov 8, 2019 by larroy

5

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

#27085 opened Jun 27, 2019 by mroeschke

6

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

#27178 opened Jul 2, 2019 by timhoffm

3

DOC: Validate consistency of title capitalization CI Docs good first issue

#26941 opened Jun 19, 2019 by datapythonista

12

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

#31054 opened Jan 15, 2020 by hickmanw

1

Ensure isinstance checks use ABC classes where available Clean good first issue

#27353 opened Jul 12, 2019 by WillAyd

13

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

#29960 opened Dec 2, 2019 by SaturnFromTitan

json_normalize should raise when record_path doesn't point to an array Error Reporting IO JSON good first issue

#26284 opened May 5, 2019 by Marky0

7

Fix SS06 Issues in docstrings Docs

#29254 opened Oct 28, 2019 by profwacko

8

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

#26706 opened Jun 7, 2019 by jorisvandenbossche

29

Fix SS03 Issues in Docstrings Docs

#29315 opened Nov 1, 2019 by deepandas11

5

DOC: collect feedback on new sphinx documentation theme Docs

#28952 opened Oct 13, 2019 by jorisvandenbossche

19

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

#28937 opened Oct 12, 2019 by slokhorst

8

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

#28784 opened Oct 4, 2019 by josibake

1

Improve docs on what the axis= kwarg does in individual functions/methods Docs Needs Info

#29203 opened Oct 24, 2019 by dlukes

3

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

#29532 opened Nov 10, 2019 by simonjayhawkins

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

#28701 opened Oct 1, 2019 by josibake

1

sample from Series should never return empty series Docs

#28495 opened Sep 18, 2019 by roelhogervorst

5

DOC: diff() when using unsigned ints Docs

#28909 opened Oct 10, 2019 by jjlkant

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

#28580 opened Sep 23, 2019 by jorisvandenbossche

10

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

#25113 opened Feb 3, 2019 by kynan

3

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

#28702 opened Oct 1, 2019 by josibake

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

#28038 opened Aug 20, 2019 by datapythonista

19

DOC: do we want type hints in signature on API pages? Docs

#28585 opened Sep 23, 2019 by jorisvandenbossche

1

New pandas website Docs Needs Discussion

#27870 opened Aug 12, 2019 by datapythonista

5

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

#24817 opened Jan 17, 2019 by gm-spacagna

5

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

#25232 opened Feb 8, 2019 by MarckK

3

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

#24518 opened Dec 31, 2018 by mroeschke

6

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

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

#25324 opened Feb 14, 2019 by MarckK

4

Fixing docstrings that don't end with a period Docs

#27979 opened Aug 17, 2019 by Aya-S

3

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

#25337 opened Feb 15, 2019 by MarckK

2

Fix PR06 issues in docstrings Docs

#28724 opened Oct 1, 2019 by LauraCollard

3

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

#25376 opened Feb 19, 2019 by MarckK

8

DOC: Docstrings Formatting Error PR09 Docs

#28602 opened Sep 24, 2019 by HughKelley

8

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

#23992 opened Nov 29, 2018 by orena1

6

Add a "Best Practices" document Docs

#27483 opened Jul 19, 2019 by TomAugspurger

4

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

#28418 opened Sep 12, 2019 by jsal13

6

Make documentation runnable on binder Docs

#27514 opened Jul 22, 2019 by TomAugspurger

2

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

#25306 opened Feb 13, 2019 by MarckK

5

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

#25106 opened Feb 3, 2019 by kynan

4

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

#27308 opened Jul 9, 2019 by mpmoran

1

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

#27824 opened Aug 8, 2019 by TomAugspurger

3

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

#24351 opened Dec 19, 2018 by jreback

5

DOC/CI: Doc build is failing with sphinx 2.1 CI Docs

#26723 opened Jun 7, 2019 by datapythonista

3

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

#27343 opened Jul 11, 2019 by philippegr

4

Column headers out of alignment in 10 MInutes tutorial Docs

#26955 opened Jun 20, 2019 by vlbrown

3

DOC: Consolidate pages under /docs/getting_started Web

#32308 opened Feb 27, 2020 by mroeschke

3

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

#27328 opened Jul 10, 2019 by nugend

4

qcut fails with labels=True Docs Reshaping quantile

#26963 opened Jun 20, 2019 by RoyalTS

3

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

#24589 opened Jan 3, 2019 by timgeb

10

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

#26927 opened Jun 18, 2019 by smangham

7

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

#24209 opened Dec 10, 2018 by mroeschke

9

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

#26922 opened Jun 18, 2019 by dumbledad

2

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

#27319 opened Jul 10, 2019 by msznajder

6

DOC: Add glossary to the documentation Docs Needs Discussion

#27019 opened Jun 24, 2019 by datapythonista

2

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

#23164 opened Oct 15, 2018 by evarga

5

DOC: Validation of docsting validates Python type doc CI Docs

#27055 opened Jun 26, 2019 by datapythonista

2

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

#26790 opened Jun 11, 2019 by jorisvandenbossche

CI: build documentation for Windows CI Docs Needs Discussion Windows

#26574 opened May 30, 2019 by simonjayhawkins

5

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

#31835 opened Feb 9, 2020 by discdiver

2

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

#27078 opened Jun 27, 2019 by jreback

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

#26307 opened May 7, 2019 by Scowley4

3

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

#23988 opened Nov 29, 2018 by jbrockmendel

4

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

#31846 opened Feb 10, 2020 by RoyalTS

Series to_json Docstring Updates Docs IO JSON good first issue

#23584 opened Nov 8, 2018 by notnami

9

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

#31872 opened Feb 11, 2020 by tomasssalles

Wrong char in Polish datetime month_name function

#31744 opened Feb 6, 2020 by CezaryPukownik

4

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

#26611 opened Jun 1, 2019 by TomAugspurger

1

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

#25730 opened Mar 14, 2019 by dickreuter

8

DataFrame.replace changes dtype of columns not containing any value to be replaced. Dtypes

#30512 opened Dec 27, 2019 by ckoopmann

2

[FEATURE] Ability to pass regex module flags in DataFrame.replace while regex=True

#32233 opened Feb 25, 2020 by vishnu-dev

1

DOC: more specific str.split() explanation Docs

#25549 opened Mar 5, 2019 by RuMcClu

1

Inconsistent behavior when DataFrame with strings and None is created from lists or dictionary. Constructors

#32218 opened Feb 24, 2020 by ace-e4s

3

read_sql routes sql query as table name snowflake-sqlalchemy IO SQL

#31351 opened Jan 27, 2020 by norton120

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

#30281 opened Dec 15, 2019 by attack68

1

concat ignore_index option doesnt work

#31823 opened Feb 9, 2020 by Niroznak

1

set_index with multiindex silently converts None to NaN

#30866 opened Jan 9, 2020 by selik

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

#22836 opened Sep 26, 2018 by datapythonista

15

Cross tabulations for categorical data doesn't work as the way expected in the guide

#31410 opened Jan 29, 2020 by GYHHAHA

2

DataFrame.set_index() may not preserve dtype Dtypes Reshaping

#30517 opened Dec 27, 2019 by Dr-Irv

12

DataFrame.groupby doesn't preserve _metadata Groupby metadata

#29442 opened Nov 6, 2019 by pandichef

2

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

#24970 opened Jan 27, 2019 by dsaxton

4

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

#29707 opened Nov 19, 2019 by jondo

3

DOC: ongoing fixing of doctests Docs good first issue

#22459 opened Aug 22, 2018 by jorisvandenbossche

5

DataFrame shift along columns not respecting position when dtypes are mixed Algos Bug DataFrame

#29417 opened Nov 5, 2019 by pirsquared

7

Docstring Validator Fails when 'integer' is valid argument Docs

#25205 opened Feb 7, 2019 by WillAyd

1

ENH: Add engine keyword argument to groupby.apply to leverage Numba Apply Enhancement Groupby

#31845 opened Feb 10, 2020 by mroeschke

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

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

#24900 opened Jan 24, 2019 by trendelkampschroer

6

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

#31368 opened Jan 27, 2020 by tlaytongoogle

2

Extending the grouper `base` argument Docs Enhancement Groupby

#25226 opened Feb 8, 2019 by pj1989

1

Dataframe agg method passing as list Algos Docs Usage Question

#25454 opened Feb 26, 2019 by scottboston

3

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

#32134 opened Feb 20, 2020 by p1lgr1m

1

Pandas breaks warnings module when printing DataFrame Regression

#31978 opened Feb 14, 2020 by fisheye36

4

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

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

#24728 opened Jan 11, 2019 by chrisluedtke

3

DOC: test new sphinx 2 release CI Docs

#26058 opened Apr 12, 2019 by jorisvandenbossche

13

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

#25689 opened Mar 12, 2019 by NGJROMO

3

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

#29394 opened Nov 4, 2019 by simonjayhawkins

2

Assigning scalars to nullable dataframe columns reverts to default dtypes.

#31763 opened Feb 6, 2020 by davidwales

10

PERF: improve Integer/BooleanArray astype to numeric dtypes NA - MaskedArrays

#29839 opened Nov 25, 2019 by jorisvandenbossche

1

DOC: Missing PandasArray methods in API Docs

#24507 opened Dec 30, 2018 by datapythonista

4

Renaming DataFrame and Series is inconsistent when inplace=True API - Consistency

#30211 opened Dec 11, 2019 by Hvass-Labs

2

concat with same column names Reshaping

#30776 opened Jan 7, 2020 by krishnachouhan

3

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

DataFrame.GroupBy.apply has unexpected returns in some cases Apply Groupby

#31063 opened Jan 16, 2020 by xin-jin

1

DataFrame memory_usage inflates when unpickling a MultiIndex, deflates after copy IO Pickle MultiIndex Performance

#29542 opened Nov 11, 2019 by gggsanna

REGR: Timestamp subtraction raises TypeError, Non informative Regression

#31774 opened Feb 7, 2020 by sbrugman

4

Update plot docs when backend is set. Visualization

#28618 opened Sep 25, 2019 by TomAugspurger

2

pandas/conftest.py refactoring Testing

#31989 opened Feb 15, 2020 by SaturnFromTitan

10

pandas.DataFrame.reindex_like throws if called from a derived class instance Regression

#31925 opened Feb 12, 2020 by lguyot

7

Add method to handle mixed string and non-string types in object column.

#31498 opened Jan 31, 2020 by RicardoHS

4

Clean up null checking API - Consistency Missing-data

#32206 opened Feb 23, 2020 by dsaxton

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

#32296 opened Feb 27, 2020 by mankoff

2

DataFrame.loc multiple columns replace Indexing

#30439 opened Dec 24, 2019 by fansichao

1

Pandas is not able to append dataframe to an existing excel sheet.Although openpyxl can be used for it but openpyxl is also destroying pivot table and all other realted information.So we do not have another way available except openpyxl IO Excel Usage Question

#29990 opened Dec 3, 2019 by vishavgupta97

12

ewm NaN handling is wrong : simple example Window

#31178 opened Jan 21, 2020 by nhuth500

to_sql into MSSQL datetimeoffset column drops offset for DataFrame with one row IO SQL

#30884 opened Jan 10, 2020 by gordthompson

`DataFrame.resample()` breaks when rule parameter is of type `DateOffset` Bug

#31697 opened Feb 5, 2020 by thejonan

3

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

#25258 opened Feb 10, 2019 by justineuroHP

3

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

#27578 opened Jul 25, 2019 by kyleabeauchamp

3

combine_first: 'DataFrame' object has no attribute 'dtype' with duplicate columns Missing-data

#29135 opened Oct 21, 2019 by stippingerm

6

Series.append(DataFrame) should throw TypeError API Design Error Reporting Reshaping

#31413 opened Jan 29, 2020 by hvardhan20

2

Clarify how to cite pandas in scientific papers Docs

#24036 opened Dec 1, 2018 by JoKeyser

28

ExtensionArray.astype docstring Docs

#24773 opened Jan 14, 2019 by andrewgsavage

1

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

#25240 opened Feb 9, 2019 by fran6w

4

DOC: Update ecosystem.rst Docs

#24927 opened Jan 25, 2019 by TomAugspurger

2

DataFrame.set_index when setting a duplicate name now raises API Design MultiIndex

#30965 opened Jan 13, 2020 by TomAugspurger

Inconsistent .loc slicing behaviour with NaNs in MultiIndex dataframe Indexing MultiIndex

#29751 opened Nov 20, 2019 by pepicello

REF: move 'describe' functions to new file Refactor

#31154 opened Jan 20, 2020 by david-cortes

Dataframe.plot error (on version 0.25.1) Visualization

#28593 opened Sep 24, 2019 by ganhw1970

poor melt example in documentation Docs Reshaping

#23844 opened Nov 21, 2018 by MLopez-Ibanez

7

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

#25239 opened Feb 9, 2019 by nmusolino

3

Align should consider the dtype when creating new columns API Design Dtypes Numeric Reshaping

#31874 opened Feb 11, 2020 by TomAugspurger

Dropna Subnet changes timestamp format in to_csv() Bug Output-Formatting Timeseries

#29711 opened Nov 19, 2019 by gleblanc1783

4

Incorrect boolean bitwise conversion when dtype=object Warnings

#31035 opened Jan 15, 2020 by eric-downes

9

DataFrame.query raises ValueError when comparing columns with nullable dtypes Bug ExtensionArray expressions

#31913 opened Feb 12, 2020 by daviewales

8

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

#24673 opened Jan 8, 2019 by jorisvandenbossche

1

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

#21520 opened Jun 18, 2018 by datapythonista

5

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

#31061 opened Jan 16, 2020 by datapythonista

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

#25187 opened Feb 6, 2019 by miguelfg

2

PERF: DataFrame.mean() is slow with datetime columns Performance

#31075 opened Jan 16, 2020 by richierocks

4

Hexbin plot ignores matplotlib default colormap Visualization

#31871 opened Feb 11, 2020 by DavidMStraub

8

hash_pandas_object hash differs for NaN Bug hashing

#28363 opened Sep 9, 2019 by naupa

3

Rows order when using slice(None) on MultiIndex Dataframe.loc Indexing

#31330 opened Jan 26, 2020 by nrebena

Missing labels when applying style gives a KeyError Error Reporting

#32125 opened Feb 20, 2020 by simonvh

8

API: Named aggregations for groupby.transform()

#32318 opened Feb 28, 2020 by davidwales

Pandas.DataFrame.to_sql() Default Insert Behavior Assumes Table Creation IO SQL

#29138 opened Oct 21, 2019 by pigfat

4

DOC: Redirect old whatsnew links Docs

#23695 opened Nov 14, 2018 by TomAugspurger

7

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

#21675 opened Jun 29, 2018 by jzwinck

8

json_normalize in 1.0.0 with meta path specified - expects iterable IO JSON Regression

#31507 opened Jan 31, 2020 by tturocy

10

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

#31478 opened Jan 31, 2020 by shouyu

5

changing order of keys? Algos DataFrame Docs

#24730 opened Jan 11, 2019 by epierson9

4

Series.str.rsplit not working with regex patterns (v 0.24.2 and 0.25.2) Strings

#29633 opened Nov 15, 2019 by jamespreed

3

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

#20647 opened Apr 10, 2018 by jorisvandenbossche

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

local test failure - pandas/tests/io/test_parquet.py::TestBasic::test_compression[fastparquet-snappy] IO Parquet Windows

#32327 opened Feb 28, 2020 by simonjayhawkins

3

pandas.Dataframe.interpolate() does not extrapolate even if it is asked to, depending on interpolation method

#31949 opened Feb 13, 2020 by typorian

Series.replace not working on slices of heterogenoues types replace

#29813 opened Nov 23, 2019 by bluenote10

3

BUG: wrong errors when indexing with list that includes pd.NA Bug Indexing NA - MaskedArrays

#31948 opened Feb 13, 2020 by jorisvandenbossche

1

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

#28866 opened Oct 9, 2019 by CrystalWindSnake

1

DOC: Template Timestamp & NaT docstrings Docs Timeseries

#23458 opened Nov 2, 2018 by mroeschke

2

numexpr inconsistent result expressions

#30845 opened Jan 9, 2020 by misantroop

4

pd.concat inconsistent coercion of None depending of value in rows Reshaping

#29023 opened Oct 16, 2019 by ConorSheehan1

Cannot `remove_unused_categories` for CategoricalIndex in a MultiIndex Categorical MultiIndex

#30846 opened Jan 9, 2020 by fujiisoup

6

BUG: pd.DataFrame.select_dtypes() method defaults None to float64 if arg is list-like Dtypes

#28943 opened Oct 12, 2019 by jrcoutinho

3

DOC: Reorganization of the documentation Docs Needs Discussion

#24499 opened Dec 30, 2018 by datapythonista

14

read_csv s3 file parameter memory_map default is True? IO CSV

#30555 opened Dec 30, 2019 by autocyz

4

build_table_schema has hardcoded Pandas version (0.20.0) IO JSON

#28455 opened Sep 16, 2019 by slazicoicr

5

Sparse DataFrame with all-zeros column returns NA for fancy index Sparse

#29563 opened Nov 12, 2019 by memeplex

1

DataFrame[list[Series[datetime64ns, tz]]] drops timezone information Bug Constructors DataFrame Timezones

#28552 opened Sep 20, 2019 by Koojav

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

Memory leak in Dataframe.memory_usage DataFrame

#29411 opened Nov 5, 2019 by hyfjjjj

2

Inconsistency/bug when selecting from a data-frame using an unsorted DatetimeIndex Indexing

#30736 opened Jan 6, 2020 by erezinman

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

#21564 opened Jun 20, 2018 by TomAugspurger

13

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

11

Having problem with 'pandas.DataFrame.loc' for multi type and size dataframes.

#32372 opened Feb 29, 2020 by navidzol

1

Series/DataFrame.rename(<mapper>, level=None) doesn't work in non-ambiguous case API Design

#30848 opened Jan 9, 2020 by simonjayhawkins

4

Misleading error message when Series.dt.tz_convert overflows Error Reporting Timeseries

#28611 opened Sep 25, 2019 by torfsen

BUG: Index.isin inconsistency with missing value

#30677 opened Jan 4, 2020 by proost

1

CI: Enable spellcheck in docbuild CI Docs good first issue

#21354 opened Jun 7, 2018 by TomAugspurger

5

Resampler sometimes adds extra bin with NaN Resample

#30353 opened Dec 19, 2019 by vapoto

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

#22929 opened Oct 1, 2018 by pjarnhus

4

PerformanceWarning: misleading warning for all columns Error Reporting IO HDF5 Strings

#28460 opened Sep 16, 2019 by jankislinger

1

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

#20501 opened Mar 27, 2018 by TomAugspurger

3

use DataFrame.style and can't get [cellstyle] as expected Output-Formatting

#27729 opened Aug 3, 2019 by whatagain

1

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

#28823 opened Oct 7, 2019 by chrisyeh96

2

DataFrame.at indexing with date string promotes column type, while indexing with datetime casts value Bug Dtypes Indexing Timeseries

#29709 opened Nov 19, 2019 by Jokab

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

#30347 opened Dec 19, 2019 by simonjayhawkins

3

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

#20505 opened Mar 27, 2018 by TomAugspurger

10

Inconsistent behavior when groupby pandas Categorical variables Categorical Groupby Numeric

#31422 opened Jan 29, 2020 by DigitalPig

11

Strange implicit string to datetime coercion during pd.Series comparisons Bug Docs Error Reporting Timeseries

#23234 opened Oct 19, 2018 by AbdouSeck

4

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

#23046 opened Oct 8, 2018 by vkk800

5

DEPS: Minimum numpy version for pandas 1.0 Clean Dependencies

#29512 opened Nov 9, 2019 by datapythonista

2

PERF: avoid casting to float in IntegerArray reducing ops ExtensionArray Numeric Performance

#30436 opened Dec 23, 2019 by jorisvandenbossche

REGR: Series repr of object Index with bools and NaN is wrong Output-Formatting Regression

#32146 opened Feb 21, 2020 by disimone

6

Resampling on index and column after groupby give different results Groupby Resample

#30057 opened Dec 4, 2019 by danguetta

BUG: Calling cartesian_product with large combinatorial space overflows int64 gives misleading errors

#31355 opened Jan 27, 2020 by mobiusklein

series.rename doesn't return 'None' when inplace=True API Design Bug

#28920 opened Oct 11, 2019 by giuliobeseghi

13

Add `shift` to `dt` accessor Enhancement

#31705 opened Feb 5, 2020 by giuliobeseghi

2

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

#29837 opened Nov 25, 2019 by xujiboy

4

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

#23554 opened Nov 7, 2018 by h-vetinari

3

Pandas dataframe sub-setting returns NaN's when whole column matches fill value DataFrame Sparse

#29321 opened Nov 1, 2019 by mjobin

7

PERF: Index._shallow_copy doesn't copy ._engine Index Performance

#28584 opened Sep 23, 2019 by topper-123

3

Pandas wrongly read Scipy sparse matrix Bug Sparse

#29814 opened Nov 23, 2019 by m7142yosuke

4

merge_ordered() should accept left_index and right_index args Enhancement Reshaping

#27760 opened Aug 5, 2019 by austin3dickey

qcut not respecting precision values cut

#32127 opened Feb 20, 2020 by m-dz

1

tz_localize creates freq inconsistency on time offset change Frequency Timezones

#30511 opened Dec 27, 2019 by giuliobeseghi

2

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

#24173 opened Dec 9, 2018 by datapythonista

ADMIN: display issue metrics Admin

#30576 opened Dec 31, 2019 by jreback

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

#28277 opened Sep 4, 2019 by AK-ayush

8

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

#23447 opened Nov 1, 2018 by nickwoelk

3

Unexpected behaviour of `Series.rolling.corr` when using a `Timedelta` based window.

#31286 opened Jan 24, 2020 by trendelkampschroer

columns sometimes not added to empty dataframe Bug Constructors Indexing

#28871 opened Oct 9, 2019 by innominate227

4

Extension dtypes are modified when performing groupby aggregate with agg dict Groupby NA - MaskedArrays Regression

#32194 opened Feb 23, 2020 by griffindore

1

Verbose parameter in pandas.Series.apply Needs Info

#31245 opened Jan 23, 2020 by MastafaF

4

WEB: Deployment of the new website in production Needs Discussion Web

#28528 opened Sep 19, 2019 by datapythonista

16

`MultiIndex.get_loc` throws `KeyError` under specific circumstances Indexing MultiIndex

#30053 opened Dec 4, 2019 by p-himik

DataFrame arithmetic functions with multiindex, NaN index values, and fill_value set returns an invalid result with non-unique index.

#30857 opened Jan 9, 2020 by twheys

1

Why does DatetimeIndex have _timezone in addition to _tz? Docs Timeseries

#23624 opened Nov 11, 2018 by jbrockmendel

2

0.25.1 pandas.core.frame.DataFrame.eval() erroring-out on Python 3.7 (but not on Python 3.6) expressions

#29819 opened Nov 23, 2019 by JohnMount

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

#23848 opened Nov 21, 2018 by gitstb

3

Using to_json/read_json with orient='table' on a DataFrame with a single level MultiIndex does not work IO JSON

#29928 opened Nov 29, 2019 by larrymouse

Flakey Test in CI - Unclosed File Handle CI Unreliable Test

#29514 opened Nov 9, 2019 by alimcmaster1

6

DataFrame.drop with empty DatetimeIndex behaves differently than passing empty Index Bug DataFrame

#27994 opened Aug 18, 2019 by katsuya-horiuchi

5

setting precision for display sometimes shows wrong output Output-Formatting

#30122 opened Dec 7, 2019 by k1monfared

1

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

#30351 opened Dec 19, 2019 by pshMsGsAZL2n07ohWBCAGX9cC

6

Deprecate groupby() squeeze option Deprecate Reshaping

#32380 opened Feb 29, 2020 by dechamps

4

Not supported for DataFrames Exception triggered by a simple inspect.getmembers() call on a DataFrame

#31474 opened Jan 31, 2020 by RichardBruskiewich

5

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

sort_index on a multiindexed DataFrame with sparse columns fills with NaNs

#29735 opened Nov 20, 2019 by MisterKeefe

2

Thousands separator for to_csv IO CSV

#30045 opened Dec 4, 2019 by ghisvail

2

DataFrame.corr(method="kendall") calculation is slow Performance

#28329 opened Sep 6, 2019 by dsaxton

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

#21140 opened May 20, 2018 by WillAyd

4

DataFrameGroupBy object cannot be passed to dict ctor Groupby Needs Discussion

#30621 opened Jan 2, 2020 by mslapek

6

Refactor inherit_names to work by inheritance Typing

#32100 opened Feb 19, 2020 by SaturnFromTitan

When applied as style in to_excel(), 'vertical-align: middle' works for OpenPyXL, but not for XlsxWriter engine IO Excel

#30107 opened Dec 6, 2019 by HansHirse

BUG: pd.Dataframe.from_dict when first value is a list Constructors Reshaping

#29213 opened Oct 24, 2019 by MaddeeRubenson

3

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

#28704 opened Oct 1, 2019 by batterseapower

7

Dataframe assignment breaks Timestamp series (possibly due to rounding) Indexing

#29482 opened Nov 8, 2019 by coells

1

_normalize_keyword_aggregation` named agg helper function should be made public API Design Groupby

#28472 opened Sep 16, 2019 by arpit1997

1

Handle ExtensionArrays in cut Algos ExtensionArray cut

#31389 opened Jan 28, 2020 by TomAugspurger

3

MultiIndex-Columns Integer and String: Column level 1 not accessable after a using append multiple times

#29699 opened Nov 18, 2019 by Alrik-star

[TST] Revise test_astype_str_map Testing

#28454 opened Sep 16, 2019 by makbigc

1

Equivalent to the Excel fill handle Docs

#22993 opened Oct 4, 2018 by ghost

3

BUG: incorrect fills when reindexing multi-indexed DataFrames Bug MultiIndex

#29896 opened Nov 27, 2019 by ChrisRobo

Error initialising DataFrame with array of shape (1, 1) and extensiondtype Constructors

#30428 opened Dec 23, 2019 by MarcoGorelli

np.nan comparison to pd.NA Equality Semantics differ elementwise in IntervalArray Missing-data NA - MaskedArrays

#31882 opened Feb 11, 2020 by WillAyd

1

DataFrame.from_dict sets DataFrame values to NaN if original dict key tuples contain None Missing-data

#28390 opened Sep 11, 2019 by dmparker0

3

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

#23170 opened Oct 15, 2018 by Dr-Irv

3