pandas-dev/pandas issues and pull requests

#20110 - CLN: remove fastpath & verify_integrity from constructors

Issue - State: open - Opened by jreback over 7 years ago - 7 comments
Labels: Deprecate, Clean, Constructors

#20060 - ENH: Add Support for GroupBy Numeric Operations

Issue - State: closed - Opened by WillAyd over 7 years ago - 7 comments
Labels: Enhancement, Groupby, Numeric Operations

#19958 - Concat slow when frames indexed separately

Issue - State: closed - Opened by jeremywhelchel over 7 years ago - 11 comments
Labels: Performance, Reshaping

#19931 - Pandas complains about an already opened file, even when the file has been closed.

Issue - State: closed - Opened by spott over 7 years ago - 7 comments
Labels: IO HDF5, Needs Info

#19890 - BUG: Retain timezone dtype with cut and qcut

Pull Request - State: closed - Opened by mroeschke over 7 years ago - 4 comments
Labels: Bug, Reshaping, Timezones

#19791 - slow execution with internal error visible upon interruption for indexing with dataframe: TypeError: cannot convert bool to an floatblock

Issue - State: closed - Opened by denfromufa over 7 years ago - 6 comments
Labels: good first issue, Needs Tests

#19778 - CLN: Remove `counts` Argument from Cython GroupBy Aggregations

Issue - State: closed - Opened by WillAyd over 7 years ago - 6 comments
Labels: Groupby, Internals, Clean, Closing Candidate

#19750 - DOC: to quote or not to quote

Issue - State: closed - Opened by jorisvandenbossche over 7 years ago - 5 comments
Labels: Docs, Closing Candidate

#19741 - Consider adding ExtensionDtype.is_dtype_equal

Issue - State: closed - Opened by TomAugspurger over 7 years ago - 2 comments
Labels: Enhancement, Dtype Conversions, Internals, ExtensionArray, Closing Candidate

#19671 - auto convert from string to datetime64 in iterrows.

Issue - State: closed - Opened by xiaoluffy over 7 years ago - 7 comments
Labels: Bug, Reshaping, Dtype Conversions, Strings

#19654 - Enhancement: Exclude "callable" classes (and subclasses) from callable() calls

Issue - State: closed - Opened by NowanIlfideme over 7 years ago - 4 comments
Labels: Enhancement, Indexing

#19501 - Suggestion: Pop row or multiple rows from a DataFrame

Issue - State: closed - Opened by jaradc over 7 years ago - 8 comments
Labels: Docs

#19457 - pd.read_sql_query with chunksize: pandasSQL_builder should only be called when first chunk is requested

Issue - State: open - Opened by leezu over 7 years ago - 10 comments
Labels: Bug, IO SQL

#19449 - infer_dtype not reporting mixed with decimal/floating

Issue - State: closed - Opened by jmkuhn over 7 years ago - 4 comments
Labels: Dtype Conversions

#19432 - MultiIndex.from_product() casts float to int when corresponding int is also present

Issue - State: open - Opened by toobaz over 7 years ago - 13 comments
Labels: Dtype Conversions, MultiIndex

#19302 - DOC: SeriesGroupby/DataFrameGroupBy is missing class documentaion from doc index

Issue - State: open - Opened by allComputableThings over 7 years ago - 6 comments
Labels: Docs, Groupby

#19299 - DataFrame.setitem performance regression with object dtype

Issue - State: closed - Opened by TomAugspurger over 7 years ago - 2 comments
Labels: Indexing, good first issue, Benchmark

#19227 - read_csv issues with dict for na_values

Issue - State: closed - Opened by neilser over 7 years ago - 3 comments
Labels: Bug, IO CSV

#19159 - Document our pytest fixtures

Issue - State: closed - Opened by TomAugspurger over 7 years ago - 20 comments
Labels: Testing, Docs, good first issue

#19156 - API/ENH: easier configurable NA values for parsing

Issue - State: closed - Opened by chris-b1 over 7 years ago - 1 comment
Labels: Enhancement, IO CSV

#19129 - Raise ValueError for read_json and orient='table' With Numeric Column Names

Issue - State: open - Opened by WillAyd over 7 years ago - 20 comments
Labels: Enhancement, Error Reporting, IO JSON, good first issue

#19102 - ENH: A cheap copy on a dataframe

Issue - State: closed - Opened by has2k1 over 7 years ago - 6 comments
Labels: Enhancement, Needs Discussion, Copy / view semantics

#19088 - DatetimeIndex comparison with ndim>1 incorrect or raises

Issue - State: closed - Opened by jbrockmendel over 7 years ago - 10 comments
Labels: Numeric Operations, good first issue, Needs Tests

#19082 - BUG: Creating Index name using `names` names argument, doesn't set index name

Issue - State: open - Opened by jsnowacki over 7 years ago - 8 comments
Labels: Docs, MultiIndex, good first issue

#19026 - PERF/BENCHMARK: comprehensive cat-groupby benchmarks

Issue - State: closed - Opened by jreback almost 8 years ago - 4 comments
Labels: Groupby, Categorical, Benchmark

#18976 - CLN: Refactor nanops' empty array handling

Issue - State: open - Opened by TomAugspurger almost 8 years ago
Labels: Refactor, Missing-data, Reduction Operations

#18930 - Some interesting behavior from .groupby().apply( .to_records() )

Issue - State: closed - Opened by alexlenail almost 8 years ago - 11 comments
Labels: Bug, Groupby, Apply

#18869 - Groupby doesn't call aggregation on empty groups

Issue - State: closed - Opened by TomAugspurger almost 8 years ago - 6 comments
Labels: Bug, Groupby, Categorical, good first issue, Needs Tests

#18857 - DOC: improve docs for broadcasting behavior

Issue - State: open - Opened by jakevdp almost 8 years ago - 16 comments
Labels: Docs, Numeric Operations, good first issue

#18854 - Offsets Roundup

Issue - State: closed - Opened by jbrockmendel almost 8 years ago - 2 comments
Labels: Frequency, Timezones, Period, Master Tracker

#18843 - Series not honoring class repr or str

Issue - State: open - Opened by achapkowski almost 8 years ago - 12 comments
Labels: Bug, Output-Formatting

#18776 - Merge with how='inner' does not always preserve the order of the left keys

Issue - State: closed - Opened by haimivan almost 8 years ago - 8 comments
Labels: Bug, Reshaping

#18752 - No SettingWithCopyWarning for chained indexing when .loc or .iloc is first indexer

Issue - State: closed - Opened by tdpetrou almost 8 years ago
Labels: Bug, Indexing, Warnings, Copy / view semantics

#18696 - Groupby with function returning a tuple fails if index has a name

Issue - State: closed - Opened by achabotl almost 8 years ago - 9 comments
Labels: Docs, Groupby, good first issue

#18692 - CSV files with header break with delim_whitespace and skiprows using the C-engine

Issue - State: closed - Opened by rgieseke almost 8 years ago - 8 comments
Labels: Bug, IO CSV

#18658 - Feature Request/Idea Treat a DataFrame full of Series as a Multindex Dataframe

Issue - State: closed - Opened by AKuederle almost 8 years ago - 5 comments
Labels: Enhancement, Needs Discussion, Apply, Nested Data

#18631 - .loc with (scalar, slice(None)) on MultiIndex does not drop first level

Issue - State: open - Opened by toobaz almost 8 years ago - 3 comments
Labels: Bug, Indexing, MultiIndex

#18470 - [feature] Add a from_dict method for MultiIndex construction

Issue - State: closed - Opened by mefergus almost 8 years ago - 3 comments
Labels: Enhancement, MultiIndex

#18342 - Numbers --> strings conversion - unexpected results (read_html)

Issue - State: closed - Opened by Vladimirzelenkovskii almost 8 years ago - 2 comments
Labels: Enhancement, IO HTML

#18221 - df.query() does not support column name 'class'

Issue - State: closed - Opened by michaelaye almost 8 years ago - 4 comments
Labels: Docs, Error Reporting

#18220 - DOC: DataFrame.groupy.agg with a list of tuples

Issue - State: closed - Opened by tdpetrou almost 8 years ago - 6 comments
Labels: Docs, Groupby, good first issue

#18176 - DataFrame replace slow on DataFrames containing strings when using use_inf_as_null option

Issue - State: closed - Opened by spillz almost 8 years ago - 3 comments
Labels: Missing-data, Benchmark, replace

#18063 - search path of pandas read_csv function

Issue - State: closed - Opened by ardeal almost 8 years ago - 5 comments
Labels: Usage Question

#18044 - rolling skew and rolling kurt has wrong answer under all eq values

Issue - State: closed - Opened by zartbot almost 8 years ago - 9 comments
Labels: Bug, Numeric Operations

#18009 - DataFrame.interpolate() failes with complex dtype

Issue - State: closed - Opened by jennirinker almost 8 years ago - 3 comments
Labels: Bug, Missing-data, Complex

#18007 - CI: turn on debug builds on windows

Issue - State: closed - Opened by jreback almost 8 years ago - 3 comments
Labels: CI, Windows

#17931 - MultiIndex with NaNs reported as non sorted

Issue - State: open - Opened by louridas almost 8 years ago - 2 comments
Labels: Bug, Missing-data, MultiIndex

#17928 - API: should Series.get be strictly label based or allow positional?

Issue - State: open - Opened by jorisvandenbossche almost 8 years ago - 2 comments
Labels: Indexing, API Design, Needs Discussion

#17886 - stack() casts to float when called on levels not requiring it

Issue - State: closed - Opened by toobaz almost 8 years ago - 7 comments
Labels: Bug, Reshaping, Dtype Conversions

#17860 - ENH? to_datetime: ability to infer unit for numeric values

Issue - State: closed - Opened by cailiang9 almost 8 years ago - 8 comments
Labels: Enhancement, Timeseries, Needs Discussion

#17834 - Please add force_suffixes to pandas.merge()

Issue - State: open - Opened by sorenwacker almost 8 years ago - 23 comments
Labels: Enhancement, Reshaping

#17791 - ENH: Add DatetimeIndexResampler.nlargest

Issue - State: open - Opened by edschofield almost 8 years ago - 10 comments
Labels: Enhancement, Groupby, Resample

#17790 - Use Turbodbc/Arrow for read_sql_table

Issue - State: open - Opened by mrocklin almost 8 years ago - 7 comments
Labels: Enhancement, IO SQL

#17754 - DatetimeIndex selection with .loc is orders of magnitude slower than [] on ordered frame

Issue - State: closed - Opened by tdpetrou about 8 years ago - 8 comments
Labels: Indexing, Performance, Error Reporting

#17725 - DataFrame.plot() with mplstyle file option axes.grid.axis: y behaves like axes.grid.axis: both

Issue - State: open - Opened by luisdelatorre012 about 8 years ago - 4 comments
Labels: Bug, Visualization

#17719 - Accept dictionaries for mapping categories in Categorical Data

Issue - State: closed - Opened by robertour about 8 years ago - 6 comments
Labels: Enhancement, Categorical, Needs Discussion

#17718 - Groupy chunks are garbage-collected even if still referenced

Issue - State: closed - Opened by toobaz about 8 years ago - 2 comments
Labels: good first issue, Needs Tests

#17676 - Simultaneously melt multiple columns

Issue - State: open - Opened by tdpetrou about 8 years ago - 3 comments
Labels: Enhancement, Reshaping

#17612 - API: column ordering on `get_dummies` #12010

Issue - State: closed - Opened by Giftlin about 8 years ago - 9 comments
Labels: Usage Question, API Design, Categorical

#17553 - Improve plotting Timedelta on y-axis (Timedelta string representation)

Issue - State: open - Opened by s-celles about 8 years ago - 7 comments
Labels: Enhancement, Visualization

#17542 - Last DataFrame column missing when using get_dummies successively

Issue - State: closed - Opened by aoussou about 8 years ago - 2 comments

#17505 - DOC: nice links / examples for setting with copy & aggregation

Issue - State: closed - Opened by jreback about 8 years ago - 2 comments
Labels: Docs, good first issue

#17479 - DatetimeIndex plot converter performance

Issue - State: closed - Opened by jondoesntgit about 8 years ago - 5 comments
Labels: Visualization, Performance

#17445 - Inconsistent results for groupby on multiple columns with NaN value

Issue - State: closed - Opened by linar-jether about 8 years ago - 2 comments
Labels: Docs, Groupby, Missing-data

#17373 - Method series.hist doesn't have a rot parameter

Issue - State: closed - Opened by prcastro about 8 years ago - 3 comments
Labels: Enhancement, Visualization

#17326 - DOC: Strangest behavoir of groubpy aggregation ever, most likely a bug

Issue - State: open - Opened by FlorianWilhelm about 8 years ago - 17 comments
Labels: Docs, Groupby, Apply

#17282 - qcut: Option to return -inf/inf as lower/upper bound

Issue - State: closed - Opened by prcastro about 8 years ago - 3 comments
Labels: Enhancement, cut

#17232 - Better display of negative Timedelta

Issue - State: open - Opened by scls19fr about 8 years ago - 4 comments
Labels: Enhancement, Output-Formatting, Timedelta

#17212 - [DOC] Clarify DataFrame.transform vs .applymap

Issue - State: closed - Opened by cancan101 about 8 years ago - 2 comments
Labels: Docs, Apply

#17202 - BUG: groupby(.., as_index=False) with a TimeGrouper

Issue - State: closed - Opened by randomgambit about 8 years ago - 9 comments
Labels: Bug, Groupby, Resample, good first issue, Needs Tests

#17107 - `sheet_name` argument from `read_excel` is always giving the first sheet

Issue - State: closed - Opened by rubennj about 8 years ago - 9 comments
Labels: IO Excel

#17098 - Why does autocorrelation_plot() generate plots where auto-correlation proportionally decrease with lag?

Issue - State: open - Opened by dokteurwho about 8 years ago - 4 comments
Labels: Bug, Visualization, Needs Discussion

#17037 - BUG: `to_timedelta` overflows without raising in some very particular cases

Issue - State: closed - Opened by cchwala about 8 years ago - 8 comments
Labels: Bug, Timedelta

#17019 - BUG: read_csv fails some http servers if port number is specified

Issue - State: closed - Opened by skynss about 8 years ago - 6 comments
Labels: Enhancement, IO CSV, IO Network

#17010 - COMPAT: safe argsort in Index/Series

Issue - State: open - Opened by jreback about 8 years ago - 1 comment
Labels: Bug, Algos, Closing Candidate

#16943 - MultiIndex row indexing with .loc fail with tuple but work with list of indices

Issue - State: closed - Opened by mansenfranzen about 8 years ago - 15 comments
Labels: Indexing, MultiIndex

#16872 - ENH: DataFrame.insert should allow for negative loc parameter

Issue - State: closed - Opened by gandhis1 about 8 years ago - 2 comments
Labels: Enhancement

#16827 - Scatter plot with colour_by and size_by variables

Issue - State: closed - Opened by nipunbatra about 8 years ago - 11 comments
Labels: Docs, Visualization, good first issue

#16749 - API: provide a to_enum method for Categorical dtypes?

Issue - State: closed - Opened by chris-b1 over 8 years ago - 2 comments
Labels: Enhancement, Categorical, Needs Discussion

#16737 - Unexpected results creating an empty Series

Issue - State: closed - Opened by AllenDowney over 8 years ago - 9 comments
Labels: Bug, Indexing, Constructors

#16735 - I am getting error installing Pandas on AWS Lightsail with Amazon Linux image.

Issue - State: closed - Opened by prabhatM over 8 years ago - 3 comments

#16714 - inplace kwarg must be of bool type, but other boolean kwargs don't have this restriction

Issue - State: closed - Opened by colinmorris over 8 years ago - 14 comments
Labels: Enhancement, Error Reporting, good first issue, API - Consistency, inplace

#16578 - DOC: pivot function

Issue - State: closed - Opened by jesrael over 8 years ago - 8 comments
Labels: Docs, Reshaping, good first issue

#16550 - False positive SettingWithCopyWarning when just taking subset of columns

Issue - State: closed - Opened by jorisvandenbossche over 8 years ago - 7 comments
Labels: Bug, Indexing, Error Reporting, Copy / view semantics

#16544 - Importing pandas module breaks expected behavior of Thread[ed] script

Issue - State: closed - Opened by christian-eriksson over 8 years ago - 8 comments
Labels: good first issue, Needs Tests

#16529 - API/DEPR: Deprecate inplace parameter

Issue - State: open - Opened by gfyoung over 8 years ago - 60 comments
Labels: API Design, Deprecate, Needs Discussion, Closing Candidate, inplace

#16485 - Meaning of color argument in DataFrame.plot.scatter()

Issue - State: closed - Opened by Dr-Irv over 8 years ago - 7 comments
Labels: Enhancement, Visualization

#16440 - More memory efficient hash tables

Issue - State: closed - Opened by rohanp over 8 years ago - 10 comments
Labels: Enhancement, Performance

#16399 - Categorical handles imaginary values incorrectly

Issue - State: closed - Opened by TomAugspurger over 8 years ago - 3 comments
Labels: Categorical, Complex, Needs Tests

#16367 - pd.crosstab, categorical data and missing instances

Issue - State: open - Opened by peisenha over 8 years ago - 16 comments
Labels: Docs, Reshaping, Categorical, good first issue

#16328 - BUG: Bins are unexpected for qcut when the edges are duplicated

Issue - State: open - Opened by artturib over 8 years ago - 9 comments
Labels: Bug, cut

#16310 - Documentation on Performance considerations

Issue - State: closed - Opened by Dr-Irv over 8 years ago - 4 comments
Labels: Docs, Performance, good first issue

#16304 - Index order of joined frame does not respect the order of left frame when right contains duplicates

Issue - State: open - Opened by Midnighter over 8 years ago - 3 comments
Labels: Bug, Reshaping, Closing Candidate

#16300 - Wrong error message in HDFStore.append when appending dataframe with None item in previously string-only column

Issue - State: closed - Opened by toobaz over 8 years ago - 9 comments
Labels: Enhancement, Error Reporting, IO HDF5, good first issue

#16283 - df.eval does not see globals

Issue - State: closed - Opened by maxnoe over 8 years ago - 1 comment
Labels: Docs, expressions

#16161 - Excel styles should default to using number format from display.precision option

Issue - State: closed - Opened by jnothman over 8 years ago - 2 comments
Labels: Enhancement, Output-Formatting, IO Excel

#16098 - ERR: DataFrame can get into unprintable state

Issue - State: closed - Opened by chris-b1 over 8 years ago - 8 comments
Labels: Bug, Output-Formatting, Error Reporting

#16097 - no warning with invalid pd.set_option('display.max_colwidth')

Issue - State: open - Opened by jkornblum over 8 years ago - 7 comments
Labels: Enhancement, Output-Formatting, Error Reporting, good first issue

#16069 - ENH: support .fillna(method=,limit=Timedelta)

Issue - State: open - Opened by jreback over 8 years ago - 1 comment
Labels: Enhancement, Missing-data, Timedelta

#16007 - HDFStore() create a new file by mode 'a' ,but file name can't be incorrect

Issue - State: open - Opened by imelee over 8 years ago - 6 comments
Labels: Bug, Unicode, IO HDF5, Windows, Closing Candidate

GitHub / pandas-dev/pandas issues and pull requests