pandas-dev/pandas issues and pull requests

#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

#15988 - When using to_sql(), continue if duplicate primary keys are detected?

Issue - State: open - Opened by rosstripi over 8 years ago - 41 comments
Labels: Enhancement, IO SQL

#15923 - BUG pd.get_dummies does not propagate `NaN` correctly

Issue - State: open - Opened by beckermr over 8 years ago - 18 comments
Labels: Enhancement, Missing-data, Reshaping, Needs Discussion

#15752 - TST: full dtype tests for .drop_duplicates and .duplicated

Issue - State: closed - Opened by jreback over 8 years ago - 2 comments
Labels: Dtype Conversions, Needs Tests, duplicated

#15706 - Series.map on a Categorical with a function only processes each unique value once

Issue - State: open - Opened by Kodiologist over 8 years ago - 2 comments
Labels: Docs, Categorical

#15675 - ENH: enable skipna on groupby reduction ops

Issue - State: open - Opened by jreback over 8 years ago - 12 comments
Labels: Enhancement, Groupby, Master Tracker, API - Consistency, Reduction Operations

#15633 - Negative timedeltas not working correctly

Issue - State: closed - Opened by dstansby over 8 years ago - 6 comments
Labels: Output-Formatting, Timedelta

#15609 - DOC: inconsistent docs-string signatures for shared functions

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

#15550 - API: expose to_numeric/to_datetime/to_timedelta methods on Series

Issue - State: closed - Opened by jreback over 8 years ago - 5 comments
Labels: Enhancement, Needs Discussion, Closing Candidate

#15392 - DataFrame.to_excel with xlsxwriter and constant_memory makes most of the cells empty

Issue - State: open - Opened by mhooreman over 8 years ago - 6 comments
Labels: Bug, IO Excel

#15364 - Huge performance hit in get_indexer_non_unique

Issue - State: closed - Opened by horta over 8 years ago - 8 comments
Labels: Indexing, Performance, MultiIndex

#15357 - cannot get cut() to display desired bins label

Issue - State: open - Opened by qAp over 8 years ago - 5 comments
Labels: Docs, Numeric Operations, cut

#15354 - Rolling window with step size

Issue - State: closed - Opened by alexlouden over 8 years ago - 41 comments
Labels: Enhancement, Needs Discussion, Window

#15304 - passing a function to DataFrameGroupBy.agg - confusing documentation/behaviour

Issue - State: open - Opened by colinmorris over 8 years ago - 7 comments
Labels: Docs, Groupby, Apply

#15302 - BUG: read_csv with date_parser lock file open on failure

Issue - State: closed - Opened by rsheftel over 8 years ago - 18 comments
Labels: IO CSV, good first issue, Needs Tests

#15275 - DataFrameGroupBy.idxmin() returns DataFrame, documentation says Series

Issue - State: closed - Opened by pganssle over 8 years ago - 11 comments
Labels: Docs, Groupby, good first issue

#15252 - .loc with date string and timestamp behave differently

Issue - State: closed - Opened by KwangmooKoh over 8 years ago - 3 comments
Labels: Bug, Datetime, Indexing, MultiIndex

#15231 - Spurious casting to float when assigning both integers and floats

Issue - State: open - Opened by toobaz over 8 years ago - 8 comments
Labels: Bug, Indexing, Dtype Conversions, setitem-with-expansion

#15133 - Some problems with list in read_excel()

Issue - State: open - Opened by ArtyomKaltovich over 8 years ago - 12 comments
Labels: Bug, IO Excel

#15105 - `sort=False` option to stack/unstack/pivot

Issue - State: closed - Opened by naught101 over 8 years ago - 11 comments
Labels: Enhancement, Reshaping, MultiIndex

#15068 - Pre-compute the size of an outer merge and raise MemoryError if merge will be too large

Issue - State: closed - Opened by mproffitt over 8 years ago - 9 comments
Labels: Enhancement, Performance, Reshaping, Error Reporting

#15047 - Treat Series as 1-column dataframe in concat with dataframe

Issue - State: open - Opened by jcrist over 8 years ago - 6 comments
Labels: Bug, Reshaping

#14833 - Multiarray searchsorted fails

Issue - State: open - Opened by Anaphory almost 9 years ago - 16 comments
Labels: Enhancement, Error Reporting, MultiIndex, good first issue

#14775 - Severe performance problems with multi-index joins

Issue - State: closed - Opened by SReicheltPTV almost 9 years ago - 5 comments
Labels: Performance, Reshaping, MultiIndex

#14701 - groupby boxplot doesn't work if multiple by's are used

Issue - State: closed - Opened by languitar almost 9 years ago - 2 comments
Labels: Bug, Groupby, Visualization, MultiIndex

#14601 - DOC: min_itemsize for HDFStore append for encoded strings

Issue - State: open - Opened by johanneshk almost 9 years ago - 8 comments
Labels: Docs, IO HDF5, good first issue

#14574 - value_counts failed on unique list values

Issue - State: closed - Opened by name-yy almost 9 years ago - 3 comments
Labels: Reshaping, Dtype Conversions, Compat

#14518 - ENH: add np.nan* functions to map for groupby/rolling/resample aggregators

Issue - State: closed - Opened by jreback almost 9 years ago - 5 comments
Labels: Enhancement, Groupby, Resample, Window

#14493 - ENH: Add sparse option in pivot_table / pivot / unstack

Issue - State: open - Opened by yupbank almost 9 years ago - 10 comments
Labels: Enhancement, Reshaping, Sparse

#14407 - BUG: need to block split when filling na

Issue - State: open - Opened by jreback almost 9 years ago - 9 comments
Labels: good first issue, Needs Tests

#14315 - to_sql function takes forever to insert in oracle database

Issue - State: closed - Opened by rajattjainn about 9 years ago - 11 comments
Labels: Performance, IO SQL

#14235 - BUG: Python operator 'in' behaves in two different ways on Series object

Issue - State: open - Opened by griai about 9 years ago - 23 comments
Labels: Docs, Needs Discussion

#14210 - Option to Raise Exception on Unmapped Value in Series.map

Issue - State: open - Opened by cancan101 about 9 years ago - 8 comments
Labels: Enhancement, Missing-data, Error Reporting

#14162 - Unexpected results for the mean of a DataFrame of ufloat from the uncertainties package.

Issue - State: open - Opened by bgatessucks about 9 years ago - 17 comments
Labels: Enhancement, Numeric Operations, ExtensionArray, Reduction Operations

#14150 - SettingWithCopy dependence on reference count

Issue - State: closed - Opened by pkch about 9 years ago - 9 comments
Labels: Bug, Indexing, Warnings, Copy / view semantics

#14102 - No labels on X-axis on charts with secondary_y=True

Issue - State: closed - Opened by dmage about 9 years ago - 4 comments
Labels: Bug, Visualization, Needs Tests

#14074 - Pandas does not respect shared axes in matplotlib

Issue - State: open - Opened by danfrankj about 9 years ago - 4 comments
Labels: Bug, Visualization

#14013 - Rolling groupby should not maintain the by column in the resulting DataFrame

Issue - State: closed - Opened by chrisaycock about 9 years ago - 13 comments
Labels: Bug, Groupby, Reshaping, API Design

#13992 - SeriesGroupby.cumsum raises on object dtype

Issue - State: closed - Opened by agraboso about 9 years ago - 3 comments
Labels: Bug, Groupby, Strings

#13950 - DOC: more documentation that pandas by-default aligns when setting

Issue - State: open - Opened by IamGianluca about 9 years ago - 4 comments
Labels: Docs, Indexing, good first issue

#13829 - Incorrect timedelta type coercion when doing in-place .loc expansion

Issue - State: open - Opened by bmcfee about 9 years ago - 3 comments
Labels: Bug, Dtype Conversions, Timedelta, Needs Tests, setitem-with-expansion

#13658 - Assignment to multiple columns only works if they existed before

Issue - State: closed - Opened by jzwinck about 9 years ago - 8 comments
Labels: Bug, Indexing

#13488 - ENH: df.add fill_value NotImplementedError

Issue - State: closed - Opened by neverforgit over 9 years ago - 4 comments
Labels: Enhancement, Missing-data, Numeric Operations, Needs Discussion

#13465 - appending with multi-level series converts to single-level series

Issue - State: closed - Opened by abremod over 9 years ago - 4 comments
Labels: Bug, Indexing, Regression, MultiIndex

#13457 - PERF: large subset of block cast

Issue - State: closed - Opened by chris-b1 over 9 years ago - 2 comments
Labels: Indexing, Performance, Internals

#13439 - Feature request: read_excel to support hyperlinks split into label and hyperlink

Issue - State: open - Opened by DocViper666 over 9 years ago - 15 comments
Labels: Enhancement, IO Excel

#13302 - Inconsistent Handling of na_values and converters in read_csv

Issue - State: open - Opened by gfyoung over 9 years ago - 4 comments
Labels: Bug, IO CSV

#13217 - BUG: groupby, as_index=False still returning group variable as index

Issue - State: closed - Opened by nickeubank over 9 years ago - 13 comments
Labels: Bug, Groupby, good first issue, Needs Tests

#13194 - align with broadcast_axis specified always uses inner join when aligning dataframe and series on other axis.

Issue - State: closed - Opened by kdebrab over 9 years ago - 4 comments
Labels: Bug, Reshaping

#13159 - DOC: floating point precision on writing/reading to csv

Issue - State: open - Opened by FBartlett over 9 years ago - 8 comments
Labels: Docs, IO CSV, good first issue

#13049 - Improve type handling in read_sql and read_sql_table

Issue - State: open - Opened by rsdenijs over 9 years ago - 17 comments
Labels: Enhancement, Dtype Conversions, IO SQL

#12960 - CLN/API: combine .swaplevel() into generic

Issue - State: closed - Opened by jreback over 9 years ago - 2 comments
Labels: Enhancement, MultiIndex, API - Consistency

#12945 - eval should handle ternary operator

Issue - State: open - Opened by benjello over 9 years ago - 4 comments
Labels: Enhancement, expressions

#12869 - BUG: duplicated() on a empty DataFrame or a DataFrame with an empty subset of columns with a non-empty index

Issue - State: open - Opened by sebov over 9 years ago - 15 comments
Labels: Bug, Missing-data, duplicated

#12867 - COMPAT: show a PerformanceWarning if numexpr is not installed when using .query/.eval

Issue - State: closed - Opened by jreback over 9 years ago - 1 comment
Labels: Enhancement, Warnings, expressions

#12861 - BUG: indexing with boolean array and categoricals

Issue - State: closed - Opened by jreback over 9 years ago - 2 comments
Labels: Bug, Indexing, Categorical

#12827 - Indexing MultiIndex level depends on chosen level

Issue - State: closed - Opened by toobaz over 9 years ago - 18 comments
Labels: Bug, Indexing, MultiIndex

#12826 - resample() / DatetimeIndexResampler is not resampling according to the given frequency rule

Issue - State: open - Opened by gabrielcnr over 9 years ago - 3 comments
Labels: Bug, Frequency, Resample

#12694 - BUG: Series.argsort() incorrect handling of NaNs

Issue - State: closed - Opened by seth-p over 9 years ago - 13 comments
Labels: Bug, Missing-data, Algos

#12691 - BUG: Week ('W') does not work as suffixes for a string passed to Timedelta.

Issue - State: open - Opened by belteshassar over 9 years ago - 4 comments
Labels: Bug, Timedelta

#12649 - BUG: pandas.to_datetime() does not respect exact format string with ISO8601

Issue - State: closed - Opened by ssche over 9 years ago - 36 comments
Labels: Enhancement, Timeseries, Needs Discussion

#12562 - PERF: use lib.write_csv_rows for encoded data when writing to csv

Issue - State: closed - Opened by jreback over 9 years ago - 5 comments
Labels: Performance, Unicode, IO CSV

#12536 - ENH: support timedeltas with window functions

Issue - State: closed - Opened by jreback over 9 years ago - 1 comment
Labels: Enhancement, Timedelta, Window

#12520 - ENH: add .dropinf() and/or .dropna(drop_inf=True) methods

Issue - State: closed - Opened by adrivsh over 9 years ago - 9 comments
Labels: Enhancement, Missing-data, Needs Discussion

#12509 - append a categorical with different categories to the existing

Issue - State: open - Opened by dneise over 9 years ago - 5 comments
Labels: Docs, Categorical, good first issue

#12454 - Feature Request: enhance DatetimeIndex formatting if freq=None

Issue - State: closed - Opened by RolandRitt over 9 years ago - 2 comments
Labels: Enhancement, Timeseries, Visualization

#12452 - Feature request: groupby.plot() and groupby.hist() add groupname as figure title

Issue - State: open - Opened by RolandRitt over 9 years ago - 4 comments
Labels: Enhancement, Groupby, Visualization

#12430 - Cython-optimized expanding apply transformations

Issue - State: closed - Opened by bschreck over 9 years ago - 7 comments
Labels: Enhancement, Performance, Apply, Window

#12343 - Weird assignment behaviour with MultiIndex

Issue - State: closed - Opened by mvds314 over 9 years ago - 3 comments
Labels: Bug, Indexing, MultiIndex

#12286 - Feature suggestion: flexible hierarchical data (json) importer (will implement if interest exists)

Issue - State: closed - Opened by tkluck over 9 years ago - 9 comments
Labels: Enhancement, IO JSON

#12272 - ENH: Make use of RangeIndex in DatetimeIndex

Issue - State: closed - Opened by kawochen over 9 years ago - 5 comments
Labels: Timeseries, Performance, Index

#12265 - Reading table with chunksize still pumps the memory

Issue - State: closed - Opened by klonuo over 9 years ago - 14 comments
Labels: Usage Question, IO SQL

#12257 - use_inf_as_null makes fillna extremely slow

Issue - State: closed - Opened by Winand over 9 years ago - 4 comments
Labels: Missing-data, Performance

#12255 - Assignment to mixed-type DataFrame with float32 coerce to float64

Issue - State: closed - Opened by fnielsen over 9 years ago - 8 comments
Labels: Bug, Indexing, Dtype Conversions

#12093 - ENH: allow multiple rolling quantiles in one pass

Issue - State: closed - Opened by StephenKappel over 9 years ago - 9 comments
Labels: Enhancement, Performance, Window, quantile

#11953 - BUG: fillna('') does not replace NaT

Issue - State: open - Opened by jreback over 9 years ago - 17 comments
Labels: Bug, Datetime, Missing-data

#11866 - DataFrame.describe(percentiles=[]) still returns 50% percentile.

Issue - State: closed - Opened by dragoljub almost 10 years ago - 13 comments
Labels: Docs, Numeric Operations

#11862 - Plot PeriodIndex data with steps

Issue - State: closed - Opened by egpbos almost 10 years ago - 4 comments
Labels: Enhancement, Visualization, Period

#11700 - CLN/API: implemented to_html in terms of .style

Issue - State: closed - Opened by jreback almost 10 years ago - 17 comments
Labels: Output-Formatting, API Design, IO HTML, Clean, Styler

#11583 - Enhancement: add fuzzy join ability

Issue - State: closed - Opened by lminer almost 10 years ago - 2 comments
Labels: Enhancement, Reshaping

#11574 - Misaligned shared axes between timeseries plots of different frequency.

Issue - State: open - Opened by juseg almost 10 years ago - 7 comments
Labels: Bug, Visualization

#11537 - BUG/API: Clarify the behaviour of fillna downcasting

Issue - State: closed - Opened by sinhrks almost 10 years ago - 3 comments
Labels: Bug, Missing-data

#11520 - df.plot(ax=ax) AttributeError: 'Axes' object has no attribute 'is_first_col'

Issue - State: closed - Opened by dragoljub almost 10 years ago - 11 comments
Labels: Visualization

#11503 - Pandas' read_excel, ExcelFile, failing to open some .xls files.

Issue - State: closed - Opened by jbwhit almost 10 years ago - 29 comments
Labels: IO Excel

#11501 - Pandas display.date option not working

Issue - State: closed - Opened by ProfPh almost 10 years ago - 10 comments
Labels: Enhancement, Testing, Timeseries, Output-Formatting

#11373 - Request for some kind of named arguments loc

Issue - State: closed - Opened by szaiser almost 10 years ago - 13 comments
Labels: Enhancement, Indexing, MultiIndex, Needs Discussion

#11355 - PERF: refactor ExcelFormatter

Issue - State: closed - Opened by chris-b1 almost 10 years ago - 9 comments
Labels: Performance, IO Excel

#11292 - Export to excel for multiindex columns

Issue - State: open - Opened by jurukode almost 10 years ago - 15 comments
Labels: Enhancement, IO Excel, MultiIndex

GitHub / pandas-dev/pandas issues and pull requests