github.com/pandas-dev/pandas issues | Ecosyste.ms: OpenCollective

Support axis=None in all reductions

TomAugspurger opened this issue over 6 years ago

TST: Change class-based auto-use setup to fixtures

TomAugspurger opened this issue over 6 years ago

Error when unpickling subclass of pandas.DataFrame: __getstate__ doesn't return _item_cache and __setstate__ doesn't set self._internal_names before setting self._metadata

hlums opened this issue over 6 years ago

Time Series Interpolation is wrong

oricou opened this issue over 6 years ago

ENH: allow lists/sets in fillna

h-vetinari opened this issue over 6 years ago

BUG: Series(DTI/TDI) loses the frequency information from original DTI/TDI

jschendel opened this issue over 6 years ago

A map method to work with many columns

oricou opened this issue almost 7 years ago

High Memory Usage when Concatenating Partially Indexed Series to Multiindexed Dataframe

cyniphile opened this issue almost 7 years ago

DOC clarify that pct_change() scale is actually 0-1, i.e. fractional_change()

sunilshah opened this issue almost 7 years ago

Rolling sum (closed='left') with duplicate Timestamp indices.

avivbd opened this issue almost 7 years ago

DataFrame.groupby.sum() is extremely slow when dtype is timedelta64[ns] compared to int64.

wezzman opened this issue almost 7 years ago

ERR: pivot_table when number of levels larger than int32 range

mklwong opened this issue almost 7 years ago

TST: Extract methods from TestXMySQL and TestXSQLite and remove

TomAugspurger opened this issue almost 7 years ago

ENH adding metadata argument to DataFrame.to_parquet

JacekPliszka opened this issue almost 7 years ago

DEPR: Series.view

jreback opened this issue almost 7 years ago

CLN: remove fastpath & verify_integrity from constructors

jreback opened this issue almost 7 years ago

Concat slow when frames indexed separately

jeremywhelchel opened this issue almost 7 years ago

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

spott opened this issue almost 7 years ago

BUG: Retain timezone dtype with cut and qcut

mroeschke opened this pull request almost 7 years ago

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

denfromufa opened this issue almost 7 years ago

auto convert from string to datetime64 in iterrows.

xiaoluffy opened this issue almost 7 years ago

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

leezu opened this issue almost 7 years ago

DataFrame.__setitem__ performance regression with object dtype

TomAugspurger opened this issue about 7 years ago

read_csv issues with dict for na_values

neilser opened this issue about 7 years ago

Document our pytest fixtures

TomAugspurger opened this issue about 7 years ago

ENH: A cheap copy on a dataframe

has2k1 opened this issue about 7 years ago

DatetimeIndex comparison with ndim>1 incorrect or raises

jbrockmendel opened this issue about 7 years ago

CLN: Refactor nanops' empty array handling

TomAugspurger opened this issue about 7 years ago

Some interesting behavior from .groupby().apply( .to_records() )

alexlenail opened this issue about 7 years ago

Groupby doesn't call aggregation on empty groups

TomAugspurger opened this issue about 7 years ago

Offsets Roundup

jbrockmendel opened this issue about 7 years ago

Series not honoring class __repr__ or __str__

achapkowski opened this issue about 7 years ago

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

haimivan opened this issue about 7 years ago

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

tdpetrou opened this issue about 7 years ago

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

AKuederle opened this issue about 7 years ago

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

toobaz opened this issue about 7 years ago

search path of pandas read_csv function

ardeal opened this issue about 7 years ago

DataFrame.interpolate() failes with complex dtype

jennirinker opened this issue over 7 years ago

CI: turn on debug builds on windows

jreback opened this issue over 7 years ago

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

jorisvandenbossche opened this issue over 7 years ago

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

toobaz opened this issue over 7 years ago

ENH? to_datetime: ability to infer unit for numeric values

cailiang9 opened this issue over 7 years ago

Please add force_suffixes to pandas.merge()

sorenwacker opened this issue over 7 years ago

Use Turbodbc/Arrow for read_sql_table

mrocklin opened this issue over 7 years ago

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

tdpetrou opened this issue over 7 years ago

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

luisdelatorre012 opened this issue over 7 years ago

Accept dictionaries for mapping categories in Categorical Data

robertour opened this issue over 7 years ago

Groupy chunks are garbage-collected even if still referenced

toobaz opened this issue over 7 years ago

Simultaneously melt multiple columns

tdpetrou opened this issue over 7 years ago

API: column ordering on `get_dummies` #12010

Giftlin opened this issue over 7 years ago

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

jreback opened this issue over 7 years ago

DatetimeIndex plot converter performance

jondoesntgit opened this issue over 7 years ago

Inconsistent results for groupby on multiple columns with NaN value

linar-jether opened this issue over 7 years ago

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

randomgambit opened this issue over 7 years ago

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

skynss opened this issue over 7 years ago

COMPAT: safe argsort in Index/Series

jreback opened this issue over 7 years ago

API: provide a to_enum method for Categorical dtypes?

chris-b1 opened this issue over 7 years ago

Unexpected results creating an empty Series

AllenDowney opened this issue over 7 years ago

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

prabhatM opened this issue over 7 years ago

False positive SettingWithCopyWarning when just taking subset of columns

jorisvandenbossche opened this issue over 7 years ago

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

christian-eriksson opened this issue over 7 years ago

API/DEPR: Deprecate inplace parameter

gfyoung opened this issue over 7 years ago

More memory efficient hash tables

rohanp opened this issue over 7 years ago

Categorical handles imaginary values incorrectly

TomAugspurger opened this issue over 7 years ago

BUG: Bins are unexpected for qcut when the edges are duplicated

artturib opened this issue over 7 years ago

Documentation on Performance considerations

Dr-Irv opened this issue over 7 years ago

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

Midnighter opened this issue over 7 years ago

ERR: DataFrame can get into unprintable state

chris-b1 opened this issue almost 8 years ago

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

jreback opened this issue almost 8 years ago

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

imelee opened this issue almost 8 years ago

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

rosstripi opened this issue almost 8 years ago

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

Kodiologist opened this issue almost 8 years ago

ENH: enable skipna on groupby reduction ops

jreback opened this issue almost 8 years ago

DOC: inconsistent docs-string signatures for shared functions

jreback opened this issue almost 8 years ago

API: expose to_numeric/to_datetime/to_timedelta methods on Series

jreback opened this issue almost 8 years ago

Huge performance hit in get_indexer_non_unique

horta opened this issue almost 8 years ago

BUG: read_csv with date_parser lock file open on failure

rsheftel opened this issue almost 8 years ago

Spurious casting to float when assigning both integers and floats

toobaz opened this issue about 8 years ago

`sort=False` option to stack/unstack/pivot

naught101 opened this issue about 8 years ago

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

mproffitt opened this issue about 8 years ago

Treat Series as 1-column dataframe in concat with dataframe

jcrist opened this issue about 8 years ago

Severe performance problems with multi-index joins

SReicheltPTV opened this issue about 8 years ago

value_counts failed on unique list values

name-yy opened this issue about 8 years ago

BUG: need to block split when filling na

jreback opened this issue over 8 years ago

to_sql function takes forever to insert in oracle database

rajattjainn opened this issue over 8 years ago

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

griai opened this issue over 8 years ago

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

bgatessucks opened this issue over 8 years ago

SettingWithCopy dependence on reference count

pkch opened this issue over 8 years ago

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

IamGianluca opened this issue over 8 years ago

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

bmcfee opened this issue over 8 years ago

ENH: df.add fill_value NotImplementedError

neverforgit opened this issue over 8 years ago

PERF: large subset of block cast

chris-b1 opened this issue over 8 years ago

Inconsistent Handling of na_values and converters in read_csv

gfyoung opened this issue over 8 years ago

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

nickeubank opened this issue over 8 years ago

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

gabrielcnr opened this issue almost 9 years ago

BUG: Series.argsort() incorrect handling of NaNs

seth-p opened this issue almost 9 years ago

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

belteshassar opened this issue almost 9 years ago

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

jreback opened this issue almost 9 years ago

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

adrivsh opened this issue almost 9 years ago

append a categorical with different categories to the existing

dneise opened this issue almost 9 years ago