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BUG: If you add _metadata to a custom subclass of Series, the sequence name is lost when indexing

Bug

metadata_metadata, .attrs_metadata, .attrs

Needs TriageIssue that has not been reviewed by a pandas team memberIssue that has not been reviewed by a pandas team member

Status: Open.

#61491 In pandas-dev/pandas;

· vitalizzare opened on May 24, 2025

PERF: Extreme regression in 2.2 when aggregating a DataFrame with .attrs data

Closing CandidateMay be closeable, needs more eyeballsMay be closeable, needs more eyeballs

Groupby

metadata_metadata, .attrs_metadata, .attrs

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Open.

#60070 In pandas-dev/pandas;

· buhrmann opened on Oct 18, 2024

BUG: Series attrs disappear after modifcation to the DataFrame that contains them.

Bug

metadata_metadata, .attrs_metadata, .attrs

Status: Open.

#57267 In pandas-dev/pandas;

· lendres opened on Feb 5, 2024

ENH: Preserve column attrs when doing column selection

Enhancement

metadata_metadata, .attrs_metadata, .attrs

Status: Open.

#55552 In pandas-dev/pandas;

· kerrickstaley opened on Oct 16, 2023

BUG: concat doesn't preserve attrs (as alternative for append deprecated in 1.4)

API - ConsistencyInternal Consistency of API/BehaviorInternal Consistency of API/Behavior

Enhancement

metadata_metadata, .attrs_metadata, .attrs

Status: Open.

#45824 In pandas-dev/pandas;

· MarcoGorelli opened on Feb 4, 2022

TST: add option for checking attrs in testing

Enhancement

metadata_metadata, .attrs_metadata, .attrs

Testingpandas testing functions or related to the test suitepandas testing functions or related to the test suite

Status: Open.

#44768 In pandas-dev/pandas;

· jreback opened on Dec 5, 2021

ENH: pandas.DataFrame.attrs

Enhancement

metadata_metadata, .attrs_metadata, .attrs

Needs DiscussionRequires discussion from core team before further actionRequires discussion from core team before further action

Status: Open.

#44689 In pandas-dev/pandas;

· shruti-ramaiya opened on Nov 30, 2021

ENH: col descriptions that'd save in df schemas, helping users avoid creating separate documentation?

Enhancement

IO JSONread_json, to_json, json_normalizeread_json, to_json, json_normalize

metadata_metadata, .attrs_metadata, .attrs

Status: Open.

#42582 In pandas-dev/pandas;

· chrisjdixon opened on Jul 17, 2021

BUG: when attrs lost on original dataframe, copy loses the attrs as well

Bug

metadata_metadata, .attrs_metadata, .attrs

Status: Open.

#41572 In pandas-dev/pandas;

· snowman2 opened on May 19, 2021

API: interaction between subclasses (implementing __finalize__) and attrs/flags handling in __finalize__

API Design

metadata_metadata, .attrs_metadata, .attrs

SubclassingSubclassing pandas objectsSubclassing pandas objects

Status: Open.

#37099 In pandas-dev/pandas;

· jorisvandenbossche opened on Oct 13, 2020

BUG: attrs lost for Series in DataFrame

Docs

metadata_metadata, .attrs_metadata, .attrs

Status: Open.

#35425 In pandas-dev/pandas;

· RobertRosca opened on Jul 27, 2020

BUG: DataFrame.attrs are lost when writing to HDF5

Bug

IO HDF5read_hdf, HDFStoreread_hdf, HDFStore

metadata_metadata, .attrs_metadata, .attrs

Status: Open.

#34596 In pandas-dev/pandas;

· ulijh opened on Jun 5, 2020