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BUG: Inconsistent <code>datetime</code> dtype based on how the dataframe gets initialized

Bug

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

Status: Open.

#61993 In pandas-dev/pandas;

· cosmic-heart opened on Jul 29, 2025

DOC: Point out difference in usage of "str" dtype in constructor and astype member

Docs

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

Status: Open.

#61992 In pandas-dev/pandas;

· cbourjau opened on Jul 29, 2025

BUG: Atribute Error when running as non-superuser

Bug

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

Status: Open.

#61991 In pandas-dev/pandas;

· ialvata opened on Jul 29, 2025

BUG: Boolean Column Indexing Issue in Pandas

Bug

IndexingRelated to indexing on series/frames, not to indexes themselvesRelated to indexing on series/frames, not to indexes themselves

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

Status: Open.

#61980 In pandas-dev/pandas;

· tanjt107 opened on Jul 28, 2025

ENH: Function‑scoped bad‑line callback for read_csv that provides line_number (immediate per‑row handling without global side‑effects)

Enhancement

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

Status: Open.

#61978 In pandas-dev/pandas;

· laelhalawani opened on Jul 27, 2025

BUG: 'Sphinx parallel build error' when building docs locally prevents index.html creation

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

Docs

Needs InfoClarification about behavior needed to assess issueClarification about behavior needed to assess issue

Status: Open.

#61975 In pandas-dev/pandas;

· jeffersbaxter opened on Jul 27, 2025

BUG: The lines skipped by pd.read_csv(path, chunksize=n, on_bad_lines='skip') depends on <code>n</code>.

Bug

IO CSVread_csv, to_csvread_csv, to_csv

Status: Open.

#61973 In pandas-dev/pandas;

· alexbra1 opened on Jul 27, 2025

DOC: shift argument in <code>Series.shift()</code> is not used

Docs

Transformationse.g. cumsum, diff, ranke.g. cumsum, diff, rank

Status: Open.

#61955 In pandas-dev/pandas;

· Dr-Irv opened on Jul 25, 2025

BUG: Using <code>Series.str.fullmatch()</code> and <code>Series.str.match()</code> with a compiled regex fails with arrow strings

Arrowpyarrow functionalitypyarrow functionality

Bug

StringsString extension data type and string dataString extension data type and string data

Status: Open.

#61952 In pandas-dev/pandas;

· Dr-Irv opened on Jul 25, 2025

· 

2.3.2

BUG: Implicit upcast to float64 for large series (more than 1000000 rows)

Bug

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

Status: Open.

#61951 In pandas-dev/pandas;

· stertingen opened on Jul 25, 2025

BUG: border attribute used in html.py was deprecated in HTML5

Bug

IO HTMLread_html, to_html, Styler.apply, Styler.applymapread_html, to_html, Styler.apply, Styler.applymap

Status: Open.

#61949 In pandas-dev/pandas;

· JonahDelman opened on Jul 25, 2025

DOC: Standardize noncompliant docstrings in pandas/io/html.py (flake8-docstrings)

Docs

IO HTMLread_html, to_html, Styler.apply, Styler.applymapread_html, to_html, Styler.apply, Styler.applymap

Status: Open.

#61944 In pandas-dev/pandas;

· gumus-g opened on Jul 25, 2025