Pandas Vectorize DataFrame first_valid_index() and last_valid_index()

Is there a reason why DataFrame first_valid_index() and last_valid_index() don't return a Series with the first/last val...

Pandas ENH: add a float_precision='low' option to read_csv

ProblemUnless we know the column names in advance, it is impossible to prevent read_csv from loading all floats as np.fl...

Pandas ENH: Prettier printing of DataFrames with nested objects, discuss?

I frequently place objects which are not strings or numbers in my DataFrames. I've read many Stack Overflow comments wh...

Pandas QST: Why is resample with high frequency faster than lower frequency

When resampling a pandas DatetimeIndex, why would resampling daily (rule="D") or hourly (rule="H") between two dates be ...

Pandas CI: Unpin hypothesis in wheel builds

The new hypothesis tested limits more strictly causing some build failures.We pinned the version in our wheel build proc...

Pandas CI: Matplotlib 3.6 broke our builds

The version is only pulled on arm builds now, hence only those failhttps://app.circleci.com/pipelines/github/pandas-dev/...

Pandas CI: Numpy 1.22 caused CI to fail

The testFAILED pandas/tests/frame/test_ufunc.py::test_alignment_deprecation_many_inputsis failing.Also we have some typi...

Pandas CI: Unreliable Tests write to S3

Seen this in a few PRs:https://github.com/pandas-dev/pandas/pull/39153/checks?check_run_id=1697646268___________________...

Pandas ArrowIOError: Invalid parquet file. Corrupt footer. When modifying files in S3 (Bump s3fs to 0.4.2)

When loading a file that has been modified in S3 directly with pd.read_parquet() from another terminal, we get the Arro...

Pandas DEV: Upgrade Python development version to 3.9/3.10

We can drop Python 3.8 support soonish, but to get there we have to upgrade our development python version from 3.8. I'd...

Pandas BUG: inconsistent Series/DataFrame behavior in bitwise ops

ser = pd.Series([1, 2], index=['a', 'b'])ser2 = pd.Series([3, 4], index=['b', 'c'])df = ser.to_frame()df2 = ser2.to_fram...

Pandas BUG: Results of series bitwise ufunc operations are being casted to bool in pandas-2.0

Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...

Pandas BUG: Reintroduced #47844

Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...

Pandas Accessing unused columns in pivot_table

related is #6490I am new to pandas but have run into a problem which I believe is a bug.I tried to execute the following...

Pandas BUG: on_bad_lines=callable does not invoke callable for all bad lines

Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...

Pandas BUG: pandas.to_datetime("2023-01-01T15:58:12+09:00", format="%Y-%m-%dT%H:%M:%S.%f%z") has ValueError

Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...

Pandas Changed default regex value in pandas.Series.str.replace not fully updated in docs

In the docstring, we have:https://github.com/pandas-dev/pandas/blob/478d340667831908b5b4bf09a2787a11a14560c9/pandas/core...

Pandas DOC: move from sphinx-panels to sphinx-design

Pandas version checks[X] I have checked that the issue still exists on the latest versions of the docs on main hereLocat...

Pandas BUG: dateframe.to_parquet(byteio, engine="fastparquet")

Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...

Pandas pd.core.groupby.groupby.DataFrameGroupBy.nth yielding false values with Interval MultiIndex Interval

Hi,using a solution for my problem posted on SO, I stumbled upon this bug. Thanks @jorisvandenbossche for looking into t...
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