id int64 | number int64 | title string | state string | created_at timestamp[s] | updated_at timestamp[s] | closed_at timestamp[s] | html_url string | is_pull_request bool | pull_request_url string | pull_request_html_url string | user_login string | comments_count int64 | body string | labels list | reactions_plus1 int64 | reactions_minus1 int64 | reactions_laugh int64 | reactions_hooray int64 | reactions_confused int64 | reactions_heart int64 | reactions_rocket int64 | reactions_eyes int64 | comments list |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
3,237,012,125 | 61,879 | DOC: Document that str.match accepts a regular expression | open | 2025-07-16T18:52:17 | 2025-07-26T07:35:54 | null | https://github.com/pandas-dev/pandas/pull/61879 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61879 | https://github.com/pandas-dev/pandas/pull/61879 | hamdanal | 0 | Similar to str.fullmatch and other methods that accept regular expressions
- [ ] closes #xxxx (Replace xxxx with the GitHub issue number)
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All ... | [
"Docs",
"API Design",
"API - Consistency"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,236,918,446 | 61,878 | DOC: update Parquet IO user guide on index handling and type support across engines | closed | 2025-07-16T18:16:55 | 2025-07-17T05:33:35 | 2025-07-16T21:29:00 | https://github.com/pandas-dev/pandas/pull/61878 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61878 | https://github.com/pandas-dev/pandas/pull/61878 | jorisvandenbossche | 1 | It seems this section of our documentation was quite outdated. Have updated it to the best of my knowledge and based on some testing. | [
"Docs",
"IO Parquet"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @jorisvandenbossche "
] |
3,236,839,383 | 61,877 | DOC: show Parquet examples with default engine (without explicit pyarrow/fastparquet engine keyword) | closed | 2025-07-16T17:54:14 | 2025-07-17T05:33:38 | 2025-07-16T21:27:45 | https://github.com/pandas-dev/pandas/pull/61877 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61877 | https://github.com/pandas-dev/pandas/pull/61877 | jorisvandenbossche | 1 | Encountered this in https://github.com/pandas-dev/pandas/pull/61864, but in general for the readability of our doc page, I feel that it is not needed to show every single code example in this section with both pyarrow and fastparquet (certainly because in practice the fastparquet result is then ignored, and we only sho... | [
"Docs",
"IO Parquet"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @jorisvandenbossche "
] |
3,236,796,639 | 61,876 | ERR: improve exception message from timedelta64-datetime64 | closed | 2025-07-16T17:41:05 | 2025-07-16T21:32:56 | 2025-07-16T21:30:16 | https://github.com/pandas-dev/pandas/pull/61876 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61876 | https://github.com/pandas-dev/pandas/pull/61876 | jbrockmendel | 1 | - [x] closes #59571 (Replace xxxx with the GitHub issue number)
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/co... | [
"Error Reporting"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @jbrockmendel "
] |
3,236,633,105 | 61,875 | API: IncompatibleFrequency subclass TypeError | closed | 2025-07-16T16:42:14 | 2025-07-18T14:37:42 | 2025-07-18T00:53:24 | https://github.com/pandas-dev/pandas/pull/61875 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61875 | https://github.com/pandas-dev/pandas/pull/61875 | jbrockmendel | 1 | - [x] closes #55782 (Replace xxxx with the GitHub issue number)
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/co... | [
"Error Reporting"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @jbrockmendel "
] |
3,236,428,918 | 61,874 | API: np.isinf on Index return Index[bool] | closed | 2025-07-16T15:32:29 | 2025-07-16T17:09:03 | 2025-07-16T16:26:06 | https://github.com/pandas-dev/pandas/pull/61874 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61874 | https://github.com/pandas-dev/pandas/pull/61874 | jbrockmendel | 1 | - [x] closes #52676 (Replace xxxx with the GitHub issue number)
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/co... | [
"Index"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @jbrockmendel "
] |
3,235,888,714 | 61,873 | BUG:float_precision type hints differ in release version from github and docs pandas==2.3.1 | closed | 2025-07-16T13:01:08 | 2025-07-22T12:26:03 | 2025-07-22T12:26:03 | https://github.com/pandas-dev/pandas/issues/61873 | true | null | null | mas-4 | 1 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [ ] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug",
"IO CSV",
"Typing",
"Closing Candidate"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"The referenced commit will not be released until pandas 3.0.\n\nhttps://github.com/pandas-dev/pandas/pull/56915\n\nI believe this will resolve the issue."
] |
3,235,305,025 | 61,872 | TST: add test for `dtype` argument in `str.decode` | closed | 2025-07-16T10:08:10 | 2025-07-28T17:24:11 | 2025-07-28T17:24:05 | https://github.com/pandas-dev/pandas/pull/61872 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61872 | https://github.com/pandas-dev/pandas/pull/61872 | hippowm | 1 | This PR adds a test case for `str.decode` and ensures it correctly infers the string datatype, when `dtype=None` and the option `future.infer_string` is used. This argument was introduced in PR https://github.com/pandas-dev/pandas/pull/60940 but has no test for None. This test adds coverage to the following line:
... | [
"Testing"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @hippowm "
] |
3,234,645,403 | 61,871 | BUG FIX: None of the included dtypes present in df will raise ValueError with clear error message. | open | 2025-07-16T06:22:56 | 2025-07-26T16:36:32 | null | https://github.com/pandas-dev/pandas/pull/61871 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61871 | https://github.com/pandas-dev/pandas/pull/61871 | khemkaran10 | 3 | Before Fix:
```python
>>> df = pd.DataFrame({"a": [1, 2, 3]})
>>> df.describe(include=["datetime"])
...
ValueError: No objects to concatenate
```
After Fix:
```python
>>> df = pd.DataFrame({"a": [1, 2, 3]})
>>> df.describe(include=["datetime"])
...
ValueError: No columns match the specified include or exclu... | [
"Error Reporting"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"pre-commit.ci autofix",
"```\r\ndf = pd.DataFrame({\"a\": [1, 2, 3]})\r\ndf.describe(exclude=[np.int64])\r\n...\r\nValueError: None of the included dtypes are present in the DataFrame\r\n```\r\n\r\nAfter the fix, this example will also show the same error. Should we change the error message to something like, \r... |
3,234,406,455 | 61,870 | BUG: Fix inconsistency with DateOffset near DST | open | 2025-07-16T04:29:43 | 2025-08-21T21:17:38 | null | https://github.com/pandas-dev/pandas/pull/61870 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61870 | https://github.com/pandas-dev/pandas/pull/61870 | arthurlw | 3 | - [x] closes #61862
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ]... | [
"Frequency",
"Stale"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"can you add a whatsnew note",
"pre-commit.ci autofix",
"This pull request is stale because it has been open for thirty days with no activity. Please [update](https://pandas.pydata.org/pandas-docs/stable/development/contributing.html#updating-your-pull-request) and respond to this comment if you're still intere... |
3,234,352,456 | 61,869 | BUG: Fix logical method Non 1D Extension Arrays | closed | 2025-07-16T03:54:25 | 2025-07-16T15:57:22 | 2025-07-16T15:41:18 | https://github.com/pandas-dev/pandas/pull/61869 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61869 | https://github.com/pandas-dev/pandas/pull/61869 | tisjayy | 1 | - [x] closes #61866
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Now, ExtensionArrays handle these cases like NumPy arrays do by returning NotImplemented when they can’t perform the operation.\r\nSo if the other operand can handle it, it takes over and the operation succeeds instead of just showing error and stopping execution for the entire code.\r\n\r\n\r\n"
] |
3,233,935,527 | 61,868 | DOC: Add Raises section to to_numeric docstring | closed | 2025-07-15T23:14:46 | 2025-07-16T16:29:53 | 2025-07-16T16:29:47 | https://github.com/pandas-dev/pandas/pull/61868 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61868 | https://github.com/pandas-dev/pandas/pull/61868 | tisjayy | 2 | - [x] closes #61811
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [x... | [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"I don't think any problem should occur with the checks. ",
"Thanks @tisjayy "
] |
3,233,725,225 | 61,867 | Fix logical operations broadcasting for 2D ExtensionArrays | closed | 2025-07-15T21:16:38 | 2025-07-15T21:44:05 | 2025-07-15T21:39:48 | https://github.com/pandas-dev/pandas/pull/61867 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61867 | https://github.com/pandas-dev/pandas/pull/61867 | tisjayy | 1 | - [ ] closes #61866
- [ ] Tests added and passed (local tests not run due to environment setup, but CI will run them)
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [x] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"GitHub says the diff is almost 9 million lines. What’s happening here?"
] |
3,233,525,321 | 61,866 | BUG: Operations not implemented for non-1D ExtensionArrays | closed | 2025-07-15T19:55:29 | 2025-08-14T22:39:02 | 2025-08-14T22:39:02 | https://github.com/pandas-dev/pandas/issues/61866 | true | null | null | eicchen | 2 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [x] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug",
"Numeric Operations",
"NA - MaskedArrays"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"I changed the logical method in boolean.py so ExtensionArrays handle these cases like NumPy arrays do by returning NotImplemented when they can’t perform the operation. So Python can try other ways instead of showing error. Lets see if it passes the code checks. ",
"@jbrockmendel this pr should fix it, please re... |
3,232,796,055 | 61,865 | DOC: Simplify footer wording in documentation (#51536) | closed | 2025-07-15T15:45:11 | 2025-07-16T16:32:35 | 2025-07-16T16:32:35 | https://github.com/pandas-dev/pandas/pull/61865 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61865 | https://github.com/pandas-dev/pandas/pull/61865 | hriday-goyal | 1 | This PR simplifies the wording in the pandas documentation footer for improved readability and clarity.
Fixes: #51536 | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks for this PR but this is already being worked on in https://github.com/pandas-dev/pandas/pull/61859 so closing"
] |
3,232,666,176 | 61,864 | DOC: make doc build run with string dtype enabled | closed | 2025-07-15T15:09:32 | 2025-07-17T08:31:12 | 2025-07-17T08:31:08 | https://github.com/pandas-dev/pandas/pull/61864 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61864 | https://github.com/pandas-dev/pandas/pull/61864 | jorisvandenbossche | 1 | ~First commit is from https://github.com/pandas-dev/pandas/pull/61722 (will be removed here after that PR is merged and this one is rebased)~, then subsequent commits enable errors on the doc build again and fix issues. | [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Going to merge this already to make sure the dev docs are back up. But happy to follow-up with any comment."
] |
3,232,435,167 | 61,863 | BUG: describe(include=..) fails with unrelated error if provided data types are not present | open | 2025-07-15T14:09:59 | 2025-07-16T06:42:59 | null | https://github.com/pandas-dev/pandas/issues/61863 | true | null | null | jorisvandenbossche | 3 | Example with current main:
```
>>> df = pd.DataFrame({"a": [1, 2, 3]})
>>> df.describe(include=["datetime"])
...
ValueError: No objects to concatenate
```
I assume the error comes from under the hood trying to concatenate the results of calculating the describe results for each of the incluced dtype groups, and in th... | [
"Bug",
"Error Reporting"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"@jorisvandenbossche we can wrap [concat](https://github.com/pandas-dev/pandas/blob/bc6ad140daf230c470fef92bec598831d4f94a16/pandas/core/methods/describe.py#L175C9-L180C10) call in a try-except block and raise a clear error for this case. or we can add a check for \"ldesc\" . I'm happy to open a PR for this.",
"S... |
3,232,408,118 | 61,862 | BUG: DateOffset default temporal pattern does not work as expected with DST | open | 2025-07-15T14:02:55 | 2025-07-17T18:30:22 | null | https://github.com/pandas-dev/pandas/issues/61862 | true | null | null | ValentinBilla | 0 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [x] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug",
"Frequency"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,231,339,659 | 61,861 | BUG: pd.eval raises AttributeError: 'BinOp' object has no attribute 'value' | closed | 2025-07-15T08:32:29 | 2025-07-15T08:47:04 | 2025-07-15T08:47:03 | https://github.com/pandas-dev/pandas/issues/61861 | true | null | null | auderson | 1 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [ ] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug",
"Needs Triage"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Looks like it's fixed on main, but not merged yet. Closing."
] |
3,231,184,894 | 61,860 | ENH: New method "ends" as a combination of “head” and "tail" | closed | 2025-07-15T07:43:12 | 2025-08-05T16:28:53 | 2025-08-05T16:28:53 | https://github.com/pandas-dev/pandas/issues/61860 | true | null | null | JoergVanAken | 3 | ### Feature Type
- [x] Adding new functionality to pandas
- [ ] Changing existing functionality in pandas
- [ ] Removing existing functionality in pandas
### Problem Description
I often work with time series and want to see at a glance where and how they begin and end.
### Feature Description
That's why I reg... | [
"Enhancement",
"Needs Triage",
"Closing Candidate"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Im skeptical of this. The API is already big and we generally avoid adding methods with an easy alternative already available. Will leave this open in case others disagree.",
"agree with @jbrockmendel and that we should prioritize minimal APIs and expect users to compose functionality using existing methods.\n\... |
3,230,907,178 | 61,859 | Doc simplify footer | closed | 2025-07-15T06:04:19 | 2025-07-28T17:24:56 | 2025-07-28T17:24:56 | https://github.com/pandas-dev/pandas/pull/61859 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61859 | https://github.com/pandas-dev/pandas/pull/61859 | Siryoos | 1 | [x] closes #51536 - Simplified pandas theme footer by removing custom template dependency
[x] Tests added and passed - Documentation changes don't require additional tests, but the build process validates the changes
[x] All code checks passed - Changes follow pandas documentation standards and use proper reStructure... | [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks for the pull request, but it appears to have gone stale. If interested in continuing, please merge in the main branch, address any review comments and/or failing tests, and we can reopen."
] |
3,230,132,228 | 61,858 | Upgraded README.md | closed | 2025-07-14T21:50:23 | 2025-07-14T23:53:48 | 2025-07-14T23:53:48 | https://github.com/pandas-dev/pandas/pull/61858 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61858 | https://github.com/pandas-dev/pandas/pull/61858 | kr1shnasomani | 1 | Enhanced readability of the file's content
- [x] closes #xxxx (Replace xxxx with the GitHub issue number)
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pan... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks but I don't think this improves the readability of this file much so closing"
] |
3,229,553,781 | 61,857 | CI: Add testing for Window ARM | closed | 2025-07-14T17:52:47 | 2025-07-14T17:58:27 | 2025-07-14T17:58:22 | https://github.com/pandas-dev/pandas/pull/61857 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61857 | https://github.com/pandas-dev/pandas/pull/61857 | mroeschke | 1 | We added wheel support for `win_arm64` in https://github.com/pandas-dev/pandas/pull/61463, so we might as well be regularly testing this platform on CI.
Additionally "pins" the runner images we use to test Windows and Mac | [
"CI"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Darn micromamba doesnt support `win_arm64` so I guess this is a non-starter"
] |
3,229,451,904 | 61,856 | BUG: Inconsistent .values NA/NaN | open | 2025-07-14T17:15:04 | 2025-07-30T15:56:17 | null | https://github.com/pandas-dev/pandas/issues/61856 | true | null | null | jbrockmendel | 2 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [x] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"PDEP missing values"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Hi! Is anyone working on this issue? I'd like to take it up if it's available.\n",
"This is not ready to be worked on. We suggest looking for an issue with the \"good first issue\" label"
] |
3,229,434,913 | 61,855 | BUG: If both index and axis are passed to DataFrame.drop, raise a clear error | closed | 2025-07-14T17:08:35 | 2025-07-18T02:18:24 | 2025-07-18T02:18:16 | https://github.com/pandas-dev/pandas/pull/61855 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61855 | https://github.com/pandas-dev/pandas/pull/61855 | khemkaran10 | 5 | - [x] closes #61823 | [
"Bug",
"Error Reporting"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"pre-commit.ci autofix",
"@camriddell I have made the changes.",
"Can @rhshadrach take a look and provide some guidance? If we want to maintain backwards compat. then this is likely the final form of this PR.\r\n\r\nHowever there is a deeper issue that is not present in either (thanks for finding these @khemkar... |
3,228,706,921 | 61,854 | BUG: Reassigning .rolling().mean() returns NaNs (pandas-dev#61841) | closed | 2025-07-14T13:03:22 | 2025-07-14T13:07:11 | 2025-07-14T13:07:11 | https://github.com/pandas-dev/pandas/pull/61854 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61854 | https://github.com/pandas-dev/pandas/pull/61854 | abujabarmubarak | 0 |
This pull request resolves a bug highlighted in issue [[#61841](https://github.com/pandas-dev/pandas/issues/61841)](https://github.com/pandas-dev/pandas/issues/61841), where reassigning the result of `.rolling().mean()` to the same column in a DataFrame results in all-NaN values after the first assignment.
#### ... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,228,508,450 | 61,853 | fix extension type check for ArrowDtype | closed | 2025-07-14T11:58:50 | 2025-07-14T11:59:51 | 2025-07-14T11:59:51 | https://github.com/pandas-dev/pandas/pull/61853 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61853 | https://github.com/pandas-dev/pandas/pull/61853 | rohanjain101 | 0 | - [ ] closes #xxxx (Replace xxxx with the GitHub issue number)
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/con... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,227,554,421 | 61,852 | BUG: Fix .rolling().mean() reassignment returning NaNs (pandas-dev#61841) | closed | 2025-07-14T06:39:11 | 2025-07-25T17:57:46 | 2025-07-25T17:57:46 | https://github.com/pandas-dev/pandas/pull/61852 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61852 | https://github.com/pandas-dev/pandas/pull/61852 | abujabarmubarak | 0 |
This pull request resolves a bug highlighted in issue [[#61841](https://github.com/pandas-dev/pandas/issues/61841)](https://github.com/pandas-dev/pandas/issues/61841), where reassigning the result of `.rolling().mean()` to the same column in a DataFrame results in all-NaN values after the first assignment.
#### 🔜... | [
"Bug",
"Window"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,227,483,722 | 61,851 | BUG: Fix .rolling().mean() reassignment returning NaNs (pandas-dev#61841) | closed | 2025-07-14T06:08:20 | 2025-07-14T16:39:18 | 2025-07-14T16:39:17 | https://github.com/pandas-dev/pandas/pull/61851 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61851 | https://github.com/pandas-dev/pandas/pull/61851 | abujabarmubarak | 1 |
This pull request resolves a bug highlighted in issue [[#61841](https://github.com/pandas-dev/pandas/issues/61841)](https://github.com/pandas-dev/pandas/issues/61841), where reassigning the result of `.rolling().mean()` to the same column in a DataFrame results in all-NaN values after the first assignment.
#### 🔜... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks for the PR, but please contain the changes to one open pull request at a time"
] |
3,227,448,573 | 61,850 | BUG: Fix issue #61841 - .rolling().mean() returns NaNs on reassignment | closed | 2025-07-14T05:50:42 | 2025-07-14T06:25:58 | 2025-07-14T05:54:19 | https://github.com/pandas-dev/pandas/pull/61850 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61850 | https://github.com/pandas-dev/pandas/pull/61850 | abujabarmubarak | 0 |
This pull request fixes **issue #61841**, where reassigning a `.rolling().mean()` result unexpectedly returns a Series of all NaNs, even after copying the DataFrame.
---
### 🐛 Bug Reproduction Example
```python
import pandas as pd
import numpy as np
df = pd.DataFrame({"Close": np.arange(1, 31)})
df = ... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,227,120,464 | 61,849 | Remove incorrect line in Series init docstring | closed | 2025-07-14T02:01:35 | 2025-07-17T03:36:38 | 2025-07-14T15:48:25 | https://github.com/pandas-dev/pandas/pull/61849 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61849 | https://github.com/pandas-dev/pandas/pull/61849 | petern48 | 1 | - [x] closes #61848
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ]... | [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"thanks @petern48 "
] |
3,227,118,813 | 61,848 | DOC: Series.__init__ doc incorrectly says dtype is ignored if data is a Series | closed | 2025-07-14T02:00:43 | 2025-07-14T15:48:26 | 2025-07-14T15:48:26 | https://github.com/pandas-dev/pandas/issues/61848 | true | null | null | petern48 | 0 | ### Pandas version checks
- [x] I have checked that the issue still exists on the latest versions of the docs on `main` [here](https://pandas.pydata.org/docs/dev/)
### Location of the documentation
https://pandas.pydata.org/docs/dev/reference/api/pandas.Series.html
### Documentation problem
```
dtype : str, n... | [
"Docs",
"Series"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,226,691,653 | 61,847 | BUG: Fix .rolling().mean() returning NaNs on reassignment (#61841) | closed | 2025-07-13T17:48:15 | 2025-07-13T18:31:45 | 2025-07-13T18:31:45 | https://github.com/pandas-dev/pandas/pull/61847 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61847 | https://github.com/pandas-dev/pandas/pull/61847 | abujabarmubarak | 0 | ### What does this PR do?
Fixes issue #61841 where `.rolling().mean()` unexpectedly returns all NaNs when the same assignment is executed more than once, even with `.copy()` used on the DataFrame.
---
### Problem
When using:
```python
df = pd.DataFrame({"Close": range(1, 31)})
df = df.copy()
df["SMA20... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,226,644,773 | 61,846 | BUG: Fix .rolling().mean() returning NaNs on reassignment (#61841) | closed | 2025-07-13T16:39:51 | 2025-07-13T17:45:12 | 2025-07-13T17:45:12 | https://github.com/pandas-dev/pandas/pull/61846 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61846 | https://github.com/pandas-dev/pandas/pull/61846 | abujabarmubarak | 0 | ### What does this PR do?
Fixes issue #61841 where `.rolling().mean()` unexpectedly returns all NaNs when the same assignment is executed more than once, even with `.copy()` used on the DataFrame.
---
### Problem
When using:
```python
df["SMA20"] = df["Close"].rolling(20).mean()
df["SMA20"] = df["Close... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,226,557,213 | 61,845 | BUG: Fix rolling().mean() returning NaNs on reassignment (#61841) | closed | 2025-07-13T14:42:18 | 2025-07-14T16:39:10 | 2025-07-14T16:39:10 | https://github.com/pandas-dev/pandas/pull/61845 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61845 | https://github.com/pandas-dev/pandas/pull/61845 | abujabarmubarak | 1 | ### Problem
Fixes issue #61841 — calling `.rolling().mean()` twice on a copied DataFrame was returning all NaNs on the second run.
This happened due to a slicing operation (`[::self.step]`) in `_apply_columnwise`, which broke result alignment when overwriting the same column.
### Solution
Removed the `[:: s... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks for the PR, but please contain the changes to one open pull request at a time"
] |
3,226,437,589 | 61,844 | ENH: Backport free-threading support to 2.3 | open | 2025-07-13T11:45:27 | 2025-07-14T20:35:18 | null | https://github.com/pandas-dev/pandas/issues/61844 | true | null | null | crusaderky | 2 | Follow-up from https://github.com/pandas-dev/pandas/issues/59057
When I import the pandas-2.3.1 wheel from pypi in Python 3.13t, I get
> E RuntimeWarning: The global interpreter lock (GIL) has been enabled to load module 'pandas._libs.pandas_parser', which has not declared that it can run safely without the GIL. To... | [
"Enhancement",
"Closing Candidate",
"Python 3.13"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Assuming #59057 is complete, it would be helpful to understand the set of PRs that would need to be backported to support this. While no strong objection assuming the changes are small, I think I'd still prefer to just release 3.0 which hopefully will not be a long wait.\n\ncc @mroeschke ",
"Yeah I've lost track... |
3,226,430,650 | 61,843 | DOC: Simplify pandas theme footer | closed | 2025-07-13T11:34:18 | 2025-07-14T16:37:16 | 2025-07-14T16:37:15 | https://github.com/pandas-dev/pandas/pull/61843 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61843 | https://github.com/pandas-dev/pandas/pull/61843 | Siryoos | 2 | # 🎯 DOC: Simplify pandas theme footer
## 📝 Description
This pull request refactors the pandas documentation footer by tapping into the built-in templates in **pydata-sphinx-theme** v0.16. The result is a leaner, more maintainable setup with zero visual regressions—science approved!
## 🔧 Changes Made
1. **`do... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"this is AI generated?",
"Thanks for the PR, but we discourage the use of AI generated pull requests so closing"
] |
3,226,180,052 | 61,842 | Create Vix | closed | 2025-07-13T06:20:40 | 2025-07-14T15:46:56 | 2025-07-14T15:46:56 | https://github.com/pandas-dev/pandas/pull/61842 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61842 | https://github.com/pandas-dev/pandas/pull/61842 | vagdale | 1 | Want backtest data Nifty 50 index data rsi
- [x] closes #xxxx (Replace xxxx with the GitHub issue number)
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pan... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"This doesn't belong here."
] |
3,225,929,050 | 61,841 | BUG: .rolling().mean() returns all NaNs on re-execution, despite .copy() use | open | 2025-07-12T23:36:26 | 2025-07-14T20:45:05 | null | https://github.com/pandas-dev/pandas/issues/61841 | true | null | null | DavidZatica | 5 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [x] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug",
"Indexing",
"MultiIndex",
"Window"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"I also faced this issue in Pandas 2.3.1.\n\nEven on the first run, using `.rolling().mean()` on a `.copy()` of the column gives all NaN values.\n\n---\n\n### ✅ Reproducible Code\n\n```python\nimport pandas as pd\nimport yfinance as yf\n\ndata = yf.download(\"AAPL\", start=\"2020-01-01\", end=\"2020-05-01\", auto_a... |
3,225,401,662 | 61,840 | DOC: Add unified code guideline document (#33851) | closed | 2025-07-12T14:07:15 | 2025-07-12T18:33:52 | 2025-07-12T18:33:51 | https://github.com/pandas-dev/pandas/pull/61840 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61840 | https://github.com/pandas-dev/pandas/pull/61840 | abujabarmubarak | 3 | ### Summary
This PR addresses Issue #33851 by adding a new consolidated documentation file named `code_guidelines.md` under `doc/source/development/`. The goal is to unify coding standards and make it easier for new contributors to find all code style rules in one place.
### Key Highlights
- Combines content f... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Hi team 👋,\r\nThis PR addresses issue #33851 by consolidating code style guidelines into one document (`code_guidelines.md`) under `doc/source/development/`. \r\n\r\nAll checks have passed ✅. Please let me know if anything needs to be revised — happy to make changes! Thanks for reviewing 🙏\r\n",
"Hi team 👋,\r... |
3,225,093,081 | 61,839 | DOC: rm excessive backtick | closed | 2025-07-12T09:16:13 | 2025-07-12T20:51:49 | 2025-07-12T18:36:28 | https://github.com/pandas-dev/pandas/pull/61839 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61839 | https://github.com/pandas-dev/pandas/pull/61839 | mattwang44 | 1 | - [ ] ~~closes #xxxx (Replace xxxx with the GitHub issue number)~~ only fix sphinx syntax
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pand... | [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @mattwang44 "
] |
3,224,754,917 | 61,838 | ENH: Include line number and number of fields when read_csv() callable raises ParserWarning | open | 2025-07-12T03:26:27 | 2025-07-24T13:58:57 | null | https://github.com/pandas-dev/pandas/issues/61838 | true | null | null | matthewgottlieb | 2 | ### Feature Type
- [ ] Adding new functionality to pandas
- [x] Changing existing functionality in pandas
- [ ] Removing existing functionality in pandas
### Problem Description
I wish I could use pandas to detect and repair issues in a CSV file, but raise an informative warning when an unrepairable issue is enco... | [
"Enhancement",
"Error Reporting",
"Needs Triage"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Hi @matthewgottlieb ,\nIt seems a method accepts the expected col num and the actual col num when `engine='pyarrow'`, so I think maybe we can do the same thing for `engine='python'` as well.\n\n```python\nimport pandas as pd\nimport warnings\n\ndef on_bad_lines_pyarrow(arg):\n\twarnings.warn(\n\tf'Expected {arg[0]... |
3,224,729,529 | 61,837 | BUG: read_csv() on_bad_lines callable does not raise ParserWarning when index_col is set | open | 2025-07-12T03:01:11 | 2025-07-19T16:40:31 | null | https://github.com/pandas-dev/pandas/issues/61837 | true | null | null | matthewgottlieb | 1 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [ ] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug",
"IO CSV"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"I looked into this and found that the ParserWarning for extra fields returned by a callable in on_bad_lines was only triggered when index_col=None. When index_col was set, the warning was silently skipped, causing silent data loss.\n\nI am not very confident but I tried to fixed the code so the warning is always r... |
3,224,725,538 | 61,836 | DOC: Update README.md to reference issues related to 'good first issue' and 'Docs' properly | closed | 2025-07-12T02:55:59 | 2025-07-12T18:49:43 | 2025-07-12T18:49:35 | https://github.com/pandas-dev/pandas/pull/61836 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61836 | https://github.com/pandas-dev/pandas/pull/61836 | sivasweatha | 1 | - [x] closes #61835 (Replace xxxx with the GitHub issue number)
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/co... | [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @sivasweatha "
] |
3,224,725,304 | 61,835 | DOC: README.md link for issues specified for Docs and good first issue doesn't reference properly | closed | 2025-07-12T02:55:35 | 2025-07-12T18:49:36 | 2025-07-12T18:49:36 | https://github.com/pandas-dev/pandas/issues/61835 | true | null | null | sivasweatha | 1 | ### Pandas version checks
- [x] I have checked that the issue still exists on the latest versions of the docs on `main` [here](https://pandas.pydata.org/docs/dev/)
### Location of the documentation
https://github.com/pandas-dev/pandas?tab=readme-ov-file#contributing-to-pandas
### Documentation problem
In the READ... | [
"Docs",
"Needs Triage"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Fixed this issue with #61836."
] |
3,224,532,712 | 61,834 | ENH: error message context. | open | 2025-07-12T00:11:06 | 2025-07-30T16:41:50 | null | https://github.com/pandas-dev/pandas/issues/61834 | true | null | null | hunterhogan | 2 | ### Feature Type
- [ ] Adding new functionality to pandas
- [x] Changing existing functionality in pandas
- [ ] Removing existing functionality in pandas
### Problem Description
I wish I had more information when troubleshooting exceptions.
```python
Traceback (most recent call last):
File "c:\apps\astToolFact... | [
"Enhancement",
"Error Reporting",
"Needs Triage"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Created a PR that will, hopefully, close this issue. Please review and suggest",
"I greatly appreciate your work on this!"
] |
3,223,459,674 | 61,833 | DOC: Clarify str.cat output for Index object (GH35556) | closed | 2025-07-11T16:10:36 | 2025-07-28T17:23:17 | 2025-07-28T17:23:17 | https://github.com/pandas-dev/pandas/pull/61833 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61833 | https://github.com/pandas-dev/pandas/pull/61833 | anvivats | 1 | - [x] closes #35556
- [x] Tests added and passed — *N/A (doc-only change)*
- [x] All code checks passed — *pre-commit and CI should pass*
- [x] Added type annotations — *N/A (no new code added)*
- [x] Added an entry in the latest whatsnew — *N/A (doc-only update)*
### Summary of Changes
This PR improves the d... | [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks for the pull request, but it appears to have gone stale. If interested in continuing, please merge in the main branch, address any review comments and/or failing tests, and we can reopen."
] |
3,223,192,067 | 61,832 | REF: separate out helpers in libparser | closed | 2025-07-11T14:51:21 | 2025-07-11T22:34:06 | 2025-07-11T16:32:39 | https://github.com/pandas-dev/pandas/pull/61832 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61832 | https://github.com/pandas-dev/pandas/pull/61832 | jbrockmendel | 1 | Besides general code hygiene, I'm trying to isolate parts of the code that could be parallelized in a free-threading world xref #61825 | [
"IO CSV"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @jbrockmendel "
] |
3,222,315,548 | 61,831 | BUG: Intersection of Pandas Index Object is not working properly | closed | 2025-07-11T09:57:14 | 2025-07-11T15:41:22 | 2025-07-11T15:41:22 | https://github.com/pandas-dev/pandas/issues/61831 | true | null | null | Abhinav2615 | 1 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [x] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug",
"Needs Triage"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"`&` stopped being an intersection a long time ago. It is the `__and__` operator, the same as for Series/DataFrame. Try `indA.intersection(indB)`."
] |
3,221,370,251 | 61,830 | TST: Fix `test_mask_stringdtype` | closed | 2025-07-11T03:33:52 | 2025-07-11T16:35:53 | 2025-07-11T16:35:45 | https://github.com/pandas-dev/pandas/pull/61830 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61830 | https://github.com/pandas-dev/pandas/pull/61830 | arthurlw | 1 | - [x] closes #61824
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ]... | [
"Testing"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks again @arthurlw "
] |
3,221,165,163 | 61,829 | ENH: Add a function like PYQT signal | closed | 2025-07-11T01:25:12 | 2025-08-05T16:19:10 | 2025-08-05T16:19:10 | https://github.com/pandas-dev/pandas/issues/61829 | true | null | null | an-unimportant-person | 4 | ### Feature Type
- [x] Adding new functionality to pandas
- [ ] Changing existing functionality in pandas
- [ ] Removing existing functionality in pandas
### Problem Description
I hope this function can use to keep two or more dataframe same like PyQt View and Model (if I revise model view will change )
### Feat... | [
"Enhancement",
"Needs Triage",
"Closing Candidate"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Quick explanation for those of us who don’t know what pyqt signal is?",
"it is a characteristic that content in widget will changed when model changed . that was powered by pyqtsignal ,when model changed ,model will emit \"DataChanged\" signal to update the data in widget(view).",
"I don't think that belongs i... |
3,220,921,101 | 61,828 | BUG: Dataframe arithmatic operators don't work with Series using fill_value | open | 2025-07-10T22:54:01 | 2025-08-23T17:29:40 | null | https://github.com/pandas-dev/pandas/pull/61828 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61828 | https://github.com/pandas-dev/pandas/pull/61828 | eicchen | 10 | - [x] closes #61581
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [x... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Im closing the PR for now until the additional fixes for EA are deployed",
"Reopened to talk about fixes for this specific issue before I get sidetracked by 1D operations again (ignore all the failed checks for now)",
"The appropriate fix is going to be in _maybe_align_series_as_frame",
"> The appropriate fi... |
3,220,718,791 | 61,827 | DOC: Correct error message in AbstractMethodError for methodtype argument | closed | 2025-07-10T21:10:11 | 2025-07-12T07:33:27 | 2025-07-11T22:50:19 | https://github.com/pandas-dev/pandas/pull/61827 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61827 | https://github.com/pandas-dev/pandas/pull/61827 | Maaz-319 | 3 | Fixing an error message in the AbstractMethodError class found in pandas/errors/__init__.py.
Currently:
raise ValueError(
f"methodtype must be one of {methodtype}, got {types} instead."
)
Here, {methodtype} and {types} are swapped.
This means if you called this error with methodtype="foo", the message would r... | [
"Error Reporting"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"pre-commit.ci autofix",
"Thanks @Maaz-319 ",
"> Thanks @Maaz-319 \n\nGlad to contribute @mroeschke "
] |
3,220,114,056 | 61,826 | TST: enable 2D tests for MaskedArrays, fix+test shift | closed | 2025-07-10T17:21:01 | 2025-07-11T22:33:53 | 2025-07-11T16:41:58 | https://github.com/pandas-dev/pandas/pull/61826 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61826 | https://github.com/pandas-dev/pandas/pull/61826 | jbrockmendel | 1 | - [ ] closes #xxxx (Replace xxxx with the GitHub issue number)
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/con... | [
"Testing",
"NA - MaskedArrays"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @jbrockmendel "
] |
3,219,990,761 | 61,825 | PERF: Brainstorming read_csv perf improvements | open | 2025-07-10T16:32:15 | 2025-07-11T14:11:21 | null | https://github.com/pandas-dev/pandas/issues/61825 | true | null | null | jbrockmendel | 3 | - [ ] With free-threading, could _convert_column_data be called in parallel for each column?
- [ ] (free-threading) For large files, split into chunks and parse in parallel, then concat?
- [ ] In a pyarrow-always-available world, could `_string_box_utf8` allocate a buffer+mask rather than ndarray[object]?
- [ ] #17743... | [
"Performance",
"IO CSV",
"Needs Discussion"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Is it possible to prefilter? @jbrockmendel ",
"Can you describe what you have in mind?",
"@jbrockmendel I mean do a filter on the rows while reading the csv, instead of returning the entire CSV. I'm thinking of what happens with parquet, where a user can return a subset of the data, filtered based on partition... |
3,219,391,518 | 61,824 | BUG: `mask` in `test_mask_stringdtype` would always return the same result regardless of `cond` | closed | 2025-07-10T13:32:51 | 2025-07-11T16:35:47 | 2025-07-11T16:35:47 | https://github.com/pandas-dev/pandas/issues/61824 | true | null | null | sanggon6107 | 1 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [x] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug",
"Testing"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Confirmed on main. PRs and investigations are welcome\n\nThanks for raising this!"
] |
3,218,613,276 | 61,823 | BUG: drop doesn't recognise MultiIndexes | closed | 2025-07-10T09:39:27 | 2025-07-18T02:18:17 | 2025-07-18T02:18:17 | https://github.com/pandas-dev/pandas/issues/61823 | true | null | null | pratt-fds | 7 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [ ] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Your function call specification is incorrect here, the arguments `index` and `columns` are supposed to be mutually exclusive from the use of `labels` & `axis` (confusing I know).\n\n```python\nfoo.drop(index='b', level=1, axis=1)\n```\n\nBy specifying `index='b'` pandas is only examining the row index for a Multi... |
3,218,091,232 | 61,822 | TST: Adding tests for validating DataFrame.__setitem__ and .loc behavior | closed | 2025-07-10T06:33:10 | 2025-08-01T05:32:39 | 2025-08-01T05:32:38 | https://github.com/pandas-dev/pandas/pull/61822 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61822 | https://github.com/pandas-dev/pandas/pull/61822 | niruta25 | 3 | - [ ] closes #xxxx (Replace xxxx with the GitHub issue number)
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/con... | [
"Testing"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"@WillAyd Since I have you, last follow up from the https://github.com/pandas-dev/pandas/pull/61804, Should we keep these tests? \r\n\r\nLast convo on this issue regarding tests was here: https://github.com/pandas-dev/pandas/pull/61804#discussion_r2193379353",
"I appreciate adding tests but I think this PR is sup... |
3,217,521,002 | 61,821 | DOC: Update link to pytz documentation | closed | 2025-07-10T00:46:51 | 2025-07-11T16:21:36 | 2025-07-11T16:21:30 | https://github.com/pandas-dev/pandas/pull/61821 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61821 | https://github.com/pandas-dev/pandas/pull/61821 | star1327p | 2 | Pytz documentation:
https://pypi.org/project/pytz/
The original link does not work:
http://pytz.sourceforge.net/index.html
- [ ] closes #xxxx (Replace xxxx with the GitHub issue number)
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests... | [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"@star1327p Can I take this ?",
"Thanks @star1327p "
] |
3,216,771,450 | 61,820 | DOC: Clarify broadcasting behavior when using lists in DataFrame arithmetic (GH18857) | open | 2025-07-09T18:21:25 | 2025-08-14T22:41:09 | null | https://github.com/pandas-dev/pandas/pull/61820 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61820 | https://github.com/pandas-dev/pandas/pull/61820 | Shashwat1001 | 1 | - Clarifies the behavior when using Python lists in arithmetic operations with DataFrames.
- Adds an example in `dsintro.rst` to show how adding a list returns a Series of arrays.
- Adds a note in `basics.rst` to explain that lists are not broadcasted element-wise, unlike NumPy arrays or Series.
- Fixes #18857.
| [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"@jbrockmendel Can you please help me merge this PR. I have made the changes."
] |
3,216,509,873 | 61,819 | BUG: Series created from pre-2.1 legacy pickles lose their names during .copy operations | open | 2025-07-09T16:28:53 | 2025-07-13T23:57:01 | null | https://github.com/pandas-dev/pandas/issues/61819 | true | null | null | Liam3851 | 2 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [x] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug",
"Needs Discussion",
"IO Pickle"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks for the report. From https://pandas.pydata.org/pandas-docs/dev/user_guide/io.html#pickling:\n\n> [read_pickle()](https://pandas.pydata.org/pandas-docs/dev/reference/api/pandas.read_pickle.html#pandas.read_pickle) is only guaranteed backwards compatible back to a few minor release.\n\nSo this indeed is not a... |
3,215,487,867 | 61,818 | Improved installation instruction in docs for clarity | closed | 2025-07-09T10:51:03 | 2025-07-09T14:37:35 | 2025-07-09T14:37:34 | https://github.com/pandas-dev/pandas/pull/61818 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61818 | https://github.com/pandas-dev/pandas/pull/61818 | lalitchoudhary81097 | 1 | Made a small improvement in the installation section to improve clarity for new users.
First open-source contribution
| [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"@lalitchoudhary81097 I'm glad you're interested in open source. Fixes to spelling or grammar are welcome, but please keep in mind that a volunteer needs to take time to review your suggestions."
] |
3,214,392,590 | 61,817 | To develop a machine learning model that accurately predicts house prices based on
various features such as location, size, number of bedrooms, and other relevant factors. | closed | 2025-07-09T03:51:38 | 2025-07-09T16:03:02 | 2025-07-09T16:03:02 | https://github.com/pandas-dev/pandas/issues/61817 | true | null | null | Kavinsanjai57 | 1 | null | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Hi, please use the issue template when creating an issue. From the title, I don't think this is something the pandas team can help with unless you have something more concrete.\n\nIf you do, feel free to open another issue!"
] |
3,214,346,286 | 61,816 | BUG: DataFrame.aggregate to preserve extension dtypes with callable functions | open | 2025-07-09T03:15:42 | 2025-08-22T00:08:11 | null | https://github.com/pandas-dev/pandas/pull/61816 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61816 | https://github.com/pandas-dev/pandas/pull/61816 | AdrianoCLeao | 3 |
- [x] closes #61812
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
-... | [
"Bug",
"Stale",
"Arrow",
"pyarrow dtype retention"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Should I add something to the doc/source/whatsnew/vX.X.X.rst file?",
"I'll handle the failed build checks tomorrow",
"This pull request is stale because it has been open for thirty days with no activity. Please [update](https://pandas.pydata.org/pandas-docs/stable/development/contributing.html#updating-your-pu... |
3,213,602,334 | 61,815 | DOC: Add Raises section to pd.to_numeric docstring | closed | 2025-07-08T19:44:19 | 2025-07-16T16:30:30 | 2025-07-16T16:30:29 | https://github.com/pandas-dev/pandas/pull/61815 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61815 | https://github.com/pandas-dev/pandas/pull/61815 | renegade620 | 1 | - [x ] closes #xxxx (Replace xxxx with the GitHub issue number)
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/c... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks for the pull request, but this issue has been addressed by https://github.com/pandas-dev/pandas/pull/61868 so closing. Happy to have contributions towards any other issue labeled `good first issue`"
] |
3,213,566,302 | 61,814 | CI: Remove PyPy references in CI testing | closed | 2025-07-08T19:27:53 | 2025-07-09T22:43:51 | 2025-07-09T21:47:42 | https://github.com/pandas-dev/pandas/pull/61814 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61814 | https://github.com/pandas-dev/pandas/pull/61814 | mroeschke | 1 | We haven't had reliable PyPy testing in many years now and no one to champion supporting this platform. We only have 1 job that builds pandas with PyPy on Python 3.9 (already dropped). It's made more difficult that conda-forge no longer supports PyPy either, https://conda-forge.org/news/2024/08/14/sunsetting-pypy/
... | [
"CI"
] | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @mroeschke "
] |
3,212,782,838 | 61,813 | ENH: Add Polars engine to read_csv | open | 2025-07-08T14:31:02 | 2025-07-24T22:47:43 | null | https://github.com/pandas-dev/pandas/issues/61813 | true | null | null | datapythonista | 11 | Since we won't get it for free via #61642, is would be good to add a Polars engine manually, so pandas users can benefit from state-of-the-art speed while readings CSVs.
@pandas-dev/pandas-core any objection? | [
"IO CSV",
"good first issue"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"1. How does it compare performance wise to the PyArrow csv parser?\n2. Compared to the PyArrow csv reader, I'm less eager to add a Polars engine since it already has a `to_pandas` method and pandas `read_csv` doesn't have a use for the intermediate Polars data structures unlike PyArrow (i.e. `ArrowExtensionArray` ... |
3,212,422,515 | 61,812 | BUG: Dataframe.aggregate drops pyarrow backend for lambda aggregation functions | open | 2025-07-08T12:47:25 | 2025-07-29T16:01:30 | null | https://github.com/pandas-dev/pandas/issues/61812 | true | null | null | flori-ko | 4 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [x] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug",
"Arrow",
"pyarrow dtype retention"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"I've taken some time to verify it locally on my setup (pandas 2.3.1, pyarrow 20.0.0, Python 3.10.12). \nI was able to test the return in some ways:\n\n- df.aggregate(lambda x: x.mean()) → `float64` (loses pyarrow dtype)\n- df.aggregate(\"mean\") → `double[pyarrow]` (preserves pyarrow dtype)\n- df.aggregate(np.m... |
3,211,617,510 | 61,811 | DOC: Lacking information on error type raised by pd.to_numeric | closed | 2025-07-08T08:46:42 | 2025-07-16T16:29:48 | 2025-07-16T16:29:48 | https://github.com/pandas-dev/pandas/issues/61811 | true | null | null | ericludvigs | 1 | ### Pandas version checks
- [x] I have checked that the issue still exists on the latest versions of the docs on `main` [here](https://pandas.pydata.org/docs/dev/)
### Location of the documentation
https://pandas.pydata.org/docs/reference/api/pandas.to_numeric.html
### Documentation problem
There is no "Raises" s... | [
"Docs",
"Needs Triage"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Hi, I'd like to pick this up as my first open source contribution. "
] |
3,211,492,270 | 61,810 | DOC: update release process maintainer guide | closed | 2025-07-08T08:06:45 | 2025-07-22T09:35:05 | 2025-07-22T09:34:20 | https://github.com/pandas-dev/pandas/pull/61810 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61810 | https://github.com/pandas-dev/pandas/pull/61810 | jorisvandenbossche | 2 | A small things I noticed that could use some update or clarification while releasing 2.3.1.
cc @mroeschke can you check that this confirms with your experience when releasing 2.3.0? | [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"@jorisvandenbossche one thing that I used to do during pre-release is ensure that the release notes between the backport and the main branch were in sync.\r\n\r\nDiscrepancies can arise if backports are missed or merge conflicts on the backport were perhaps not resolved correctly, so this used to be a beneficial c... |
3,210,844,817 | 61,809 | BUG: Pandas Series with Xarray slow print time. | open | 2025-07-08T02:57:42 | 2025-07-23T23:37:47 | null | https://github.com/pandas-dev/pandas/issues/61809 | true | null | null | chaoyupeng | 1 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [x] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug",
"Performance",
"Output-Formatting",
"Needs Discussion",
"Nested Data"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"From a surface-level investigation, it seems the difference is caused because when printing a Series, pandas forces `repr` to be called on each element, whereas I assume extracting the data first and printing the result requires calling `repr` only once. In this case, the difference in performance is substantial b... |
3,210,425,973 | 61,808 | CLN: remove doctest-ignores | closed | 2025-07-07T22:39:49 | 2025-07-08T15:01:53 | 2025-07-08T15:01:48 | https://github.com/pandas-dev/pandas/pull/61808 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61808 | https://github.com/pandas-dev/pandas/pull/61808 | jbrockmendel | 0 | Found this old branch, no idea if past-me was right about these being removable. | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,210,192,989 | 61,807 | BUG: union of MultiIndex throws exception for datetime and pd.Timestamp with identical values | open | 2025-07-07T20:36:01 | 2025-07-28T07:56:03 | null | https://github.com/pandas-dev/pandas/issues/61807 | true | null | null | jwg4 | 4 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [ ] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug",
"Datetime",
"Dtype Conversions",
"Index"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"This apparent bug also affects another basic operation which could be expected to succeed, `DataFrame.combine_first` when using frames with MultiIndex as described above:\n\n```\nfrom datetime import date\nimport pandas as pd\n\ndf_a = pd.DataFrame(\n [\n (date(2001, 1, 1), \"foo\", 11),\n ],\n col... |
3,210,131,899 | 61,806 | DEPS: Bump NumPy and tzdata | closed | 2025-07-07T20:11:43 | 2025-07-08T15:44:48 | 2025-07-08T15:44:42 | https://github.com/pandas-dev/pandas/pull/61806 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61806 | https://github.com/pandas-dev/pandas/pull/61806 | mroeschke | 0 | These dependencies should have been released ~2 years ago by the time we release pandas 3.0
closes https://github.com/pandas-dev/pandas/issues/61588 | [
"Dependencies"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,209,849,864 | 61,805 | DOC: Improve clarity of GroupBy introduction sentence | closed | 2025-07-07T18:03:11 | 2025-07-15T22:25:13 | 2025-07-15T22:25:12 | https://github.com/pandas-dev/pandas/pull/61805 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61805 | https://github.com/pandas-dev/pandas/pull/61805 | Vedant-Kadam-Noobie | 1 | This small change clarifies the introductory sentence of the GroupBy user guide, as recommended for documentation improvements. It makes the definition of the "group by" process more direct and easier for new users to understand.
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/co... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"@Vedant-Kadam-Noobie thanks for the PR but simon and I prefer the existing phrasing."
] |
3,209,770,110 | 61,804 | DOC: Improve documentation for DataFrame.__setitem__ and .loc assignment from Series | closed | 2025-07-07T17:27:16 | 2025-08-01T15:31:10 | 2025-08-01T15:31:04 | https://github.com/pandas-dev/pandas/pull/61804 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61804 | https://github.com/pandas-dev/pandas/pull/61804 | niruta25 | 4 | - [x] closes #61662
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ]... | [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"@WillAyd Any thought on this resolution? ",
"Thanks @niruta25 for the PR\r\n\r\n> * Expanding the user guide with a dedicated section on Series assignment and index alignment\r\n\r\nI see that \"align\" is found 16 times when searching \"Intro to data structures\" section of the docs. This chapter is only preced... |
3,209,648,127 | 61,803 | Backport PR #61794 on branch 2.3.x (DOC: prepare 2.3.1 whatsnew notes for release) | closed | 2025-07-07T16:36:39 | 2025-07-07T17:09:22 | 2025-07-07T17:09:22 | https://github.com/pandas-dev/pandas/pull/61803 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61803 | https://github.com/pandas-dev/pandas/pull/61803 | meeseeksmachine | 0 | Backport PR #61794: DOC: prepare 2.3.1 whatsnew notes for release | [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,209,627,593 | 61,802 | [pre-commit.ci] pre-commit autoupdate | closed | 2025-07-07T16:30:08 | 2025-07-07T18:09:18 | 2025-07-07T18:09:15 | https://github.com/pandas-dev/pandas/pull/61802 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61802 | https://github.com/pandas-dev/pandas/pull/61802 | pre-commit-ci[bot] | 0 | <!--pre-commit.ci start-->
updates:
- [github.com/astral-sh/ruff-pre-commit: v0.11.12 → v0.12.2](https://github.com/astral-sh/ruff-pre-commit/compare/v0.11.12...v0.12.2)
- [github.com/MarcoGorelli/cython-lint: v0.16.6 → v0.16.7](https://github.com/MarcoGorelli/cython-lint/compare/v0.16.6...v0.16.7)
- [github.com/pre-co... | [
"Code Style"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,209,113,779 | 61,801 | [backport 2.3.x] TST: update expected dtype for sum of decimals with pyarrow 21+ (#61799) | closed | 2025-07-07T13:46:21 | 2025-07-07T14:56:26 | 2025-07-07T14:56:23 | https://github.com/pandas-dev/pandas/pull/61801 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61801 | https://github.com/pandas-dev/pandas/pull/61801 | jorisvandenbossche | 0 | Backport of #61799 | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,209,017,025 | 61,800 | [backport 2.3.x] BUG[string]: incorrect index downcast in DataFrame.join (#61771) | closed | 2025-07-07T13:19:28 | 2025-07-07T16:35:52 | 2025-07-07T15:40:37 | https://github.com/pandas-dev/pandas/pull/61800 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61800 | https://github.com/pandas-dev/pandas/pull/61800 | jorisvandenbossche | 0 | Backport of #61771 | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,208,910,996 | 61,799 | TST: update expected dtype for sum of decimals with pyarrow 21+ | closed | 2025-07-07T12:50:39 | 2025-07-07T13:46:41 | 2025-07-07T13:41:24 | https://github.com/pandas-dev/pandas/pull/61799 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61799 | https://github.com/pandas-dev/pandas/pull/61799 | jorisvandenbossche | 3 | This should fix the failure we started having for the pyarrow nightly build (behaviour change in https://github.com/apache/arrow/pull/44184 to increase the precision of the resulting decimal for sum) | [
"Testing",
"Arrow"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Apologies for going quickly here, but going to merge this to have green CI on 2.3.x for releasing",
"Owee, I'm MrMeeseeks, Look at me.\n\nThere seem to be a conflict, please backport manually. Here are approximate instructions:\n\n1. Checkout backport branch and update it.\n\n```\ngit checkout 2.3.x\ngit pull\n`... |
3,208,792,361 | 61,798 | Backport PR #61795 on branch 2.3.x (DOC: add section about upcoming pandas 3.0 changes (string dtype, CoW) to 2.3 whatsnew notes) | closed | 2025-07-07T12:16:00 | 2025-07-07T13:25:28 | 2025-07-07T13:25:28 | https://github.com/pandas-dev/pandas/pull/61798 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61798 | https://github.com/pandas-dev/pandas/pull/61798 | meeseeksmachine | 0 | Backport PR #61795: DOC: add section about upcoming pandas 3.0 changes (string dtype, CoW) to 2.3 whatsnew notes | [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,208,572,203 | 61,797 | Backport PR #61705 on branch 2.3.x (DOC: add pandas 3.0 migration guide for the string dtype) | closed | 2025-07-07T11:09:03 | 2025-07-07T11:37:31 | 2025-07-07T11:37:30 | https://github.com/pandas-dev/pandas/pull/61797 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61797 | https://github.com/pandas-dev/pandas/pull/61797 | meeseeksmachine | 0 | Backport PR #61705: DOC: add pandas 3.0 migration guide for the string dtype | [
"Docs",
"Strings"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,208,491,765 | 61,796 | Bump pypa/cibuildwheel from 2.23.3 to 3.0.1 | closed | 2025-07-07T10:46:14 | 2025-07-28T12:59:31 | 2025-07-28T12:59:29 | https://github.com/pandas-dev/pandas/pull/61796 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61796 | https://github.com/pandas-dev/pandas/pull/61796 | dependabot[bot] | 1 | Bumps [pypa/cibuildwheel](https://github.com/pypa/cibuildwheel) from 2.23.3 to 3.0.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/pypa/cibuildwheel/releases">pypa/cibuildwheel's releases</a>.</em></p>
<blockquote>
<h2>v3.0.1</h2>
<ul>
<li>🛠 Updates CPython 3.14 prerelease... | [
"Build",
"CI",
"Dependencies"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Superseded by #61981."
] |
3,208,273,381 | 61,795 | DOC: add section about upcoming pandas 3.0 changes (string dtype, CoW) to 2.3 whatsnew notes | closed | 2025-07-07T09:43:16 | 2025-07-07T12:15:57 | 2025-07-07T12:15:54 | https://github.com/pandas-dev/pandas/pull/61795 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61795 | https://github.com/pandas-dev/pandas/pull/61795 | jorisvandenbossche | 7 | This is largely copied from the equivalent notes in the 2.2 release notes at https://pandas.pydata.org/pandas-docs/stable/whatsnew/v2.2.0.html#upcoming-changes-in-pandas-3-0, with some updates (and some new content copied from WIP 3.0 release notes in https://github.com/pandas-dev/pandas/pull/61724) | [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"/preview",
"LGTM @jorisvandenbossche is the \"TODO add link to migration guide\" going to be done here or a follow up?",
"There is a mix of `code-block:: python` and `code-block:: ipython`. Intentional?",
"> LGTM @jorisvandenbossche is the \"TODO add link to migration guide\" going to be done here or a follo... |
3,208,152,643 | 61,794 | DOC: prepare 2.3.1 whatsnew notes for release | closed | 2025-07-07T09:03:14 | 2025-07-07T16:36:06 | 2025-07-07T16:36:05 | https://github.com/pandas-dev/pandas/pull/61794 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61794 | https://github.com/pandas-dev/pandas/pull/61794 | jorisvandenbossche | 9 | Prepping for doing a 2.3.1 release today, xref https://github.com/pandas-dev/pandas/issues/61590 | [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"@jorisvandenbossche for the \"Comparisons between different string dtypes\" is there an issue ref?\r\n\r\nI don't get why:\r\n\r\n> When ``pd.StringDtype(\"pyarrow\", na_value=pd.NA)`` is compared against any other string dtype, the result will always be ``boolean[pyarrow]``.\r\n\r\nsince when did we start mixing ... |
3,207,901,022 | 61,793 | Backport PR #61770 on branch 2.3.x (BUG: Fix unpickling of string dtypes of legacy pandas versions) | closed | 2025-07-07T07:41:47 | 2025-07-07T13:14:39 | 2025-07-07T13:14:39 | https://github.com/pandas-dev/pandas/pull/61793 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61793 | https://github.com/pandas-dev/pandas/pull/61793 | meeseeksmachine | 1 | Backport PR #61770: BUG: Fix unpickling of string dtypes of legacy pandas versions | [
"Bug",
"Strings",
"IO Pickle"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"I am adding an ignore for a new numpy deprecation warning. Although it also happens to occur in a pickle test, it is not actually related to the changes in this PR. It just started happening now because the linked numpy PR was merged a few days ago (the same failures can be seen on the 2.3.x branch). \r\nAnd it is... |
3,207,827,049 | 61,792 | TST: assert reading of legacy pickles against current data | open | 2025-07-07T07:15:47 | 2025-08-10T00:10:01 | null | https://github.com/pandas-dev/pandas/pull/61792 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61792 | https://github.com/pandas-dev/pandas/pull/61792 | jorisvandenbossche | 2 | While reviewing https://github.com/pandas-dev/pandas/pull/61770, I noticed that we didn't actually compare the read pickle data to some ground truth expected value, but just to itself (we were essentially doing `assert_equal(result, result)` ..), due to some accidental change in a clean-up many years ago in https://git... | [
"Testing",
"IO Pickle",
"Stale"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"can you merge main and see if the pyarrow decimal issue resolves itself?",
"This pull request is stale because it has been open for thirty days with no activity. Please [update](https://pandas.pydata.org/pandas-docs/stable/development/contributing.html#updating-your-pull-request) and respond to this comment if y... |
3,207,503,620 | 61,791 | DOC: Improve text color in dark mode for tutorial navigation buttons | closed | 2025-07-07T04:28:05 | 2025-07-07T20:56:41 | 2025-07-07T13:15:53 | https://github.com/pandas-dev/pandas/issues/61791 | true | null | null | yuting1008 | 3 | ### Pandas version checks
- [x] I have checked that the issue still exists on the latest versions of the docs on `main` [here](https://pandas.pydata.org/docs/dev/)
### Location of the documentation
https://pandas.pydata.org/docs/getting_started/index.html#intro-to-pandas
### Documentation problem
In dark mode, th... | [
"Docs",
"Duplicate Report",
"Web",
"Needs Triage"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"If possible, I would like to take this issue myself. I'm new to open source, please let me know if there is any suggestion or guidance!",
"@yuting1008 Thanks for raising the issue. This appears to be a duplicate of https://github.com/pandas-dev/pandas/issues/60041 and https://github.com/pandas-dev/pandas/issues/... |
3,207,074,435 | 61,790 | DOC: Add link to WebGL in pandas ecosystem | closed | 2025-07-06T21:57:00 | 2025-07-07T16:21:20 | 2025-07-07T16:21:14 | https://github.com/pandas-dev/pandas/pull/61790 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61790 | https://github.com/pandas-dev/pandas/pull/61790 | star1327p | 1 | Add link to WebGL in pandas ecosystem.
https://www.khronos.org/webgl/
- [ ] closes #xxxx (Replace xxxx with the GitHub issue number)
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [cod... | [
"Docs"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @star1327p "
] |
3,206,317,537 | 61,789 | CLN: remove and udpate for outdated _item_cache | closed | 2025-07-06T09:01:28 | 2025-07-07T16:29:24 | 2025-07-07T16:29:16 | https://github.com/pandas-dev/pandas/pull/61789 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61789 | https://github.com/pandas-dev/pandas/pull/61789 | chilin0525 | 1 | - [x] closes #61746
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ... | [
"Testing"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @chilin0525 "
] |
3,205,751,577 | 61,788 | BUG: read_excel() converts the string "None" in an Excel file to "NaN" | closed | 2025-07-05T22:56:52 | 2025-07-08T22:06:33 | 2025-07-08T22:06:33 | https://github.com/pandas-dev/pandas/issues/61788 | true | null | null | jmcnamara | 6 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [ ] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug",
"IO Excel",
"Closing Candidate"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"I can look into this",
"Haven't investigated, but it's likely due to the `na_values` / `keep_default_na` parameters of `read_excel`. I'd try with setting `keep_default_na=False` ",
"Looks like that is the issue:\n\n\n```\nkeep_default_na : bool, default True\n Whether or not to include the default NaN value... |
3,205,656,770 | 61,787 | DOCS: Add detailed Windows build instructions | closed | 2025-07-05T21:33:33 | 2025-07-05T21:33:47 | 2025-07-05T21:33:47 | https://github.com/pandas-dev/pandas/pull/61787 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61787 | https://github.com/pandas-dev/pandas/pull/61787 | TheGuruCo | 0 | - [ ] closes #xxxx (Replace xxxx with the GitHub issue number)
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/con... | [] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [] |
3,205,636,284 | 61,786 | PERF: avoid object-dtype path in ArrowEA._explode | closed | 2025-07-05T21:19:41 | 2025-07-07T16:47:04 | 2025-07-07T16:39:58 | https://github.com/pandas-dev/pandas/pull/61786 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61786 | https://github.com/pandas-dev/pandas/pull/61786 | jbrockmendel | 1 | Identified in #61732 | [
"Arrow"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @jbrockmendel "
] |
3,205,623,246 | 61,785 | REF: remove unreachable, stronger typing in parsers.pyx | closed | 2025-07-05T21:08:44 | 2025-07-07T17:31:36 | 2025-07-07T17:09:59 | https://github.com/pandas-dev/pandas/pull/61785 | true | https://api.github.com/repos/pandas-dev/pandas/pulls/61785 | https://github.com/pandas-dev/pandas/pull/61785 | jbrockmendel | 1 | - [ ] closes #xxxx (Replace xxxx with the GitHub issue number)
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/con... | [
"IO CSV"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @jbrockmendel "
] |
3,205,501,535 | 61,784 | ENH: Add Coefficient of Variation to DataFrame.describe() | closed | 2025-07-05T19:51:00 | 2025-07-07T21:26:48 | 2025-07-07T21:26:48 | https://github.com/pandas-dev/pandas/issues/61784 | true | null | null | ffaa1234 | 4 | ### Feature Type
- [x] Adding new functionality to pandas
- [ ] Changing existing functionality in pandas
- [ ] Removing existing functionality in pandas
### Problem Description
The `DataFrame.describe()` method includes standard deviation (`std`), but its significance is hard to interpret without context, as it ... | [
"Enhancement",
"Closing Candidate"
] | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks for the request. This is similar to https://github.com/pandas-dev/pandas/issues/59897, we receive various requests to rows to `DataFrame.describe`. If we were to add them, `describe` would become overloaded and noisy. I'm opposed here. \n\nAs the OP demonstrates, pandas makes it simple to add such a row alr... |
3,205,193,985 | 61,783 | PERF: Unnecessary string interning in read_csv? | closed | 2025-07-05T16:26:49 | 2025-07-08T14:52:42 | 2025-07-08T14:52:42 | https://github.com/pandas-dev/pandas/issues/61783 | true | null | null | jbrockmendel | 2 | Going through parsers.pyx, particularly _string_box_utf8, I'm trying to figure out what the point of the hashtable checks are:
```
k = kh_get_strbox(table, word)
# in the hash table
if k != table.n_buckets:
# this increments the refcount, but need to test
pyval = <objec... | [
"Performance",
"Needs Triage"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Maybe for the case where you have a string column with repeated values? In that case the above, keeping a hashtable of all encountered values, might make it faster(?) or at least reduce memory.\n\nThe arrow->python conversion in pyarrow has a similar option, `deduplicate_objects` (https://arrow.apache.org/docs/pyt... |
3,204,915,032 | 61,782 | BUG: Errors using pyarrow datetime types on windows | open | 2025-07-05T13:02:02 | 2025-07-11T06:31:26 | null | https://github.com/pandas-dev/pandas/issues/61782 | true | null | null | Liam3851 | 1 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [x] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug",
"Docs",
"Datetime",
"Windows",
"Upstream issue",
"Arrow"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"take\n"
] |
3,203,207,683 | 61,781 | DOC: Typo within `Series.mask()` docs - alignment is done between self and cond, not cond and other | open | 2025-07-04T16:06:29 | 2025-07-14T13:33:45 | null | https://github.com/pandas-dev/pandas/issues/61781 | true | null | null | nickodell | 2 | ### Pandas version checks
- [x] I have checked that the issue still exists on the latest versions of the docs on `main` [here](https://pandas.pydata.org/docs/dev/)
### Location of the documentation
https://pandas.pydata.org/docs/reference/api/pandas.Series.mask.html#pandas.Series.mask
Similar issues exist for Data... | [
"Docs",
"Needs Triage"
] | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Thanks @nickodell I believe a PR suffices for this. Thoughts @rhshadrach @jbrockmendel @mroeschke ? If accepted, maybe the PR could be extended to `case_when`?",
"Hi @nickodell ,\n\nI think `self` tries to align with `other` in `_where` as below.\n\nhttps://github.com/pandas-dev/pandas/blob/a2315af1df30ec3648786... |
3,203,070,509 | 61,780 | BUG: tz_localize(None) with Arrow timestamp | closed | 2025-07-04T15:08:39 | 2025-08-11T16:29:29 | 2025-08-11T16:29:29 | https://github.com/pandas-dev/pandas/issues/61780 | true | null | null | jbrockmendel | 1 | ### Pandas version checks
- [x] I have checked that this issue has not already been reported.
- [x] I have confirmed this bug exists on the [latest version](https://pandas.pydata.org/docs/whatsnew/index.html) of pandas.
- [x] I have confirmed this bug exists on the [main branch](https://pandas.pydata.org/docs/dev/ge... | [
"Bug",
"Datetime",
"Timezones",
"Arrow"
] | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | [
"Hi @jbrockmendel \n I’d like to work on this issue and submit a fix."
] |
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