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956,913,343
MDU6SXNzdWU5NTY5MTMzNDM=
42,821
ENH: change default min_count value for pandas.core.resample.Resampler.sum()
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2021-07-30T16:45:00Z
2021-08-21T20:23:27Z
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#### Is your feature request related to a problem? When using, pandas.core.resample.Resampler.sum(), the behavior I would expect based on using other resampler aggregation methods (e.g. mean, median,) is that if there is a gap in the time series values should be filled with NaNs, instead they are filled with 0's bec...
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42,822
REF: de-duplicate consolidation methods
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry
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956,953,606
MDExOlB1bGxSZXF1ZXN0NzAwNDcxNTgw
42,823
BUG: Pass copy argument to expanddim constructor in concat.
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2021-07-30T17:51:58Z
2021-08-12T18:10:55Z
2021-08-11T12:55:42Z
CONTRIBUTOR
null
- [x] closes #42501 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [x] whatsnew entry Pass the provided copy argument through to the DataFrame constructor when constructing a D...
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42,824
PERF: column_arrays
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2021-07-30T18:06:52Z
2021-08-28T21:12:28Z
2021-08-16T00:49:34Z
MEMBER
null
Shaves a couple percent off of time_to_json_wide asv
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DOC: .loc doesn't document that it can take sets or dicts as arguments
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2021-07-30T18:42:32Z
2021-08-21T20:24:09Z
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CONTRIBUTOR
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#### Location of the documentation https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.loc.html?highlight=loc#pandas.DataFrame.loc #### Documentation problem Surprisingly, the following code works: ```python import pandas as pd df = pd.DataFrame([["a", 1], ["b", 2], ["c", 3]], column...
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42,826
BUG: column names with degree sign make query fail
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2021-07-30T19:01:21Z
2021-08-04T23:51:10Z
2021-08-04T23:51:06Z
CONTRIBUTOR
null
This pull request adds DEGREESIGN (°) to tokens that are parsed and escaped in a backticked column. There are no separate issue reporting this, but this is similar to the EUROSIGN issue previously addressed. - [ ] closes #xxxx - [x] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://panda...
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42,827
CLN: collected cleanups
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry
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BUG: Exactly same check multiple times in if statement
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2021-07-30T22:09:26Z
2021-08-13T22:54:20Z
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CONTRIBUTOR
null
- [x] closes #42781 - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them
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Backport PR #42801 on branch 1.3.x (DataFrame.drop silently does nothing if MultiIndex has duplicates)
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Backport PR #42801: DataFrame.drop silently does nothing if MultiIndex has duplicates
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REF: remove unnecessary return value from ensure_data
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry
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- [x] closes #42403 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them
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MEMBER
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- [ ] closes #38703 - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry
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- [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [x] whatsnew entry A possible step toward #35725. Internally, agg may use apply and apply may use agg. Straightening these out so ...
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TST: clean old sql tests
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2021-07-31T19:31:29Z
2021-08-17T04:22:40Z
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remove skipped mysql tests, simplify old sqlite tests a small step towards #40686
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- [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them
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2021-07-31T21:04:39Z
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#### Is your feature request related to a problem? I wish there was a way to preserve verticle screen space when I'm inspecting 'tall' data frames. These are data frames with many observaitons but few columns. Thus, they're _tall_. I use the word tall to avoid conflating with _long_ data. #### Describe the soluti...
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BUG: `styler.hide_columns` now hides the index name header row
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2021-08-01T06:56:22Z
2021-08-03T19:30:09Z
2021-08-03T17:15:14Z
CONTRIBUTOR
null
- [x] closes #42101 - [x] closes #42190 (stale pr) Fixes `hide_columns` so that the index header row is also hidden alongside column headers. Can be back ported to 1.3.2
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BUG: Concat does not preserve category if lists of categories do not match.
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2021-08-01T14:43:05Z
2021-08-21T20:25:41Z
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- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- #### Code Sample, a copy-pastable example ```python import pandas as pd dfx =...
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CI: Upgrade codecov-action to v2
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REGR: sample modifying `weights` inplace
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BUG: DatetimeIndex has become unhashable in 1.3.1?
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2021-08-01T20:15:54Z
2021-11-20T16:19:43Z
2021-11-20T16:19:43Z
NONE
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- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- Hi, Following code below was working with pandas 1.2.5. It raises now an error w...
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ENH: Allow bar and barh plots to use index values for x position.
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2021-08-01T23:25:11Z
2021-10-21T02:01:54Z
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_Note_: This is my first attempt to contribute code to pandas, so any correction is more than welcome. This proposal adds a new parameter to the bar and barh plots, `positioning`, with the values: - sequential: The index values are added sequentially (`x=0, 1, 2, 3...`) and only the tick label shows the value. -...
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Updated README.md Grammar
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2021-08-02T13:21:22Z
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Suggested appropriate changes in grammar. - [ ] closes #xxxx - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry
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BUG: Pylance type annotation issue with loc
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2021-08-02T04:31:05Z
2021-08-02T07:31:40Z
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#### Code Sample, a copy-pastable example ```python import pandas as pd index = ["Firefox", "Chrome", "Safari", "IE10", "Konqueror"] index2 = [1, 2, 3, 4, 5] df = pd.DataFrame( { "http_status": [200, 200, 404, 404, 301], "response_time": [0.04, 0.02, 0.07, 0.08, 1.0], }, in...
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⬆️ UPGRADE: Autoupdate pre-commit config
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<!-- START pr-commits --> <!-- END pr-commits --> ## Base PullRequest default branch (https://github.com/pandas-dev/pandas/tree/master) ## Command results <details> <summary>Details: </summary> <details> <summary><em>add path</em></summary> ```Shell /home/runner/work/_actions/technote-space/create-pr-action/v2/nod...
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42,849
BUG: GroupBy's quantile incompatible with pd.NA
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- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- Firstly, here's a working example using the default dtypes: ```python df = pd....
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Backport PR #42787: BUG: 1D slices over extension types turn into N-dimensional slices over ExtensionArrays
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Backport PR #42787
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BUG: .value_counts converts pd.NA to np.nan
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CONTRIBUTOR
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- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- **Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28...
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Backport PR #42832 on branch 1.3.x (CI: Unpin jedi)
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Backport PR #42832: CI: Unpin jedi
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QST: I am getting valueerror: setting an array element with a sequence
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2021-08-02T13:26:48Z
2021-08-02T17:07:31Z
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NONE
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Struggling couple of hours with it, what is going wrong here? Trying to implement a demo from the tutorial "Art of Pandas" Here is my code that should replace an element in the array ``` import pandas as pd arr = pd.array([2, 5, 3], dtype="int") arr[0] = [1] ```
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ENH: Provide a method to convert DataFrames to structured arrays.
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CONTRIBUTOR
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Structured arrays can be significantly faster than record arrays: ``` In [1]: s = np.random.rand(1000, 2).astype([("a", float), ("b", float)]); r = s.view(np.recarray) In [2]: %timeit s["a"] 69.4 ns ± 0.0733 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each) In [3]: %timeit r["a"] 1.2 µs ± 10 ns pe...
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry Tracked all the places where _maybe_cast_slice_bound is called and concluded that stdlib da...
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BUG : Allow axis = 'columns' with limit and no method to work on fillna.
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CONTRIBUTOR
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- [x] closes #40989 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [x] whatsnew entry Added an if-condition for when axis = 1 so as to transpose the result in pandas/tests/fram...
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CI: Test doc build fails on ipython warning
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2021-08-02T22:08:52Z
2021-10-19T03:46:13Z
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MEMBER
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Testing build fails on ipython warning for #41410
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BUG GH#40498 Add mask to fillna to only modify indexes specified in v…
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2021-08-03T07:00:19Z
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CONTRIBUTOR
null
…alues. - [ ] closes #40498 - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry
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Backport PR #42842 on branch 1.3.x (CI: Upgrade codecov-action to v2)
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Backport PR #42842: CI: Upgrade codecov-action to v2
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CONTRIBUTOR
null
- [x] closes #42750 - [x] tests added / passed - [x] whatsnew entry
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BUG: negating pd.Na and `None`
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CONTRIBUTOR
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- [x] I have checked that this issue has not already been reported. - [ ] I have confirmed this bug exists on the latest version of pandas. - [x] I have confirmed this bug exists on the master branch of pandas. I don't really know how to describe this or if it is as expected but it seems strange behaviour to me: ...
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ArrowStringArray: delay/conditionally import pyarrow.compute
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MEMBER
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We currently check if pyarrow is available (and a sufficiently recent version), and if that's the case, simply import `pyarrow.compute`: https://github.com/pandas-dev/pandas/blob/3fe8e24a17170ad2296ecd81ba60e23cee763173/pandas/core/arrays/string_arrow.py#L63-L65 However, in theory, it is possible to have a pyarro...
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ENH: A new GroupBy method to slice rows preserving index and order
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2021-08-03T12:47:30Z
2021-10-15T13:28:43Z
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CONTRIBUTOR
null
#### Is your feature request related to a problem? Pandas provides DataFrameGroupBy.head() and tail(), which efficiently slice the beginning and end of each group while preserving the order and index. I would like to be able to do a general row slice with the same properties. DataFrame has head(), tail() and iloc th...
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Add warning about NA merges
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2021-08-03T13:05:01Z
2021-08-19T12:54:34Z
2021-08-19T12:54:30Z
CONTRIBUTOR
null
This is in reference to #32306. While the discussion on how to fix this is still ongoing, a warning will help users to at least know about this and take the appropriate precautions.
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BUG: DatetimeIndex de-serializing fails in PYTHONOPTIMIZE mode (python -O)
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2021-08-03T16:57:17Z
2021-08-05T11:48:24Z
2021-08-05T11:48:24Z
CONTRIBUTOR
null
- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [x] (optional) I have confirmed this bug exists on the master branch of pandas. --- #### Code Sample, a copy-pastable example Run python as PYTHONOPTIMIZE, optio...
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Backport PR #42839 on branch 1.3.x (BUG: `styler.hide_columns` now hides the index name header row)
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Backport PR #42839: BUG: `styler.hide_columns` now hides the index name header row
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DOC: to_latex documentation for Styler
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#### Location of the documentation https://pandas.pydata.org/docs/reference/api/pandas.io.formats.style.Styler.to_latex.html #### Documentation problem I think the set of packages needed to get this to work should be more clearly defined, given how different peoples' Latex setups are. For instance, the current...
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BUG: to_latex not escaping characters correctly
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2021-08-03T17:21:37Z
2021-08-08T12:01:46Z
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- [X ] I have checked that this issue has not already been reported. - [X ] I have confirmed this bug exists on the latest version of pandas. - [ X] (optional) I have confirmed this bug exists on the master branch of pandas. --- #### Problem description .to_latex() for Styler seems to have no way to hand...
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DEPR: Index inferring numeric dtype from ndarray[object]
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- [x] closes #40489 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry
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BUG: GH42866 DatetimeIndex de-serializing fails in PYTHONOPTIMIZE mode
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2021-08-03T17:36:59Z
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CONTRIBUTOR
null
- [x] closes #42866 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [x] whatsnew entry
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ENH: Support DataFrame.searchsorted
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#### Is your feature request related to a problem? Currently `searchsorted` is supported for `Series` and `Index` objects, however I wish to be able to use it with `DataFrame` objects as well. #### Describe the solution you'd like I'd like to be able to call `DataFrame.searchsorted(value, side, sorter)` like i...
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- [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them Ref: [ARROW-13074](https://issues.apache.org/jira/browse/ARROW-13074?page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel&focusedCommentId=173...
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DOC: add cookbook link about hidden sheets
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CONTRIBUTOR
null
- [x] closes #19842 - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them Just a tiny addition to the cookbook section of the User Guide.
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BUG: wrong/confusing error message in DataFrame.take with a scalar indexer
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``` In [4]: df = pd.DataFrame({'a': [1, 2, 3]}) In [5]: df.take(1) ... ~/scipy/pandas/pandas/core/indexes/range.py in take(self, indices, axis, allow_fill, fill_value, **kwargs) 433 ) -> Int64Index: 434 with rewrite_exception("Int64Index", type(self).__name__): --> 435 return ...
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QST: why pandas.Series.unique() behaves differently from numpy.unique()?
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2021-08-04T09:03:02Z
2021-08-04T11:14:07Z
2021-08-04T11:14:02Z
NONE
null
First of all, thank you for the great Pandas! The docs of `pandas.Series.unique()` clearly state that the function does NOT sort the elements. Differently, `numpy.unique()` sorts the elements. What is the reason behind this counterintuitive difference? It is quite unexpected and deemed to create nasty bugs in code -...
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42,877
TST: update message in skip_array_manager mark
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2021-08-04T09:34:16Z
2021-08-04T15:29:31Z
2021-08-04T15:26:07Z
MEMBER
null
Tiny PR, but I noticed this confusing message while running some tests (this skip is used generally, and JSON C code now actually no longer relies on the Block)
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42,878
BUG: np.mean(pd.Series) != np.mean(pd.Series.values)
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2021-08-04T09:37:14Z
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- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- #### Code Sample, a copy-pastable example ```python import pandas as pd impor...
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Backport PR #42861 on branch 1.3.x
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2021-08-04T10:26:08Z
2021-08-05T07:41:06Z
2021-08-04T12:28:37Z
CONTRIBUTOR
null
waiting on green tests
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ENH: sparse_series_to_coo performance
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2021-08-04T10:35:36Z
2021-09-05T01:45:01Z
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CONTRIBUTOR
null
#### Is your feature request related to a problem? Converting a sparse Series to a `scipy.sparse.coo_matrix` could be much faster. I think the `get_indexer` function defined in [`_to_ijv`](https://github.com/pandas-dev/pandas/blob/master/pandas/core/arrays/sparse/scipy_sparse.py#L22) adds unnecessary complexity. ...
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BUG: Misleading KeyError output on dataframe.drop(columns=['Col1', 'Col2']) when columns to drop are not present
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2021-08-10T20:06:45Z
2021-08-10T20:06:45Z
NONE
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- [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- #### Code Sample, a copy-pastable example ```python df = pd.DataFrame({ ...
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TST: remove chained assignment outside indexing tests
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2021-08-04T14:31:23Z
2021-08-04T15:52:20Z
2021-08-04T15:45:00Z
MEMBER
null
Small piece broken off from https://github.com/pandas-dev/pandas/pull/41878 This updates a bunch of tests that are unnecessarily using chained assignment. Outside tests specifically about indexing, I think it's better/cleaner to use the more idiomatic single .loc call (and also makes it easier to change the behavio...
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BUG: Using None in nested object MultiIndex causes reindex to misalign.
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- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [x] (optional) I have confirmed this bug exists on the master branch of pandas. --- **Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28...
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BUG: dataframe.rolling along rows drops float16
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2021-08-04T15:16:36Z
2021-08-05T12:02:57Z
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CONTRIBUTOR
null
- [x] closes #41779 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry
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PERF: Groupby.shift dont re-call libgroupby.group_shift_indexer
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2021-08-04T15:25:11Z
2021-08-04T22:47:51Z
2021-08-04T22:24:51Z
MEMBER
null
ATM we're calling libgroupby.group_shift_indexer for every column, but we only need to call it once.
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42,886
BUG: Raise proper TypeError for scalar indexer in Index.take
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2021-08-04T15:54:15Z
2021-10-31T00:49:27Z
2021-10-31T00:49:26Z
NONE
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- [x ] closes https://github.com/pandas-dev/pandas/issues/42875#issuecomment-892736707 - [ x] tests added / passed - [ x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [x ] whatsnew entry Fixes: https://githu...
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REF: move "split" indexing of rows/columns into internals?
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2021-08-04T16:02:40Z
2021-08-21T20:34:51Z
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MEMBER
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Currently, when indexing 2 dimensions at once, we typically handle each dimension independently in the `indexing.py` code. For example, consider the following `getitem` operation where we have both a row and column indexer: ```python df = pd.DataFrame(np.random.randn(10, 4), columns=["a", "b", "c", "d"]) subset...
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BUG: Cannot replace NaNs with None
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2021-08-04T19:31:35Z
2021-08-05T05:43:44Z
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NONE
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- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- Previously, we were able to replace NaN values with `None` for easier insertion into...
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MEMBER
null
- [x] closes #38988 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them
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TST: DataFrame initialization with an empty DataFrame with dtype
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2021-08-04T21:25:25Z
2021-08-31T23:42:17Z
2021-08-31T23:42:14Z
CONTRIBUTOR
null
- [x] closes #20654 - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them
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BUG: DataFrame.update changes type of updated values
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- [x] I have checked that this issue has not already been reported. - [ ] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- **Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/0...
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API: make concat_compat match CategoricalIndex._concat
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2021-08-04T21:31:59Z
2021-11-09T04:30:45Z
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xref #41626 This will probably need to be done with a deprecation, this is just to to clarify which tested behaviors would change.
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Backport PR #42508 on branch 1.3.x (read_excel() modifies provided types dict when accessing file with duplicate column)
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Backport PR #42508: read_excel() modifies provided types dict when accessing file with duplicate column
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TST: add read_json test with date values GH33787
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2021-08-04T22:48:35Z
2021-08-05T12:02:39Z
2021-08-05T12:02:33Z
CONTRIBUTOR
null
- [x ] closes #33787 - [x ] tests added / passed - [x ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry First attempt at contributing to pandas, or any open source projects! I think all the l...
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BUG: DataFrame[Int64].mean().dtype is object, should be Float64
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2021-08-04T23:38:27Z
2021-11-07T15:33:42Z
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MEMBER
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This breaks the last corner case I want to test for #33036. ``` arr = np.random.randn(4, 3).astype("int64") df = pd.DataFrame(arr).astype("Int64") df.iloc[:, 1] = pd.NA # <-- incorrectly casts to object, lets cast back and ignore that for now df = df.astype("Int64") res = df.mean() >>> res 0 0.0 1 ...
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TST: move custom business day tests to own file (#27085)
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CONTRIBUTOR
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- [ ] xref #27085 (chips away at, yes) - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry Continuation of https://github.com/pandas-dev/pandas/pull/42284 Moving...
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REF: share maybe_cast_slice_bound DTI/TDI/PI
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry
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BUG: dataframe.goupby()
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i have a .py document work ok in before edition, but fail in 1.3.1 these two sentence fail: a = abc.loc[:, ['name', 'gl', 'time']] output = a.groupby(['name']).sum().reset_index() it run ok before, but under pandas edition 1.3.1, it report fail. i found output is not what i want , it only have one serie...
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BUG: Error in apply operation on groupby if subset of columns are selected
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2021-08-10T19:29:41Z
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- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- #### Code Sample, a copy-pastable example ```python import numpy as np import...
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ENH: replace() to produce values from dict-like generators like defaultdict (use map instead)
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2021-08-05T08:13:12Z
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[Question I asked on stackoverflow with example-code](https://stackoverflow.com/questions/68662268/pandas-series-replace-not-generating-default-value-from-defaultdict/) #### Acceptable alternative One could explicitly call a non-existing key with .map() instead of .replace(). And this would serve as a good alternat...
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Backport PR #42304: DEPS: update setuptools min version
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Backport PR #42304
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BUG: groupby.ohlc returns Series rather than DataFrame if input is empty
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2021-08-12T09:05:44Z
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CONTRIBUTOR
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- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. (tested 1.3.1) - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- #### Code Sample, a copy-pastable example ```python # This returns ...
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Backport PR #42720 on branch 1.3.x (CLN: clean the conda-to-pip script)
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Backport PR #42720: CLN: clean the conda-to-pip script
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Backport PR #42871 on branch 1.3.x (BUG: GH42866 DatetimeIndex de-serializing fails in PYTHONOPTIMIZE mode)
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2021-08-05T11:48:31Z
2021-08-05T13:32:42Z
2021-08-05T13:32:41Z
NONE
null
Backport PR #42871: BUG: GH42866 DatetimeIndex de-serializing fails in PYTHONOPTIMIZE mode
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42,905
BUG: RecursionError using `agg` on a resampled SeriesGroupBy
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2021-08-05T12:31:35Z
2021-09-06T20:37:19Z
2021-09-06T20:37:19Z
NONE
null
- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. --- When you mix `resample` with `groupby` and try to use the `agg` method to supply multiple functions to either a DataFrameGroupBy or SeriesGroupBy, Python suddently exi...
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42,906
BUG:Getting KeyError when saving style multiindex pandas to excel
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2021-08-05T16:35:09Z
2021-08-06T06:18:35Z
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NONE
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When saving a `df` that has been style into excel, compiler return > KeyError: "['A'] not in index" import pandas as pd import numpy as np def color_negative_red(value): if value < 0: color = 'red' elif value > 0: color = 'green' else: ...
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42,907
DOC: DataFrameGroupBy.transform
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2021-08-05T17:25:37Z
2021-08-21T20:38:29Z
null
NONE
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#### Location of the documentation https://pandas.pydata.org/docs/reference/api/pandas.core.groupby.DataFrameGroupBy.transform.html #### Documentation problem In my eyes, the documentation makes it very unclear how `func` (which is also mislabeled `f` in the parameter descriptions) is actually applied to each ...
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42,908
Inconsistent date parsing of to_datetime
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2021-08-05T18:55:45Z
2021-08-27T08:29:50Z
2021-08-26T21:18:13Z
MEMBER
null
- [x] xref #12585 - [x] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry carries on from https://github.com/pandas-dev/pandas/pull/35428
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42,909
TST: reorganize misplaced month / business month tests (#27085)
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2021-08-05T22:01:29Z
2021-08-06T00:00:38Z
2021-08-05T23:39:11Z
CONTRIBUTOR
null
- [ ] xref #27085 (chips away at, yes) - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry Continuation of: * https://github.com/pandas-dev/pandas/pull/42284 *...
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MDExOlB1bGxSZXF1ZXN0NzA1MDcyODkx
42,910
cln: remove printing statements
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2021-08-05T22:55:54Z
2021-08-06T06:02:24Z
2021-08-05T23:34:50Z
CONTRIBUTOR
null
removes `print` from tests.
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CI: Add ASV Bot
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2021-08-06T00:53:57Z
2021-09-18T17:45:41Z
2021-09-04T14:09:45Z
MEMBER
null
- [ ] closes #41157 - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry Triggers with command ``@github-actions benchmark -b ^regexgoeshere``(doesn't work rn, nee...
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QST: Generate sentece_id from the word column.
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2021-08-06T07:41:22Z
2021-08-06T07:50:31Z
2021-08-06T07:50:11Z
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I want to generate sentece_id from the word column. Between two fullstop puncuation ( | ,?, !) all the words will be counted as a sentence_id . I have two columns named as Words and Labels . I wanna generate a new column which specify the words of the same sentences as an unique id . I have the words and labels colum...
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42,913
ENH: Series types does not support inverse indexing
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2021-08-06T10:31:54Z
2021-08-06T10:42:28Z
2021-08-06T10:42:12Z
NONE
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#### Is your feature request related to a problem? Indexed data on series types does not support inverse indexing (like lists in Python). #### Describe the solution you'd like In the Series type, I wish negative index to count data from the back. #### Additional context ```python r = [1, 2] ser = pd.Se...
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42,914
ENH: add kw `level` to `Styler.hide_columns`
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2021-08-06T12:00:09Z
2021-08-09T10:49:14Z
2021-08-09T10:49:08Z
CONTRIBUTOR
null
follows #42636, which added `levels` to `Styler.hide_index`. This adds same functionality.
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42,915
BUG: df.groupy().rolling().cov() does not group properly and the cartesian product of all groups is returned instead
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2021-08-06T12:25:57Z
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null
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null
- [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- ```python import pandas as pd print(pd.__version__) df_a = pd.DataFrame({"val...
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ENH: Add anti-joins to pandas.merge
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2021-08-06T14:02:50Z
2021-08-15T17:45:25Z
null
NONE
null
#### Is your feature request related to a problem? Pandas does not allow anti-joins. It would be helpful to have these added Pyspark has implemented this on its 'join' command. https://spark.apache.org/docs/latest/sql-ref-syntax-qry-select-join.html #### Describe the solution you'd like Add anti-left and a...
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42,917
BUG: Can't get the index location of values in df.loc
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NONE
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- [x] I have checked that this issue has not already been reported. - [ ] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- **Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28...
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42,918
BUG: "ValueError: Must provide strings." when using "string" as dtype
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- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- **Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28...
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COMPAT: Support fastparquet 0.7.1
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2021-08-06T16:40:31Z
2021-08-09T17:05:55Z
2021-08-08T23:09:19Z
MEMBER
null
- [ ] closes #42588 - [ ] tests added / passed - [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [ ] whatsnew entry Also adds support for ``use_nullable_dtypes`` keyword. Technically, its not our enhancemen...
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42,920
BUG: read_fwf raise if len colspec doesnt match len names
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2021-08-06T19:40:42Z
2021-09-01T05:46:11Z
2021-08-31T23:43:10Z
CONTRIBUTOR
null
- [x] closes #40830 - [x] tests added / passed - [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them - [x] whatsnew entry
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