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2021-03-13T16:43:50Z
2021-03-15T05:22:19Z
2021-03-14T23:43:56Z
CONTRIBUTOR
null
- [ ] closes #40375 - [ ] 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 A new suggestion was made to include code styling. Beginner's question: What is the p...
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BUG: clip where the bound is a series with NA values returns NA
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2021-04-23T14:58:07Z
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``` In [1]: import pandas as pd In [2]: pd.__version__ Out[2]: '1.2.3' In [3]: tmp = pd.DataFrame({'f': [1,2]}) In [4]: import numpy as np In [5]: tmp['h'] = np.nan #This is the expected behaviour In [6]: tmp['f'].clip(0, np.inf) Out[6]: 0 1 1 2 Name: f, dtype: int64 # This seems wrong: In ...
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40,421
Fix typing for extension arrays and extension dtypes without isin and astype
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2021-03-13T17:27:20Z
2021-05-02T00:11:14Z
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CONTRIBUTOR
null
Same as #39501 by removing changes related to `isin` and the overloads for `astype` and return type for `astype` Per discussion with @simonjayhawkins https://github.com/pandas-dev/pandas/pull/39501#issuecomment-798617105
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ENH: Styler.to_latex(): conditional styling with native latex format
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2021-03-13T20:49:09Z
2021-05-26T20:02:47Z
2021-05-24T13:44:07Z
CONTRIBUTOR
null
## Enhancing Styler to allow LaTeX Input - [x] closes #21673 also indirectly (by providing an alternative to DataFrame.to_latex): - [x] closes #38328 (enh: adding highlighting options to to_latex function) - [x] closes #28291 (enh: add option to format \hline in to_latex) - [x] closes #26278 (easier digit f...
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TYP: fix type-ignores in core
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2021-03-14T00:28:27Z
2021-03-14T16:24:11Z
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MEMBER
null
Also added some missing annotations I saw along the way.
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follow up #38344
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2021-03-14T09:12:31Z
2021-03-15T14:27:55Z
2021-03-14T23:50:51Z
CONTRIBUTOR
null
This PR is a minor fix/improvement to a recent PR which deprecated `set_na_rep` and `set_precision`. #40134 For a dataframe with 100,000 floats the current Styler default formatter will make 100,000 `get_option` lookups for the pandas precision. Doing this calculation once prevents all these lookups and saves jus...
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MEMBER
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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 - Combined test_series_agg_nested_renamer and test_series_nested_renamer via parametrization - test_transform_nested_renamer is al...
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831,130,231
MDU6SXNzdWU4MzExMzAyMzE=
40,427
"drop" fails by default when label to drop is not in the index, but "rename" silently passes by. Wouldn't it make sense to synchronize?
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2021-03-14T11:14:17Z
2021-10-29T02:13:25Z
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#### Is your feature request related to a problem? .drop and .rename have similar signatures to some extent, and implement basic dataframe functionalities. When drop is called and the label is not in the index, it fails by default (due to the errors='raise' default parameter). However, when rename is called with a l...
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831,130,692
MDExOlB1bGxSZXF1ZXN0NTkyNTIzNTE5
40,428
CLN: Don't modify state in FrameApply.agg
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2021-03-14T11:16:36Z
2021-03-15T02:27:44Z
2021-03-14T23:55:02Z
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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
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831,135,420
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40,429
DataFrame.from_records fails when the argument is Series with non-default index
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2021-03-14T11:42:24Z
2021-08-19T02:04:26Z
null
NONE
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Summary: if `from_records` is called upon a `Series` with index that doesn't start with `0`, it fails. ```python import pandas as pd print(f'Pandas version is {pd.__version__}') data = pd.Series([{'a': 1, 'b': 2}, {'a': 11, 'b': 22}], index=[10, 20]) pd.DataFrame.from_records(data.values) # works pd.DataFrame...
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MDExOlB1bGxSZXF1ZXN0NTkyNTUxNjMz
40,430
DEPR: **kwargs in ExcelWriter
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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 Currently ExcelWriter has **engine_kwargs to pass through to the engine, [although this is undocumented](https:...
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831,189,457
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40,431
CLN: remove unused file opening and mmap code from parsers.pyx
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2021-03-14T15:50:33Z
2021-03-15T01:08:54Z
2021-03-15T01:08:49Z
CONTRIBUTOR
null
The removed code has never been used since #36997. `TextReader` is only ever called with file handles.
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831,212,622
MDU6SXNzdWU4MzEyMTI2MjI=
40,432
ENH: Add an option to json_normalize() to protect nested object(s) against flattening
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2021-03-14T17:32:03Z
2021-08-19T02:04:56Z
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NONE
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#### Is your feature request related to a problem? Not really. I simply wish I could use pandas to [protect](https://stackoverflow.com/questions/66611187/protect-a-nested-object-against-flattening-when-using-pandas-json-normalize) a nested structure / object / dict against flattening when using [pd.json_normalize()]...
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831,222,716
MDExOlB1bGxSZXF1ZXN0NTkyNTkxNDMx
40,433
TYP: stubs for tslibs
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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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MDExOlB1bGxSZXF1ZXN0NTkyNjA2OTg2
40,434
TYP: fix type ignores
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40,435
BUG: append/concat for dataframes with DatetimeIndex having same timezone value but different tz classes results in change of Index type to generic Index (in place of DatetimeIndex)
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2021-03-14T21:30:51Z
2021-08-19T02:32:33Z
2021-08-19T02:32:32Z
NONE
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- [ Y] I have checked that this issue has not already been reported. - [Y ] I have confirmed this bug exists on the latest version of pandas. - [ Y] (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...
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BUG: DataFrame.query doesn't support equals or not equals for string columns with python parser
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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. --- #### Code Sample, a copy-pastable example ```python In [3]: import pandas as pd In [4]: pd.__version__ Out[4]: '1.2.3' In [5]: import numpy as np In [7]:...
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40,437
ENH: `escape` html argument in Styler.format
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2021-03-14T22:42:47Z
2021-03-23T17:32:29Z
2021-03-23T17:03:14Z
CONTRIBUTOR
null
- [x] closes #40388 Adds an HTML `escape` parameter to `Styler.format`, which acts to escape the data value **before** it is passed to a formatter. For example, `Styler.format('<a href="a.com/{0}">{0}</a>', escape=True)` will not escape the HTML as part of the formatting function, it will only escape the value `...
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DOC: Minor formatting in user_guide/window
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CONTRIBUTOR
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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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40,440
BUG: Unexpected behavior of setting item to DataFrame slice
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2021-05-02T23:47:54Z
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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. - [ ] (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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[ArrayManager] DataFrame constructor from ndarray
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2021-03-15T09:30:56Z
2021-04-26T17:42:54Z
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MEMBER
null
xref https://github.com/pandas-dev/pandas/issues/39146 Currently, the `DataFrame(ndarray)` construction for ArrayManager still went through BlockManager and then `mgr_to_mgr` conversion, which is less efficient. This PR adds a check in `ndarray_to_mgr` for directly creating an ArrayManager. ~It's still WIP, bec...
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BUG: read_excel fails with multirow headers if headers are followed by two empty rows
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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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BUG: Memory leak in json encoding for time related objects
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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. ------------- Hello, While using pandas in my project, I saw the memory usage of my pr...
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REF: move roperators to pandas.core
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2021-03-15T10:40:05Z
2021-03-24T07:26:28Z
2021-03-23T16:47:38Z
MEMBER
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This PR does 2 things: - change `pandas.core.ops.roperator` imports to all import the module and use `roperator.<rop>` instead of importing the actual functions (this makes the usage similar as for the non-reversed operators with `import operator`) - move `roperator.py` from pandas/core/ops to pandas/core, so it ca...
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831,702,616
MDExOlB1bGxSZXF1ZXN0NTkyOTgyOTA0
40,445
PERF: no need to check for DataFrame in pandas.core.computation.expressions
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3
2021-03-15T11:12:27Z
2021-03-23T13:59:52Z
2021-03-23T13:46:02Z
MEMBER
null
In practice, this case is only covered by specific tests using DataFrame in `test_expressions.py`, not from actual usage through ops (so I just updated the failing tests to not use any DataFrame as input to those checks). Although our test suite might not be the best suited to check that, since many tests are small a...
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831,797,895
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40,446
BUG: groupby fast_apply vs python apply handles same-indexed result differently
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2021-03-15T13:12:32Z
2021-08-12T16:21:47Z
2021-08-12T16:21:47Z
MEMBER
null
From https://github.com/pandas-dev/pandas/issues/39146#issuecomment-799397428 (discovered while investigating a benchmark difference). It seems that in groupby/ops.py, the `fast_apply` (using libreduction) vs the generic python apply gives a different result in case of same-indexed output of the function. Using a sm...
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40,447
read_csv: Warn when column cannot be parsed as dates
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1
2021-03-15T16:21:19Z
2021-03-16T16:22:52Z
2021-03-16T16:16:10Z
NONE
null
#### Is your feature request related to a problem? As a part of a research project, me and two co-authors have been mining GitHub for Jupyter notebooks and studied a number of frequent function calls in the notebooks. It appears that users sometimes make calls to `read_csv` where they specify that non-date data should...
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40,448
BUG: Series rolling standard deviation gives zero for small numbers
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2021-03-15T16:39:33Z
2021-03-16T04:05:25Z
2021-03-16T04:05:25Z
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. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- #### Code Sample, a copy-pastable example ```python import pandas as pd s = p...
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40,449
read_csv: Warn when too many names are specified
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2021-03-15T17:05:11Z
2021-03-16T16:01:20Z
2021-03-16T13:45:28Z
NONE
null
#### Is your feature request related to a problem? When you call `read_csv` and the length of `names` is larger than the number of columns in the data, extra column(s) containing only `NaN` will be added to the DataFrame created. I think that, generally, the extra name(s) is/are a sign of a bug in the program and/or i...
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832,073,321
MDExOlB1bGxSZXF1ZXN0NTkzMjk0MDUw
40,450
Fix StringArray.astype for category dtype
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2021-03-15T18:19:50Z
2021-04-02T19:10:02Z
2021-04-02T19:09:57Z
CONTRIBUTOR
null
- [X] closes #40351 - [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 This was failing due to `elif np.issubdtype(dtype, np.floating)` [here](https://github.co...
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40,451
BUG/API: Index.__new__ match Series datetime inference behavior
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2021-03-15T19:49:51Z
2021-11-08T16:37:34Z
2021-03-23T15:08:24Z
MEMBER
null
- [ ] closes #xxxx - [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 This makes us slightly more aggressive in casting to dt64 in `Index.__new__` (see the added...
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MDExOlB1bGxSZXF1ZXN0NTkzMzUxMDYy
40,452
TYP: fix ignores
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2021-03-15T19:53:24Z
2021-03-17T14:09:24Z
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MEMBER
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40,453
CLN: make `cell_context` DefaultDict like `ctx` - simplify code
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2021-03-15T20:04:18Z
2021-03-22T14:04:57Z
2021-03-22T12:59:31Z
CONTRIBUTOR
null
Making the variables and code in `Styler` consistent with each other and consistent in patterns so it is easier to work with (for me!) and newcomers. Also removing redundant code `cell_context.get("col_headings", {})` would **never** return anything other `{}`
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40,454
BUG: test_table_method_rolling_methods segfault on Mac
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2021-03-15T23:24:27Z
2021-03-23T02:38:46Z
null
MEMBER
null
i think it isnt getting run because it is "slow" works fine on Ubuntu. Might be a 3.9 thing; until fairly recently i couldnt install numba on 3.9 cc @mroeschke
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40,455
TYP: stubs for reshape, ops, ops_dispatch, hashing
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2021-03-16T01:06:12Z
2021-03-17T14:07:36Z
2021-03-17T10:05:45Z
MEMBER
null
manually curated, extra specificity in comments it is supported directly
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40,456
REF: back DatetimeBlock, TimedeltaBlock by DTA/TDA
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2021-03-16T01:19:45Z
2021-03-30T15:08:57Z
2021-03-30T12:51:50Z
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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 Broken off from #40149. Like #40149, this backs DTBlock/TDBlock by (sometimes 2D) DTA/TDA...
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40,457
CI: fix failing script/tests
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2021-03-16T02:21:25Z
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2021-03-16T15:32:18Z
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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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40,458
TST: csv parser segfaulting on malformed input.
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2021-03-16T03:40:50Z
2021-03-16T21:45:30Z
2021-03-16T20:31:41Z
CONTRIBUTOR
null
xref #14782 - [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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40,459
DOC: pandas.Series.str.replace has pandas.DataFrame.str.replace examples
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2021-03-21T15:24:17Z
2021-03-21T15:24:11Z
NONE
null
#### Location of the documentation https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.str.replace.html #### Documentation problem The documentation has DataFrame examples and not those related to Series #### Suggested fix for documentation Give examples related to Series.
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40,460
QST: Support of SQLAlchemy 2.0 in Pandas
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2021-03-16T08:30:01Z
2021-03-28T04:45:16Z
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After search in Stackoverflow and in your open and closed issues, I can't find any information about the support of SQL Alchemy 2.0 using `pd.to_sql()` --- #### Question about pandas An exemple is better than a talk. ```python from sqlalchemy import create_engine, MetaData, Table, Column, String, Integer ...
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40,461
BUG: inconsistency in division for scalar Offset vs series/array of Offsets
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2021-03-16T08:44:52Z
2021-03-19T17:08:27Z
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When dividing a scalar Offset with a numeric series, we get a timedelta64 series. But when dividing a Series of Offsets, we preserve the offsets. ``` In [26]: td = pd.offsets.Day(3) In [27]: td / pd.Series([1, 2]) Out[27]: 0 3 days 00:00:00 1 1 days 12:00:00 dtype: timedelta64[ns] In [28]: pd.Series(...
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BUG: operations with Offset fail for large arrays when using numexpr
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2021-03-16T08:45:19Z
2021-04-26T21:57:35Z
2021-04-26T21:57:35Z
MEMBER
null
When surpassing the minimum number of elements threshold to use numexpr, the following operation starts to fail: ``` In [19]: td = pd.offsets.Day(3) In [20]: td / pd.Series([1, 2]*5000) Out[20]: 0 3 days 00:00:00 1 1 days 12:00:00 ... 9998 3 days 00:00:00 9999 1 days 12:00...
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BUG/TST: run and fix all arithmetic tests with+without numexpr
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2021-03-16T10:40:58Z
2021-04-27T06:38:45Z
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MEMBER
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Closes #40462 This PR adds a auto-used fixture for `pandas/tests/arithmetic` that sets the `expressions._MIN_ELEMENTS` to 0, to force taking the numexpr path, even if our test data are small (which would otherwise never excercise the numexpr code path) Further, it makes some fixes to get the tests passing with th...
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BUG: Unusual behaviour in to_parquet re-load file
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2021-03-22T16:42:11Z
2021-03-22T16:42:11Z
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. --- **Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28...
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TYP: stronger typing in libindex
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2021-03-16T14:43:33Z
2021-03-17T14:08:53Z
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and more consistent naming/args for MultiIndex engine. Preliminary before making index.pyi
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QST: No common columns to perform merge on
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``` frequency = 'monthly' start = '1969-12-31' end = '2020-12-31' data = quandl.get(["ISM/MAN_PMI"], trim_start=start, trim_end=end) data.head() ``` ISM/MAN_PMI - PMI Date 1970-01-01 48.7 1970-02-01 47.4 1970-03-01 46.9 1970-04-01 45.0 1970-05-01 47.2 ``` df_log = numpy.log(df / df.shift(1)) df_log.head() ...
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BUG: run_callable is deprecated in sqlalchemy 1.4
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CONTRIBUTOR
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#### Code Sample, a copy-pastable example I've not yet been able to isolate the code path where `run_callable` is used https://github.com/pandas-dev/pandas/blob/ac3e3f71129bc9ea9ed0a27f3adcd89e367fa9af/pandas/io/sql.py#L1615-L1618 However, it looks like several tests, for example `pandas/tests/io/test_sql.py...
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Fixes 2/3 of the failures on master that im aware of. sqlalchemy is the one left out.
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read_excel() cannot read excel files properly with openpyxl
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2021-08-19T02:36:22Z
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`pandas 1.2.3, openpyxl 3.0.7` I read an excel file with pandas via openpyxl package. It converts the number in the `'ATC'` column to a weird bitwise string. Previously I was using `xlrd(1.2.0)` instead of `openpyxl` and it was working fine: ``` # with openpyxl 3.0.7 df = pd.read_excel('excel_file.xlsx') >>>...
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BUG: OverflowError when plotting with sharex=True
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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. --- I have two datasets from different sources. They span more or less the same time, ...
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compat: sqlalchemy deprecations
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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: series.replace(np.nan,..) on categorical series does not replace
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1
2021-03-16T20:37:52Z
2021-03-18T14:12:59Z
2021-03-18T09:01:29Z
MEMBER
null
- [ ] 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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833,227,397
MDExOlB1bGxSZXF1ZXN0NTk0MjYyOTY5
40,474
CLN: factorize returns ndarray[intp], not int64
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2021-03-16T21:55:59Z
2021-03-20T01:36:48Z
2021-03-20T01:10:03Z
MEMBER
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MDExOlB1bGxSZXF1ZXN0NTk0MjcyNjk3
40,475
CLN: intp_t instead of int64_t for indexers in libs funcs
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2021-03-16T22:18:14Z
2021-03-20T03:05:32Z
2021-03-20T02:34:22Z
MEMBER
null
The places where this will need updating proliferate, so right now im just looking to see how the 32bit builds handle this.
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40,476
TYP: get_reverse_indexer, get_group_index_sorter
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2021-03-16T23:51:56Z
2021-03-20T01:38:19Z
2021-03-20T01:09:25Z
MEMBER
null
nailing down all the "np.intp"s bit by little bit. AFAICT we're not going to be able to annotate ndarrays with ndim/dtype any time soon. Might be worth looking into https://pypi.org/project/nptyping/
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40,477
BUG: frame.any/all with bool_only=True and Categorical[bool]
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2021-03-17T03:37:05Z
2021-03-23T23:10:42Z
2021-03-23T22:50:18Z
MEMBER
null
Started with sharing some code, unearthed a bug along the way. Nothing user-facing since it is only in ArrayManager.
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40,478
BUG: `pd.core.dtypes.common.is_extension_array_dtype` wrong output for some dtypes
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2021-03-17T09:14:18Z
2021-03-22T09:44:56Z
2021-03-21T18:10:29Z
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. --- **Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28...
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40,479
REF: prepare (upcast) scalar before dispatching to arithmetic array ops
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2021-03-17T09:48:45Z
2021-04-28T14:50:46Z
2021-04-28T14:49:50Z
MEMBER
null
This moves the potential upcasting of python/numpy scalars to pandas scalars out of the actual array op (`arithmetic_op`), but moves it up to the Series / DataFrame level before calling the array op. This avoids calling it repeatedly on the same scalar for each column.
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40,480
BUG: setting values with array in mixed DataFrame disregards order of indexer
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2021-03-17T10:00:06Z
2021-04-13T23:19:56Z
2021-04-13T23:19:56Z
MEMBER
null
``` In [2]: df = DataFrame(index=[3, 5, 4], columns=["A", "B"], dtype=float) ...: df["B"] = "string" ...: df.loc[[4, 3, 5], "A"] = np.array([1, 2, 3], dtype="int64") In [3]: df Out[3]: A B 3 1 string 5 2 string 4 3 string ``` In the above (using master), the values [1, 2, 3] were se...
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40,481
Backport PR #40471: compat: sqlalchemy deprecations
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2021-03-17T11:57:30Z
2021-03-25T10:37:14Z
2021-03-17T13:09:35Z
MEMBER
null
Backport PR #40471
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40,482
REF: avoid broadcasting of Series to DataFrame in ops for ArrayManager
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2021-03-17T12:07:33Z
2021-11-15T19:07:10Z
null
MEMBER
null
xref https://github.com/pandas-dev/pandas/pull/39772 Currently, we broadcast a Series to a DataFrame for elementwise operations in the "op(df, series)" case. This is done (I think) to be able to perform the operation block-wise (which is only implemented for block/block case, and not for block/array). But, when us...
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40,483
BUG:read_excel no default style openpyx1
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2021-03-17T15:09:10Z
2021-03-22T12:53:01Z
2021-03-22T12:53:01Z
NONE
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i receive an excel attachment via outlook, after saving the file and running the python script the following warning is returned. "UserWarning: Workbook contains no default style, apply openpyxl's default" if the warning is ignored then read_excel report 2 header records when there are 7 header records. if I open ...
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40,484
BUG: Clearing a `Styler` should clear all
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2021-03-17T18:11:58Z
2021-04-02T17:20:24Z
2021-04-02T17:20:24Z
CONTRIBUTOR
null
Currently `Styler.clear()` will clear the styles built up with the `apply` `aaplymap` and `where` method. It will clear class from the `set_td_classes` method and it will clear tooltips set with `set_tooltips`. It does not clear table styles, and it does not clear formats. It does not reset hidden index or hidden co...
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40,485
DOC: Outdated Python version in contributing docs
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2021-03-17T18:29:32Z
2021-04-04T19:57:20Z
2021-04-04T19:57:20Z
CONTRIBUTOR
null
#### Location of the documentation [URL of the documentation](https://pandas.pydata.org/docs/development/contributing.html#creating-a-python-environment-pip) **Note**: You can check the latest versions of the docs on `master` [here](https://pandas.pydata.org/docs/dev/). (Problem exist in the latest version: [here]...
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TYP: index.pyi
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2021-03-17T19:19:52Z
2021-03-30T21:56:43Z
2021-03-30T21:21:28Z
MEMBER
null
- [ ] 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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40,487
BUG: `Series.explode` ignores `ignore_index` parameter when series is not a nested type
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2021-03-17T21:16:48Z
2021-04-02T22:35:24Z
2021-04-02T22:35:24Z
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. --- ```python >>> s = pd.Series([1, 2], index=['a', 'b']) >>> s.explode(ignore_index=True) a 1 b 2 dtype: int64 ``` #### Problem description Even though ...
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Cumsum not available to column of list-likes in groupby
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2021-03-17T21:25:54Z
2021-04-11T13:55:43Z
2021-04-11T13:55:34Z
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. - [x] (optional) I have confirmed this bug exists on the master branch of pandas. --- #### Code Sample, a copy-pastable example ```python df = pd.DataFrame({'a': [1,1,2...
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40,489
API: numeric inference in Series constructor
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2021-03-17T22:42:46Z
2021-08-08T23:34:29Z
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MEMBER
null
`Index.__new__` does inference on _numeric_ data more aggressively than `Series.__new__`. It would be nice if these behaviors matched. (xref #40451 also about differenced between Series vs Index inference, though in that case Series is more aggressive about inference) ``` data = np.array([np.nan, np.nan, 2.0], dt...
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REF: share to_native_types with ArrayManager
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2021-03-17T22:50:04Z
2021-03-19T17:01:12Z
2021-03-19T16:46:37Z
MEMBER
null
also combine implementations of Block.fill_value
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CLN: sqlalchemy deprecation, annotations, share shape properties
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MEMBER
null
- [ ] 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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834,344,558
MDExOlB1bGxSZXF1ZXN0NTk1MTc4NDAz
40,492
Two missing spaces in documentation
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2021-03-18T03:04:34Z
2021-04-11T00:32:25Z
2021-04-11T00:32:24Z
CONTRIBUTOR
null
I fixed the missing space that made the documentation render "isthe" instead of "is the". Before the change: - This **isthe** equivalent of the numpy.ndarray method argmax. - This **isthe** equivalent of the numpy.ndarray method argmin. After the change: - This **is the** equivalent of the numpy.ndarray method...
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834,489,463
MDExOlB1bGxSZXF1ZXN0NTk1MjkzODgz
40,493
DOC: Styler docs - split PR from #39720
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2021-03-18T07:40:03Z
2021-03-20T08:08:54Z
2021-03-20T01:17:05Z
CONTRIBUTOR
null
Split the docs upgrade in #39720 into these smaller changes just to `style.py` and will focus *only* on the user guide in that PR after this.
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40,494
[ArrayManager] TST: enable remaining top-level tests
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2021-03-18T07:46:20Z
2021-03-18T10:09:24Z
2021-03-18T10:09:19Z
MEMBER
null
xref https://github.com/pandas-dev/pandas/issues/39146
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MDExOlB1bGxSZXF1ZXN0NTk1MzEyMjU4
40,495
[ArrayManager] TST: run all tests with separate not slow / slow build
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2021-03-18T08:10:16Z
2021-03-20T19:55:21Z
2021-03-20T01:15:23Z
MEMBER
null
xref #39146
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40,496
[ArrayManager] TST: include subset of ArrayManager tests in all CI builds
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2021-03-18T08:48:04Z
2021-03-31T20:00:30Z
2021-03-25T08:28:21Z
MEMBER
null
xref #39146
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MDU6SXNzdWU4MzQ4ODUyMTI=
40,497
TST: rewrite test_expressions.py to use pytest idioms
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2021-03-18T14:30:13Z
2021-08-19T02:37:51Z
null
MEMBER
null
The [`test_expressions.py` test file](https://github.com/pandas-dev/pandas/blob/master/pandas/tests/test_expressions.py) could be updated to use some more pytest features (eg using fixtures for the test data, using fixture for the setup/teardown to set `_MIN_ELEMENTS`)
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40,498
BUG: Series.fillna is altering None values of unspecified columns
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2021-03-18T14:50:41Z
2021-10-26T19:54:58Z
null
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 (1.0.5) `series = pd.Series({'1':1,'2':None,'3':np.nan, '4':''}) ` will create a series which looks like: 1 1 2 None 3 NaN 4 d...
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40,499
BUG: pandas cannot open xlsx with openpyxl engine
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2021-03-18T15:24:00Z
2021-03-19T00:57:47Z
2021-03-19T00:57:47Z
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. - [ ] (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/...
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40,500
Re-evaluate the minimum number of elements to use numexpr for elementwise ops
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2021-03-18T16:07:50Z
2021-03-24T14:08:52Z
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MEMBER
null
Currently we have a MIN_ELEMENTS set at 10,000: https://github.com/pandas-dev/pandas/blob/00a622401e06bd7afaaa508707a46f3dcc494fe4/pandas/core/computation/expressions.py#L42-L43 However, I have been noticing while running lots of performance comparisons recently, that numexpr still seems to show some overhead at ...
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40,501
PERF: optimize is_numeric_v_string_like
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2021-03-18T16:17:55Z
2021-03-19T16:51:32Z
2021-03-19T16:51:29Z
MEMBER
null
In some of the arithmetic benchmarks (xref https://github.com/pandas-dev/pandas/issues/39146#issuecomment-799482699), just this `is_numeric_v_string_like` check takes up 15-35% of the overall time. This improves the performance of this check by using some ndarray-specialized dtype checks (checking the kind instead ...
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MDExOlB1bGxSZXF1ZXN0NTk1NzQyMDky
40,502
PERF: increase the minimum number of elements to use numexpr for ops from 1e4 to 1e6
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2021-03-18T16:27:29Z
2021-03-24T08:28:12Z
2021-03-20T01:14:14Z
MEMBER
null
See https://github.com/pandas-dev/pandas/issues/40500 for the analysis.
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40,503
TYP: nattype.pyi
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2021-03-18T18:27:03Z
2021-03-22T14:30:26Z
2021-03-22T12:43:14Z
MEMBER
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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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QST:keyerror message for a dataframe.head().to_dict()
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2021-03-18T18:47:09Z
2021-03-20T00:22:58Z
2021-03-19T03:09:08Z
NONE
null
- [ ] I have searched the [[pandas] tag](https://stackoverflow.com/questions/tagged/pandas) on StackOverflow for similar questions. - [ ] I have asked my usage related question on [StackOverflow](https://stackoverflow.com). I have a dataframe `season_statistics_T1`, its related information is given as follows. Ea...
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40,505
BUG: Remove artificial precision limit in rolling var & std
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2021-03-18T19:41:14Z
2021-03-21T22:02:18Z
2021-03-21T21:06:58Z
MEMBER
null
- [x] closes #37051, xref #40448, xref #39872 - [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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40,506
DOC: Fix documentation for DataFrame.groupby.transform
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2021-03-18T20:10:06Z
2021-03-25T01:45:18Z
2021-03-25T01:09:12Z
CONTRIBUTOR
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- The doc template should no longer reference "Series" transforms explicitly. - Make consistent the formatting for references to function argument names.
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BUG: Respect ignore_index in Series.explode
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MEMBER
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- [x] closes https://github.com/pandas-dev/pandas/issues/40487 - [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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TYP: parsers.pyi
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MEMBER
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40,509
BUG: fillna overwriting other missing vals
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2021-04-03T00:33:00Z
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- [x] closes #40498 - [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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MDExOlB1bGxSZXF1ZXN0NTk2MDk3MzQ2
40,510
CLN/PERF: remove unused out kwd in take_nd
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2021-03-19T01:39:03Z
2021-04-06T19:19:10Z
2021-03-22T14:32:36Z
MEMBER
null
And in a few places where we know allow_fill=False, just call the numpy version directly.
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40,511
CI: move 32-bit build to container job
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2021-03-19T03:54:57Z
2021-03-19T06:27:30Z
2021-03-19T06:27:30Z
MEMBER
null
Run 32-bit build in a container job to separate build steps.
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40,512
Pandas multiindex unstack fillna not working
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2021-03-19T04:32:11Z
2021-03-20T03:45:14Z
2021-03-20T03:45:13Z
NONE
null
When we unstacking the multi-indexed pandas `dataframe`, the method `fillna` does not work. Here is an example. ```python import numpy as np import pandas as pd df = pd.DataFrame(np.random.randint(0,10,(5,4)), columns=['c1','c2','c3','c4']) df.iloc[1,2] = np.nan df.iloc[0,0] = np.nan df[...
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40,513
CLN/TYP: remove unused arguments in merge
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2021-03-19T05:11:09Z
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835,651,438
MDU6SXNzdWU4MzU2NTE0Mzg=
40,514
BUG: json_normalize does not handle combining nested record_path and nested meta as expected
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2021-03-19T07:31:17Z
2021-08-19T02:39:18Z
null
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. - [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...
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835,700,503
MDExOlB1bGxSZXF1ZXN0NTk2MzE4NjYw
40,515
CLN/PERF: remove catching of numpy deprecation warning in comparison_op
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2021-03-19T08:35:33Z
2021-03-19T17:15:29Z
2021-03-19T17:15:26Z
MEMBER
null
xref https://github.com/pandas-dev/pandas/issues/39146 In some of the `FrameWithFrameWide` benchmarks, this takes up around 15% of the time. While I don't think this should be needed (but let's see if warnings appear in the CI builds).
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835,710,133
MDExOlB1bGxSZXF1ZXN0NTk2MzI2Njgw
40,516
STYLE no no-string-hints, combine some hooks
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2021-03-19T08:46:09Z
2021-03-19T15:01:36Z
2021-03-19T14:47:39Z
MEMBER
null
I got a PR into [pyupgrade](https://github.com/asottile/pyupgrade/blob/c90a455fceacdecc7484dab8519688353b6b2931/pyupgrade/_plugins/typing_pep563.py) to do what no-string-hints did (and in a much better way, their maintainer is amazing), so my little tool can be archived / removed from here :tada: Also combining som...
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BUG: NonExistentTimeError when resampling series localized to 'America/Santiago'
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2021-03-19T11:21:44Z
2021-04-14T18:23:25Z
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. --- #### Code Sample, a copy-pastable example ```python s = pd.Series(0.0, pd.date...
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BUG: Unexpected behaviour of groupby + rank(pct=True, method="dense")
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2021-03-19T12:27:08Z
2021-04-01T15:54:05Z
2021-04-01T15:54:05Z
NONE
null
- [x] I have checked that this issue has not already been reported. There was a [previous issue](https://github.com/pandas-dev/pandas/issues/15630) about `rank(pct=True, method="dense")` but it was about applying it to `pd.Series` and has been resolved. - [x] I have confirmed this bug exists on the latest version of...
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