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26,913
Tracking issue for EA Series Operations Support
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2019-06-18T00:53:59Z
2020-09-19T14:35:38Z
2020-09-19T14:35:37Z
NONE
null
*Stale*
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26,914
WIP/POC: Allow (N, 1) and (1,N) EAs
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2019-06-18T01:30:21Z
2021-11-20T23:23:20Z
2019-07-01T20:57:03Z
MEMBER
null
Discussed on the mailing list last week, cc @TomAugspurger @jreback @jorisvandenbossche The central claim: if we allow EAs to take on shapes (N, 1) and (1, N), then we can get some major simplifications in core.internals. For the proof of concept I've made the Datetimelike arrays accept these shapes and updated ...
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MDU6SXNzdWU0NTcyMzAxOTc=
26,915
Should Pandas adopt a naming convention for its protocol methods
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2019-06-18T02:34:47Z
2019-08-02T15:00:26Z
2019-06-19T17:14:48Z
NONE
null
numpy has defined various protocol extensions over the years, and has consistently named them with an array prefix, and "dunder" notation: - `__array__` - `__array_prepare__`, `__array_wrap__`, [Subclassing ndarray](http://docs.python.org/doc/numpy/user/basics.subclassing.html) - `__aray_ufunc__` [NEP13](https://...
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26,916
BUG: Fix timedelta64+Timestamp, closes #24775
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2019-06-18T03:08:55Z
2019-06-25T14:10:04Z
2019-06-25T12:48:14Z
MEMBER
null
- [x] closes #24775 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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MDU6SXNzdWU0NTcyOTM3MDk=
26,917
Tabular numbers should be used on tables
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2019-06-18T06:55:39Z
2020-02-10T07:45:35Z
2020-02-10T07:45:35Z
NONE
null
**Describe the bug** Tables rendered in Jupyter Lab (likely also Jupyter Notebook), e.g. from pandas, do not use tabular numbers. This causes sorted columns to look unsorted and makes numbers harder to read and compare. **To Reproduce** Create a table like this: <img width="299" alt="Screenshot 2019-06-14 at ...
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MDExOlB1bGxSZXF1ZXN0Mjg5MTM2MjA2
26,918
WIP [DOC/EA]: developer docs for implementing Series.round/sum/etc in EA
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2019-06-18T07:17:23Z
2019-07-31T16:20:22Z
2019-06-30T16:44:46Z
NONE
null
This summarized my current understanding of how the dispatch of Series methods *should* work for EA (related https://github.com/pandas-dev/pandas/issues/26913, https://github.com/pandas-dev/pandas/issues/26730, and https://github.com/pandas-dev/pandas/issues/26835) and It also provides helpful warnings against the sev...
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26,919
BUG: DataFrame(ndarray, dtype=..) does unsafe conversion
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2019-06-18T12:14:57Z
2021-05-21T15:45:13Z
2021-05-21T15:45:13Z
MEMBER
null
From https://github.com/pandas-dev/pandas/pull/26848. When you pass a ndarray to the DataFrame constructor and specify a dtype, this does a "plain" numpy `astype`, which can have some unwanted side-effects (that we avoid in other parts of pandas) such as np.nan -> integer conversion and out of bounds timestamps: ```...
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26,920
Lookback methods (rolling/ewm/etc.) should accept series instead of just int/float
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1
2019-06-18T13:46:09Z
2019-06-21T21:18:31Z
2019-06-21T21:18:27Z
NONE
null
#### Issue: Using variable lookback-lengths in pandas methods Per underlying stock asset, I utilize a homodyne discriminator derived from close prices which determines the appropriate lookback length for other indicators such as macd, smart volume, ehlers rsi, etc. When I retrieve history on an asset, the data ar...
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457,500,347
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26,921
pandas.DataFrame.plot error for time series data
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2019-06-18T14:00:13Z
2020-05-31T08:18:13Z
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#### Code Sample ```python import pandas as pd idx = pd.date_range(start="2018", freq=pd.DateOffset(days=1), periods=2) ts = pd.DataFrame({"A": [1, 2]}, idx) ts.plot() ``` #### Problem description I created the index of a time series using pd.date_range and provided the frequency as a `DateOffset` object....
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26,922
Link from, for e.g., version/0.22/generate, to stable/reference
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2019-06-18T14:12:02Z
2019-06-18T19:10:34Z
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Google often drops me in specific documentation from a single release, rather than the stable reference. For example the google search [pandas groupby aggregate](https://www.google.com/search?safe=active&rlz=1C1CHBD_en-GBIE841IE842&ei=4eMIXbCFKaXD8gKrzJLoBg&q=pandas+groupby+aggregate&oq=pandas+groupby+aggregat&gs_l=psy...
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457,511,195
MDExOlB1bGxSZXF1ZXN0Mjg5MzA1MjMz
26,923
Calculate normalized freqs in value_counts correctly when bins is not None
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7
2019-06-18T14:19:51Z
2019-09-20T14:53:02Z
2019-09-20T14:53:02Z
CONTRIBUTOR
null
- [x] closes #25970 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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457,512,284
MDU6SXNzdWU0NTc1MTIyODQ=
26,924
DOC: Disallow crawlers in development docs
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2019-06-18T14:21:51Z
2019-06-18T23:57:08Z
2019-06-18T23:57:08Z
MEMBER
null
(continiung the discussion in https://github.com/pandas-docs/pandas-docs-travis/pull/3#issuecomment-503148283) Afaik we're currently not telling search engine which is the copy of the documentation they should be indexing. They seem to be smart enough, and they've been returning the right restults so far, but given ...
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MDU6SXNzdWU0NTc1MjA4MTc=
26,925
Index dtype is changed to object after left join
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11
2019-06-18T14:36:38Z
2021-07-10T05:02:48Z
null
NONE
null
#### Code Sample ```python import pandas as pd import numpy as np left = pd.DataFrame( columns=['A'], index=pd.Index([], name='id', dtype=np.int64) ) right = pd.DataFrame( [[5]], columns=['B'], index=pd.Index([42], name='id', dtype=np.int64) ) res_idx_dtype = left.join(right).ind...
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26,926
STY: use black
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11
2019-06-18T14:41:47Z
2019-07-07T11:23:58Z
2019-07-07T11:23:58Z
CONTRIBUTOR
null
I have seen a number of other project adopt: https://pypi.org/project/black/, as well as use in my company. This basically is a style formatter that plays nice with flake8 and is completely opionated, the only option is line-length. This is a good thing. This would involve a one-time updating of code (though we c...
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457,549,865
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26,927
Dataframe.mean with numeric_only=False results in error with strings
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8
2019-06-18T15:28:57Z
2021-11-13T17:32:21Z
null
NONE
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd df = pd.DataFrame({ 'A': [0, 1, 2], 'B': ['a', 'b', 'c'], 'C': [4, 5, 6] }) df.mean(axis=0, numeric_only=False, skipna=False) ``` #### Problem description Instead of outputting a `NaN` for a non-numeric column of strings ...
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26,928
ENH: Add circular statistics methods for DataFrames and Series
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2019-06-18T16:52:26Z
2019-06-18T18:51:16Z
2019-06-18T18:51:16Z
NONE
null
Let me know if this is out of scope, but it would be nice to perform typical statistics calculations on circular quantities with a similar interface as, e.g., `mean` --> `circmean`, including the `level` arg. It would also be great to be able to note that the input is in degrees to avoid having to convert back and fort...
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26,929
BUG: DataFrame.shift with axis=1 shifts object columns to the next column with object dtype
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2019-06-18T17:32:55Z
2020-09-26T22:58:41Z
2020-09-26T22:58:41Z
NONE
null
#### Code Sample ```python2.7 import pandas as pd import StringIO # Store the csv string in a variable gps_string = """ "2010-01-12 18:00:00","$GPGGA","180439","7249.2150","N","11754.4238","W","2","10","0.9","-8.1","M","-12.4","M","","*57","","","" "2010-01-12 17:30:00","$GPGGA","173439","7249.2160","N","...
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457,609,179
MDU6SXNzdWU0NTc2MDkxNzk=
26,930
CI: Write azure failed builds summary as a GitHub comment
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2019-06-18T17:35:19Z
2021-07-10T05:04:16Z
null
MEMBER
null
I think it'd safe us a significant amount of time, if when a build fails, we get a nice github comment with the problems. The same idea as what pep8speaks does for linting, but for most things. I think in some cases it'll save us from having to navigate to the logs (which in azure is even more complex than needed, s...
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DOC: Disallowing search engines in the development docs
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2019-06-18T20:25:05Z
2019-06-19T08:20:58Z
2019-06-18T23:57:08Z
MEMBER
null
- [X] closes #26924 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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457,700,747
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26,932
CI: Running tests with xvfb for the clipboard to work
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2019-06-18T21:17:54Z
2019-06-20T10:41:28Z
2019-06-20T10:41:27Z
MEMBER
null
- [X] closes #26887 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry With some luck this should make the clipboard tests work in azure. @jorisvandenbossche @jreback can you have a look once the CI finishes?
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26,933
DOC: Make section title capitalization consistent #26830
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2019-06-18T23:12:48Z
2019-06-19T17:44:57Z
2019-06-19T00:10:35Z
CONTRIBUTOR
null
- [x] closes #26830 Adjusted titles in Docs to have consistent first letter only capitalization, unless proper noun in title.
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457,763,423
MDU6SXNzdWU0NTc3NjM0MjM=
26,934
Issue with parsing PeriodDtype columns in read_csv()
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2019-06-19T01:25:47Z
2019-07-17T11:50:47Z
2019-07-17T11:50:47Z
NONE
null
#### Code Sample ```python df = pd.DataFrame({'Int': [1, 2, 3], 'Period': pd.period_range(start="2019-01", end="2019-03", freq="M")}) df.to_csv("PeriodDtype.csv") pd.read_csv("PeriodDtype.csv", dtype={"Int": np.int64, "Period": pd.PeriodDtype("M")}) ``` #### Problem description Using pandas 0.24.2, I wrote...
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457,775,458
MDU6SXNzdWU0NTc3NzU0NTg=
26,935
A unified method dispatch protocol for ExtensionArrays
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2019-06-19T02:25:25Z
2019-08-02T15:44:13Z
2019-07-08T01:49:52Z
NONE
null
What I'd like to have is: 1. a single, unified interface for dispatching Series methods 2. which supports EA 3. for all methods 4. and allows every method to be overridden by EA, as-needed 5. supports NA 6. doesn't require EA authors to implement some methods to signature-compatible with numpy (`round`), and sign...
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26,936
Add type hint for (core.arrays).ranges
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2019-06-19T02:31:44Z
2019-06-21T04:11:23Z
2019-06-21T01:48:23Z
CONTRIBUTOR
null
- [x] xref #26792 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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26,937
WIP: `overlaps` handling of empty intervals in Interval and IntervalArray
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2019-06-19T03:39:41Z
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NONE
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This supercedes #26894, which made `Interval()` raise an exception on attempts to create of the form `[x,x)` or `(x,x]`. - [X] closes #26893 - [x] tests added / passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [X] whatsnew entry Discussion in #26893 suggests we may want to treat e...
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26,938
pivot_table raises DataError: No numeric types to aggregate with Timedelta
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2019-06-19T09:35:32Z
2021-02-11T15:12:20Z
2019-06-19T10:26:23Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python In [1]: import pandas as pd In [2]: df = pd.DataFrame({"Name": ["A", "B", "C", "B", "A", "C"], "Laptime": [48.0,48.0,48.0,48.0,48.0,48.0], "Time": [12.0, 14, 16, 62, 60, 64]}) In [3]: df.dtypes Out[3]: Name object Laptime float64 Ti...
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26,939
BUG: cannot set Series with reverse slicer
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2019-06-19T10:46:29Z
2019-08-28T23:01:47Z
2019-08-28T23:01:47Z
CONTRIBUTOR
null
Minimal example: ``` >>> import pandas as pd >>> s = pd.Series(index=range(2010, 2020)) >>> s.loc[2015:2010:-1] = [6, 5, 4, 3, 2, 1] Traceback (most recent call last): [...] ValueError: cannot set using a slice indexer with a different length than the value ``` I see no reason why this shouldn't work, as set...
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BUG: Fix skiplist init error with empty window
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2019-06-19T11:44:17Z
2019-07-11T15:47:45Z
2019-06-21T01:19:27Z
CONTRIBUTOR
null
- [x] fixes MemoryError issue in #26005 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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DOC: Validate consistency of title capitalization
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2019-06-19T13:16:37Z
2020-03-07T20:06:26Z
2020-03-07T20:06:26Z
MEMBER
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In #26933, we're making the capitalization of the title sections consisten. We use to have many titles capitalized as `This is the Section Title`, and we changed all them (probably few were forgotten) to `This is the section title`. To keep this consistency, we should validate that the capitalization is correct in t...
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Docs: Capitalisation of title line changed to lower case
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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458,039,800
MDU6SXNzdWU0NTgwMzk4MDA=
26,943
pandas.read_hdf leaves file open when requested data key does not exist
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2019-06-19T14:14:09Z
2019-06-21T09:11:58Z
2019-06-21T09:11:58Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python import pandas data = pandas.read_hdf(<h5_file_name>, mode='r', key=key) ``` #### Problem description When trying to read HDF5 file and the requested key object does not exist in the file, pandas pytables raises `KeyError('No object named {key...
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458,047,034
MDU6SXNzdWU0NTgwNDcwMzQ=
26,944
Slicing an index with DateTime throws AttributeError: 'int' object has no attribute 'stop'
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2019-06-19T14:26:43Z
2019-07-01T18:19:17Z
2019-07-01T18:19:17Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python idx = pd.IndexSlice dt_index = pd.date_range(start="1jan2019 00:15:33",periods=100,freq="h") #this will fail #dt_index = pd.date_range(start="1jan2019",periods=100,freq="d") #this works zf = pd.DataFrame(index=dt_index) zf['foo']=10 zf['...
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458,052,168
MDU6SXNzdWU0NTgwNTIxNjg=
26,945
ufunc[Series, Series] should align before aplying the ufunc?
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2019-06-19T14:35:50Z
2019-07-23T20:46:44Z
2019-07-23T20:46:28Z
CONTRIBUTOR
null
Should this align before doing the ufunc? ```python In [1]: import numpy as np In [2]: import pandas as pd In [3]: s1 = pd.Series([1, 2, 3]) In [4]: s2 = s1.iloc[[0, 2, 1]] In [5]: np.add(s1, s2) Out[5]: 0 2 1 5 2 5 dtype: int64 ``` IMO, the expected output should be ``` In [6]: n...
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26,946
modfy[SparseArray] raises
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2019-06-19T15:08:48Z
2019-06-19T17:57:41Z
2019-06-19T17:57:41Z
CONTRIBUTOR
null
```python In [1]: import pandas as pd; import numpy as np In [2]: sparse = pd.SparseArray([0.0, 3.5], fill_value=0.0) ...: r1, r2 = np.modf(sparse) ...: --------------------------------------------------------------------------- AttributeError Traceback (most rec...
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26,947
BUG: modf(SparseArray)
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2019-06-19T15:19:48Z
2019-06-19T18:40:58Z
2019-06-19T17:57:41Z
CONTRIBUTOR
null
Closes #26946
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MDU6SXNzdWU0NTgxMDg5OTA=
26,948
to_csv header=False not working
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2019-06-19T16:25:13Z
2020-01-21T04:28:47Z
2020-01-21T04:28:47Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python # Your code here c = a.apply(fixsub, axis=1) c = c.fillna("nan") c.to_csv('solution2.csv', header=False, index=False) ``` #### Problem description Even after putting header=False, header keeps coming in the csv #### Expected Output no ...
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458,128,386
MDExOlB1bGxSZXF1ZXN0Mjg5Nzk4NDk4
26,949
WIP/CI/TST: Clean up of the tests script
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2019-06-19T17:12:24Z
2019-09-08T15:59:55Z
2019-09-08T15:59:55Z
MEMBER
null
Follow up of the conversation in #26932, and fixing some of the things that #24106 tried. The main change is **call pytest once** instead of once for `single` and once for `multi`. This shouldn't be a problem since I add the parameter `--dist=loadfile` which should prevent tests in the same file running in parallel....
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26,950
DOC: Make section title capitalization consistent #26830
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2019-06-19T17:24:26Z
2019-06-27T21:25:13Z
2019-06-27T21:25:03Z
CONTRIBUTOR
null
- [X] closes #26830 This superseeds #26933, and should contain all the fixes requested there.
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26,951
Additional tests for ufunc(Series)
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2019-06-19T18:02:20Z
2019-06-21T15:58:34Z
2019-06-21T15:58:29Z
CONTRIBUTOR
null
This adds a set of tests for ufuncs on Series. The goal is to establish the correct behavior prior to implementing `Series.__array_ufunc__`. There are two kinds of xfails right now 1. Series[Sparse] fails because `Series.__array_ufunc__` doesn't yet dispatch to `Series.array.__array_ufunc__` 2. `ufunc(seri...
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26,952
CI: api.test_api.TestPDApi.test_api fails irrelevantly
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2019-06-19T22:00:22Z
2019-06-20T11:48:14Z
2019-06-20T11:48:14Z
CONTRIBUTOR
null
#### Problem description In the pull request #26940, I have changed a piece of code in `pandas/_libs/window.pyx`. Tests pass successfully (including those in tests/api) on my local but not on CI. It seems that `hard_dependencies, dependency, missing_dependencies` are on the pd namespace and not deleted as supposed (...
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26,953
TST: Fix flaky import test
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2019-06-20T01:38:08Z
2019-06-20T11:48:18Z
2019-06-20T11:48:14Z
CONTRIBUTOR
null
I'm not sure why, but the missing dependency test is causing issues. Now we check that things work by running it in a subprocess with site-packages disabled. Closes https://github.com/pandas-dev/pandas/issues/26952
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MDExOlB1bGxSZXF1ZXN0Mjg5OTM1NzMx
26,954
POC: 2D support for 1D ExtensionArray subclasses
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24
2019-06-20T01:52:41Z
2021-11-20T23:23:22Z
2019-07-01T20:57:14Z
MEMBER
null
[ci skip] Companion to #26914 trying out a way to implement 2D methods for EA subclasses that don't do it natively. Chose the arrow EA as the example to start with, then discovered that equality checks return a scalar instead of operating elementwise, so mostly just comparing the shapes.
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458,310,393
MDU6SXNzdWU0NTgzMTAzOTM=
26,955
Column headers out of alignment in 10 MInutes tutorial
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2019-06-20T02:57:46Z
2021-07-10T05:08:10Z
null
NONE
null
Beginning at line `In [93]:` in getting_started/10min.html, the column headers of the output data frames go out of alignment. Is this meant to have a semantic meaning that is not addressed by the tutorial commentary? #### Code Sample, a copy-pastable example if possible ```python df = pd.DataFrame({'A': ['foo...
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MDU6SXNzdWU0NTgzNjc2NDQ=
26,956
TypeError: to_html() got an unexpected keyword argument 'line_width'
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3
2019-06-20T06:15:19Z
2019-06-21T02:18:49Z
2019-06-21T02:18:49Z
NONE
null
While the documentation [https://pandas.pydata.org/pandas-docs/version/0.22/generated/pandas.DataFrame.to_html.html](https://pandas.pydata.org/pandas-docs/version/0.22/generated/pandas.DataFrame.to_html.html) promises the parameter `line_width` (at the bottom of the parameters list), using this parameter throws the err...
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MDExOlB1bGxSZXF1ZXN0Mjg5OTg5NzA3
26,957
TST: fix class method of test BoolArray
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2
2019-06-20T06:18:12Z
2019-06-20T06:59:23Z
2019-06-20T06:58:53Z
MEMBER
null
From discussion in https://github.com/pandas-dev/pandas/pull/26914.
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458,410,904
MDU6SXNzdWU0NTg0MTA5MDQ=
26,958
ENH: provide nunique method on Rolling object
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2019-06-20T07:58:10Z
2019-06-20T12:26:39Z
null
MEMBER
null
GroupBy objects expose a `nunique` method of Series/DataFrame (and also for `resample` it works), but Rolling does not: ``` In [89]: values = np.random.choice(np.arange(10), 100) ...
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26,959
API? how to do a "rolling groupby" or groupby with overlapping groups?
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2019-06-20T08:21:41Z
2020-06-17T10:24:22Z
null
MEMBER
null
Sparked by @betatim's question on twitter: https://twitter.com/betatim/status/1141321049918906368 Suppose you have the following data: ``` repo_id = np.random.choice(np.arange(1000), 10000) index = pd.Timestamp("2019-01-01") + pd.to_timedelta(np.random.randint(0, 24*30*6, size=10000), unit='H') df = pd.DataFra...
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MDU6SXNzdWU0NTg1NTgwMzk=
26,960
Why do I get strange aggregation result from DataFrame groupby()?
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1
2019-06-20T09:55:57Z
2019-06-20T12:22:00Z
2019-06-20T12:22:00Z
NONE
null
#### Pandas version: 0.22 #### Problem I try to use the numpy.size() to count the group size for the groups from pandas Dataframe groupby(), and I get strange result. Can any guys explain how the aggregation of groupby works? ```python >>> df=pd.DataFrame({'A':[1,1,2,2], 'B':[1,2,3,4],'C':[0.11,0.32,0.93,0.65],'...
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26,961
BUG: Fix TypeError by adding line_width argument to to_html() (#26956)
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2019-06-20T10:29:35Z
2019-06-21T02:30:43Z
2019-06-21T02:30:43Z
NONE
null
Closes #26956 Added in the line_width argument to the to_html() function to prevent TypeError being thrown when argument used.
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26,962
CI: Fix Azure Pipelines problem with PATH
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2019-06-20T11:18:22Z
2019-08-07T09:38:42Z
2019-08-07T09:38:42Z
MEMBER
null
We should be able to set the environment variable `PATH` in an Azure Pipelines job with `echo '##vso[task.prependpath]$HOME/miniconda3/bin'`. See https://github.com/pandas-dev/pandas/blob/master/azure-pipelines.yml#L27 But that didn't work when we implemented it, so we ended up setting the path manually in every ste...
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26,963
qcut fails with labels=True
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2019-06-20T11:57:26Z
2020-04-05T02:10:08Z
null
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null
The docs say that `qcut()` takes either a list or a boolean as its `labels` argument. The argument is `None` by default. This, which I would have expected to give me the standard set of labels -- like None -- errors: ```python pd.qcut(range(5), 4, labels=True) ``` This may well be expected behavior, but it do...
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458,638,271
MDU6SXNzdWU0NTg2MzgyNzE=
26,964
BUG: NaNs converted to 1970-01-01 instead of NaT
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5
2019-06-20T12:48:53Z
2019-07-07T20:36:38Z
2019-07-05T03:14:52Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd import numpy as np s = pd.Series([1, 2, np.nan, np.nan, np.nan]).astype('M8[ns]') print(s) ``` 0 1970-01-01 00:00:00.000000001 1...
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458,642,968
MDExOlB1bGxSZXF1ZXN0MjkwMjA1Njc5
26,965
REF: remove special-casing for internal EAs from format_array
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11
2019-06-20T12:58:31Z
2019-08-28T16:46:05Z
2019-08-28T16:46:04Z
MEMBER
null
- [ ] closes #26837 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [n/a ] whatsnew entry cc @jorisvandenbossche changes to tests for spacing before Datetime64TZ, which now have additional space.
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MDExOlB1bGxSZXF1ZXN0MjkwMjMwNDky
26,966
Surface NumPy FutureWarning about comparisons
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6
2019-06-20T14:00:58Z
2019-06-21T01:11:56Z
2019-06-21T01:11:56Z
CONTRIBUTOR
null
Closes https://github.com/pandas-dev/pandas/issues/22698 Specifically, see https://github.com/pandas-dev/pandas/issues/22698#issuecomment-458968300. I don't think we need to worry about the others in https://github.com/pandas-dev/pandas/issues/22698#issuecomment-422446071 datetimearray and integer array. I could...
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MDU6SXNzdWU0NTg2ODk4NDk=
26,967
Length information in error message of sanitize_index
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4
2019-06-20T14:24:01Z
2019-06-26T19:51:12Z
2019-06-26T19:51:03Z
NONE
null
It may be helpful for quicker debugging to provide information of data and index lengths in the error message in sanitize_index function: https://github.com/pandas-dev/pandas/blob/2115bf3d58ecc20aa2b10e05574eaa06de1e56ec/pandas/core/internals/construction.py#L516 The modified code could be: raise ValueError(f'Leng...
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DO NOT MERGE: Timing test files
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2019-06-20T14:34:50Z
2019-06-29T09:14:09Z
2019-06-29T09:14:08Z
MEMBER
null
Checking how long every test file takes to run in the CI. In #26949 I'd like to run tests constraining that a whole file must be run in a single worker (so we can run `single` tests in parallel). This means that files that will take a lot of time won't be parallelized well, and should be splitted for this to work. S...
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ValueError in series.py when using transform on groupby object
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2019-06-20T15:36:48Z
2021-07-10T05:09:21Z
null
NONE
null
I am seeing a ValueError when running the following example code ``` import pandas as pd import numpy as np if __name__ == '__main__': print(pd.__version__) print(np.__version__) df = pd.DataFrame({'ID': [1,1,2,3,3], 'VALUE': [110,110,200,300,301]}) dfg = df.groupby('ID')['VALUE'] p...
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458,762,085
MDU6SXNzdWU0NTg3NjIwODU=
26,970
pprint_thing for sequences
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5
2019-06-20T16:42:24Z
2020-07-03T08:50:52Z
2019-06-24T09:49:49Z
CONTRIBUTOR
null
I am using a custom dataclass as in the index of a DataFrame, which works fine. However, since it implements the Sequence protocol, pprint_thing is rendering every element, rather than the object itself. I would rather use the __str__ method that I have written. I know I can avoid this by changing "pprint_nest_depth" o...
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26,971
Code sample on pandas.Series.eq page is for pandas.Series.add
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2019-06-20T16:57:17Z
2019-06-20T18:45:47Z
2019-06-20T18:45:42Z
NONE
null
#### Problem description The code sample shown in the "Examples" section on the [doc page for pandas.Series.eq](https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.eq.html) appears to be for pandas.Series.add instead of eq. ![image](https://user-images.githubusercontent.com/14127094/59866977-...
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458,855,981
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26,972
Index(SparseArray([int])) has object type
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2019-06-20T20:21:19Z
2021-07-10T05:10:12Z
null
CONTRIBUTOR
null
```python In [2]: pd.Index(pd.SparseArray([1, 2])) Out[2]: Index([1, 2], dtype='object') ``` Should this be an Int64Index?
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26,973
HDFStore cannot read Pytables file when where specified
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2019-06-20T20:34:50Z
2020-05-16T20:38:32Z
null
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python import tables as tb import pandas as pd # write with pytables arr = np.zeros(4, dtype={'names':('size', 'age', 'weight'), 'formats':('i2', 'i4', 'u8')}) arr[0] = 2 arr[2] = (1, 2, 3) fn = 'myfile2' fileh = tb.open_fil...
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26,974
Index constructor doesn't validate kwargs
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21
2019-06-20T22:26:36Z
2020-12-22T23:45:29Z
2020-12-22T23:45:29Z
CONTRIBUTOR
null
```python In [4]: pd.Index([1, 2], abc=1) ...
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26,975
Assorted cleanups
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2019-06-20T23:00:10Z
2019-06-21T00:56:41Z
2019-06-21T00:51:19Z
MEMBER
null
- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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26,976
algos.take calling validate_indices incorrectly?
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2019-06-21T01:43:05Z
2019-06-27T18:33:20Z
2019-06-27T18:33:20Z
MEMBER
null
https://github.com/pandas-dev/pandas/blob/master/pandas/core/algorithms.py#L1528 In core.algorithms.take: ``` if allow_fill: # Pandas style, -1 means NA validate_indices(indices, len(arr)) result = take_1d(arr, indices, axis=axis, allow_fill=True, fill_value=fill_value) ``` It...
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26,977
Abnormal results on multiIndex difference
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2019-06-21T02:17:44Z
2019-06-26T02:11:37Z
2019-06-22T01:46:36Z
NONE
null
#### Code Sample, a copy-pastable example if possible ``` arrays = [['a', 'b', 'c', 'd'], [1,2,3,4]] tuples = list(zip(*arrays)) index = pd.MultiIndex.from_tuples(tuples, names=['first', 'second']) index1 = index.copy() index1.difference(index) #This should be empty results but I got following result...
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26,978
ENH: Reset MultiIndex at specific column levels
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9
2019-06-21T04:54:00Z
2019-07-29T03:14:34Z
2019-07-11T16:07:57Z
CONTRIBUTOR
null
- [x] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry **Code Sample** ```python >>> index = pd.MultiIndex.from_tuples([('bird', 'falcon'), ('bird', 'parrot'), ('mammal', 'lion'), ('mammal', 'monkey')], names=['class', 'name']) >>> columns = pd.Multi...
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26,979
CLN: clean-up sanitize_array series construction
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2019-06-21T07:08:27Z
2019-06-28T12:32:45Z
2019-06-28T12:32:41Z
MEMBER
null
Some possible clean-up that I encountered when doing https://github.com/pandas-dev/pandas/pull/26848/
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26,980
rolling method: use time window and win_type
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2
2019-06-21T08:21:17Z
2020-05-08T19:44:05Z
null
NONE
null
I have the same problem with this [StackOverflow post](https://stackoverflow.com/questions/47377581/pandas-rolling-specifying-time-window-and-win-type), I reproduce it here. The goal is to calculate weighted time-based moving average over an irregular time series #### Code Sample ```python import pandas as pd f...
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26,981
DOC: Do not mention private classes in the documentation
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2019-06-21T08:50:03Z
2019-06-23T11:58:07Z
2019-06-23T11:58:07Z
MEMBER
null
The public documentation shouldn't mention private classes, which the users are not expected to know about, and they could be removed in the future without proper deprecation. We've got a script to find them, it can be run with `./scripts/validate_docstrings.py --errors=GL04` Currently there are those cases: ```...
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26,982
DOC: Fix docstring quotes in pandas.tseries
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2019-06-21T09:51:24Z
2020-09-28T15:39:32Z
2020-09-28T15:39:32Z
MEMBER
null
In pandas we keep the quotes in the docstrings standardized in the next way: ```python def foo(): """ This is correct. """ ``` But for historical reasons we still have many of this form: ```python def foo(): """This is incorrect.""" ``` We have a script that is able to detect the wrong...
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BLD: wheel building is failing
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2019-06-21T11:38:44Z
2019-06-24T14:32:23Z
2019-06-24T14:32:22Z
CONTRIBUTOR
null
after the latest round of merges, seems wheel buidling is failing: https://travis-ci.org/MacPython/pandas-wheels/builds/548526771 ``` =================================== FAILURES =================================== _______________________ test_missing_required_dependency _______________________ [gw1] linux -- ...
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Use pytest tmp file management fixtures instead of ensure_clean[_path|_dir]
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2019-06-21T12:53:01Z
2021-07-10T05:11:06Z
null
CONTRIBUTOR
null
Opened as of discussion in https://github.com/pandas-dev/pandas/pull/26818. `tests/io/test_pytables.py` uses a context manager called `ensure_clean_path`. It might be worth using the pytest `tmp_path` fixture instead which I think provides everything we need with less code (also easier to understand for new contribu...
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26,985
Performance drop and MemoryError during insert and _consolidate_inplace
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2019-06-21T15:39:48Z
2020-12-11T02:35:42Z
2020-12-11T02:35:42Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd import numpy as np n = 2000000 data = pd.DataFrame({'a' : range(n)}) for i in range(1, 100): data['col_' + str(i)] = np.random.choice(['a', 'b'], n) for i in range(1, 600): data['test_{}'.format(i)] = i print...
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26,986
CLN: move pytables tests to tests/io/pytables dir
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2019-06-21T16:09:09Z
2019-06-21T17:55:34Z
2019-06-21T17:55:28Z
CONTRIBUTOR
null
This is a follow-up to [this comment](https://github.com/pandas-dev/pandas/pull/26818#issuecomment-504443559). This moves two test modules (`test_pytables.py` and `test_pytables_missing.py`) into the new `tests/io/pytables` directory introduced in https://github.com/pandas-dev/pandas/pull/26818. @jreback let me k...
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459,281,629
MDU6SXNzdWU0NTkyODE2Mjk=
26,987
AttributeError with divmod(Series, Series) with 0 in the denominator
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2019-06-21T16:38:08Z
2019-07-06T21:45:47Z
2019-07-06T21:45:47Z
CONTRIBUTOR
null
Strange one. This works, ```python In [39]: a = pd.Series([1, 1]) In [40]: divmod(a, pd.Series([1, 2])); ``` This raises ```pytb In [41]: divmod(a, pd.Series([0, 2])); --------------------------------------------------------------------------- AttributeError Traceback (most r...
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26,988
Bug: Series[category].replace casts incorrectly
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2019-06-21T17:17:01Z
2019-11-16T21:54:02Z
2019-11-16T21:54:02Z
MEMBER
null
``` dti = pd.date_range('2016-01-01', periods=3, tz='US/Pacific') ser = pd.Series(dti) cat = ser.astype('category') >>> cat 0 2016-01-01 00:00:00-08:00 1 2016-01-02 00:00:00-08:00 2 2016-01-03 00:00:00-08:00 dtype: category Categories (3, datetime64[ns, US/Pacific]): [2016-01-01 00:00:00-08:00, 2016-01...
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26,989
Series with MultiIndex "at" function raises "TypeError"
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2019-06-21T17:30:57Z
2020-05-25T22:07:51Z
2020-05-25T22:07:50Z
NONE
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#### Code Sample ```python # Your code here import pandas as pd s = pd.Series(index=pd.MultiIndex.from_tuples([('a', 0)])) s.loc['a', 0] # loc function works fine, no complaints here s.at['a', 0] # raises TypeError ``` #### Stack Trace: ``` Traceback (most recent call last): File "<stdin>", line 1, i...
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459,340,387
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26,990
Show astype example with dict in docs
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2019-06-21T19:25:24Z
2019-06-22T19:19:38Z
2019-06-22T19:19:38Z
CONTRIBUTOR
null
It would be useful to be able to change a column dtype inline. For example with a DataFrame-level astype() overload: Assuming `df` has a column called `str_col` that is a string (object), `df.astype(col='str_col', dtype='int').head()` The use case that brought me here is to numerically sort a string column with...
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459,347,016
MDU6SXNzdWU0NTkzNDcwMTY=
26,991
Can't read cvs using Pandas
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2019-06-21T19:45:39Z
2019-06-24T11:13:01Z
2019-06-24T11:13:01Z
NONE
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variable = pandas.read_csv(r"C://Users/zialecuyermorison/Desktop/data/iris.csv") header.sepal_length( ) ```python --------------------------------------------------------------------------- FileNotFoundError Traceback (most recent call last) <ipython-input-61-ef9a5393d1d5> in <modul...
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459,357,546
MDExOlB1bGxSZXF1ZXN0MjkwNzM1NDc3
26,992
add type hint for core/computation/eval
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2019-06-21T20:18:46Z
2019-09-08T16:41:51Z
2019-09-08T16:41:44Z
CONTRIBUTOR
null
- [x] closes #26792 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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26,993
xfail test_missing_required_dependency test
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2019-06-21T20:58:02Z
2020-04-28T20:42:11Z
2019-06-21T22:10:44Z
CONTRIBUTOR
null
See https://github.com/MacPython/pandas-wheels/pull/50. I can't get this test to work reliably.
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26,994
DOC: df.astype example using dictionary
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2019-06-22T01:05:34Z
2019-06-22T19:41:24Z
2019-06-22T19:19:38Z
CONTRIBUTOR
null
Closes #26990
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26,995
Non-Deep copy for Categorical?
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2019-06-22T02:47:40Z
2019-06-27T21:22:38Z
2019-06-27T21:22:38Z
MEMBER
null
Categorical.copy passes `values=self._codes.copy()`, and doesn't have a `deep=False` kwarg (which the base ExtensionArray does). This is causing trouble in #26954. Is this intentional @TomAugspurger? Pandas-internal EAs with `copy` behavior not respecting `deep` kwarg: - [ ] Categorical (no kwarg at all) - [ ] D...
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26,996
BUG: Series.rolling min_period is ignored and NA behaves strangely
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2019-06-22T05:08:59Z
2020-01-26T00:29:40Z
2020-01-26T00:29:40Z
NONE
null
Using current d39a6de668 This may be two separate issues, I can't tell. ### Case 1. ```python import pandas as pd ser=pd.Series(range(10)) ser[:5]=None print(ser) pd.Series(ser).rolling(3, min_periods=3).count() ``` returns ``` 0 0.0 1 0.0 2 0.0 3 0.0 4 0.0 5 1.0 6 2.0 7 ...
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26,997
DOC: Do not mention private classes in the documentation
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2019-06-22T09:30:32Z
2019-06-23T11:58:07Z
2019-06-23T11:58:07Z
CONTRIBUTOR
null
- [x] closes #26981 - [x] tests `python validate_docstrings.py --errors=GL04` passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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26,998
DataFrame.reset_index(inplace=True) with column names collision brakes dataframe
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2019-06-22T12:03:22Z
2021-10-29T02:22:14Z
null
NONE
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#### Code Sample, a copy-pastable example if possible ```python import pandas as pd import numpy as np a = pd.DataFrame( np.random.random(12).reshape([4,3]), columns = ['A', 'B', 'C'], index = pd.MultiIndex.from_product([['p','q'],['x','y']], names=['A','D']), ) print(a) # A ...
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26,999
to_excel() TyperError: Unsupported type <class 'pandas._libs.tslibs.period.Period'> in write()
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2019-06-22T12:57:10Z
2019-06-28T12:38:32Z
2019-06-28T12:38:32Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python writer = pd.ExcelWriter(Path().resolve() / 'output' / 'out.xlsx') for dftup in exportlist: dftup[0].to_excel(writer, sheet_name=dftup[2]) ``` #### Problem description Note that a similar issue was covered in in #19242, but with a different da...
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27,000
Proposal: Shorter default Series/DataFrame repr when truncated
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2019-06-22T13:41:00Z
2019-07-03T21:59:48Z
2019-07-03T21:59:48Z
MEMBER
null
There haven been previous attempts to reduce the length of the Series/DataFrame repr (`pandas.options.display.max_rows`), eg https://github.com/pandas-dev/pandas/pull/20514. Related pandas-dev email: https://mail.python.org/pipermail/pandas-dev/2018-March/000732.html In that discussion, I once made the following pro...
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27,001
BUG: fix empty Series repr for subclasses
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2019-06-22T13:44:00Z
2019-07-09T15:02:19Z
2019-06-25T00:47:47Z
MEMBER
null
Currently, the 'Series' name is hardcoded in the empty repr. This small patch ensures it uses the name of the class.
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27,002
Improve DataFrame.to_string()
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2019-06-22T14:13:03Z
2019-06-24T02:27:07Z
2019-06-24T02:27:07Z
NONE
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Add the following options: - Draw borders: specify border characters and which ones to draw _(similar to [texttable](https://pypi.org/project/texttable/))_ - Allow multi-line cells for long strings instead of truncation (they are visually separated by the borders) - ~~Use [Markdown table format](https://help.githu...
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27,003
AssertionError with DataFrame.from_records() when it should create column of nulls
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2019-06-22T19:44:45Z
2021-07-10T05:23:24Z
2021-07-10T05:23:23Z
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https://github.com/pandas-dev/pandas/blob/cb00deb94500205fcb27a33cc1d0df79a9727f8b/pandas/core/frame.py#L1430-L1556 I passed a list of data with 5 columns but a column header list of 6 items. The documentation for `pd.DataFrame.from_records()` says: > any names not found in the data will become all-NA columns ...
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459,519,791
MDExOlB1bGxSZXF1ZXN0MjkwODUzNTgw
27,004
TST: fix flaky test
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2019-06-22T23:28:15Z
2019-06-23T16:10:38Z
2019-06-23T09:05:27Z
MEMBER
null
One of the tests that uses this fixture modifies its value, so the `scope` kwarg is incorrect. The failure depends on the order in which the test is run. AFAICT only showing up on OSX. Hits one of the checkboxes in #26823.
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MDExOlB1bGxSZXF1ZXN0MjkwODY2ODMy
27,005
Add informal definition of "label" in note
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2019-06-23T06:12:16Z
2019-06-30T08:40:10Z
2019-06-24T14:23:57Z
NONE
null
The term "label" is used extenisively, but (AFAICT) it is never explained what a "label" is. Is an integer offset a label? Do labels apply to rows and columns, multi-indexes? What's the relation between an "index" "axis" and "label" ... etc. - [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `git diff upst...
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27,006
BUG: XlsxWriter ignoring formats on numpy types if merged cells
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2019-06-23T06:12:41Z
2019-06-28T23:11:27Z
2019-06-28T12:38:32Z
CONTRIBUTOR
null
The XlsxWriter `write_cells` method takes a `cells` parameter that is itself derived from a generator of the various cells in the DataFrame. It calls the `_value_with_format()` to convert any numpy types to Python types for the Excel writer. In the section of code that deals with writing merged cells, the original ...
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27,007
CLN: Fix typos (mainly in docs and comments)
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2019-06-23T07:46:10Z
2019-06-24T15:56:10Z
2019-06-24T15:52:42Z
CONTRIBUTOR
null
- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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27,008
to_excel Mishandles Mixing of tz-aware datetimes
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2019-06-23T11:14:10Z
2019-06-29T20:54:28Z
2019-06-29T20:54:28Z
NONE
null
#### Code Sample, a copy-pastable example if possible ``` In [14]: import pandas as pd In [14]: ew = pd.ExcelWriter('test.xlsx') In [15]: df = pd.DataFrame([pd.to_datetime('2019-06-22 01:11'), pd.to_datetime('2019-06-22 01:11 ...: Z'), pd.to_datetime('2019-06-22 01:11MSK')]) In [16]: df Out[16]: ...
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27,009
PLT: Cleaner plotting backend API, and unify Series and DataFrame accessors
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2019-06-23T12:18:33Z
2019-07-03T18:28:35Z
2019-07-03T18:21:02Z
MEMBER
null
- [X] xref #26747 - [ ] tests added / passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry The main changes are: The API that backends need to implement is simply a function `plot(data, kind, **kwargs)`. After testing different approaches (abstract class previously m...
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27,010
TST: Fix flaky test
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2019-06-23T19:27:36Z
2019-06-27T21:31:35Z
2019-06-27T21:27:18Z
MEMBER
null
Addresses one of the checkboxes in #26823
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27,011
BUG: ensure_index inconsistently coerces np.nan to pd.NaT depending if timezones are present
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2019-06-23T20:23:59Z
2019-07-24T11:42:49Z
2019-07-24T11:42:49Z
MEMBER
null
#### Code Sample, a copy-pastable example if possible On master: ```python In [1]: import numpy as np; import pandas as pd; pd.__version__ Out[1]: '0.25.0.dev0+783.g2b9b58dad' In [2]: ts_list = [pd.Timestamp('2018-01-01'), np.nan] ...: tstz_list = [pd.Timestamp('2018-01-01', tz='UTC'), np.nan] In [3]: pd...
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27,012
TST: fixture names for REPL usability
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2019-06-23T21:05:35Z
2019-11-05T22:11:20Z
2019-11-05T22:11:20Z
MEMBER
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The pytest docs (https://docs.pytest.org/en/latest/deprecations.html#calling-fixtures-directly) suggest a pattern that would make fixturized tests a zillion times less frustrating to troubleshoot when they fail. Instead of ``` @pytest.fixture def whatever(): ``` We use ``` def whatever(): @pytest.fixtu...
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