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https://api.github.com/repos/pandas-dev/pandas/issues/14008
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171,310,138
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14,008
BUG: PeriodIndexGrouper fails with Grouper selection
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2
2016-08-16T02:42:01Z
2021-05-01T23:16:39Z
null
CONTRIBUTOR
null
xref #13961 ``` In [3]: df = pd.DataFrame({'date': pd.period_range('2015-01-01', freq='D', periods=5), ...: 'a': np.arange(5)}, ...: index=pd.MultiIndex.from_arrays([ ...: [1,2,3,4,5], ...: pd.period_range('2015-0...
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171,386,005
MDU6SXNzdWUxNzEzODYwMDU=
14,009
'items' can not be the column name of a DataFrame?
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2016-08-16T11:31:25Z
2016-08-16T13:19:04Z
2016-08-16T13:19:00Z
NONE
null
#### Code Sample, a copy-pastable example if possible ``` df = pd.DataFrame({'items':[1,2,3], 'test': [2,3,4]}) df.items ``` #### Expected Output ``` 0 1 1 2 2 3 Name: items, dtype: int64 ``` #### Given Output `AttributeError: 'DataFrame' object has no attribute 'items'` #### output of `pd.show_versions()` ...
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171,417,376
MDExOlB1bGxSZXF1ZXN0ODE0NzYxMzI=
14,010
TST: add comprehensive coercion tests
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2016-08-16T13:57:56Z
2016-08-17T10:33:41Z
2016-08-17T10:33:24Z
MEMBER
null
- [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` 1st attempt to make dtype related tests more comprehensive. Validate whether tests classes have test methods covering dtype and Series/Index. Some of them are empty yet, going to add it gradually.
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171,462,081
MDU6SXNzdWUxNzE0NjIwODE=
14,011
DataFrame with one column, which is categorical: single rows convert to scalars
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2016-08-16T16:41:16Z
2019-11-10T19:11:28Z
2019-11-10T19:11:28Z
NONE
null
#### Code Sample, a copy-pastable example if possible ``` python In [2]: pd.DataFrame({'x': pd.Categorical('a b c d e'.split())}).iloc[0] Out[2]: 'a' ``` #### Expected Output I think this should be a Series with one element: ``` python 0 a dtype: category Categories (5, object): [a, b, c, d, e] ``` by analogy wi...
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171,473,817
MDU6SXNzdWUxNzE0NzM4MTc=
14,012
read_csv treats \x00 as EOL instead of null value
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2016-08-16T17:35:10Z
2016-08-17T10:26:54Z
2016-08-17T10:26:53Z
NONE
null
Not sure if this is a bug, but it took me a long time to figure out what was going on in a much bigger datafile than the sample one below. #### Code Sample, a copy-pastable example if possible import pandas import StringIO data='''var1,var2,var3 1,2,0 2,\x00,0 3,4,0 4,5,0 ''' print pandas.read_csv(StringIO.StringIO...
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14,013
Rolling groupby should not maintain the by column in the resulting DataFrame
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10
2016-08-16T18:50:15Z
2020-02-20T14:14:13Z
2018-05-09T10:24:38Z
CONTRIBUTOR
null
I found another oddity while digging through #13966. Begin with the initial DataFrame in that issue: ``` df = pd.DataFrame({'A': [1] * 20 + [2] * 12 + [3] * 8, 'B': np.arange(40)}) ``` Save the grouping: ``` In [215]: g = df.groupby('A') ``` Compute the rolling sum: ``` In [216]: r = g.rolling(...
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171,501,126
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14,014
.groupby() .value_counts() incompatible with .reset_index() in 0.18.1
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2016-08-16T19:46:37Z
2016-08-16T20:43:04Z
2016-08-16T20:43:03Z
NONE
null
#### Code Sample ``` python df = pd.DataFrame([[0,1],[0,1],[0,2],[1,1]], columns=['a','b']) df a b 0 0 1 1 0 1 2 0 2 3 1 1 df.groupby('a').b.value_counts().reset_index() ValueError: cannot insert b, already exists ``` #### Expected Output In version 0.18.0, the output was: ``` python a b 0 0 0 1...
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14,015
BUG: multi-indexing sorting on axis=1 on >0 levels
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2016-08-16T21:50:27Z
2017-04-07T15:18:25Z
2017-04-07T15:18:24Z
NONE
null
In a DataFrame with MultiIndex, sorting on the level with date values does not do anything (order remains unchanged). This happens for both row and column indexes. In my case I am starting with a string index, converting that to datetime index, have not tried with datetime values at the start. #### Code Sample, a copy-...
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14,016
BUG: concat with categorical keys doesn't preserve categorical dtype
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2016-08-16T23:00:03Z
2019-10-21T19:52:16Z
null
CONTRIBUTOR
null
This is a follow-up issue to #13854. #### Code Sample, a copy-pastable example if possible ``` python cidx = pd.CategoricalIndex(['y', 'x'], categories=list("xyz"), ordered=True) df = pd.DataFrame([[10, 11, 12]]) pd.concat([df, df], keys=cidx).index.levels[0] Out[32]: Index(['y', 'x'], dtype='object') ``` #### Expect...
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171,542,622
MDU6SXNzdWUxNzE1NDI2MjI=
14,017
BUG: Inconsistency in make_axis_dummies (and/or Panel.to_frame()) with categorical index level
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3
2016-08-16T23:37:04Z
2019-10-14T00:39:14Z
2019-10-14T00:39:13Z
CONTRIBUTOR
null
`make_axis_dummies` has some problems with an axis containing a `CategoricalIndex` with extra categories. #### Code Sample, a copy-pastable example if possible ``` python # category `z` is not used cidx = pd.CategoricalIndex(list("xy"), categories=list("xyz")) df = pd.DataFrame([[10, 11]], columns=cidx) ldf = pd.Panel...
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https://api.github.com/repos/pandas-dev/pandas/issues/14018
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171,545,350
MDU6SXNzdWUxNzE1NDUzNTA=
14,018
BUG: unstack doesn't preserve categorical dtype
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10
2016-08-16T23:57:54Z
2021-05-17T15:17:30Z
2021-05-17T15:17:30Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ``` python idx = pd.MultiIndex.from_product([['A'], [0, 1]]) df = pd.DataFrame({'cat': pd.Categorical(['a', 'b'])}, index=idx) df Out[19]: cat A 0 a 1 b df.unstack() Out[21]: cat 0 1 A a b ``` Categorical dtype is lost: ``` python df.uns...
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https://api.github.com/repos/pandas-dev/pandas/issues/14019
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https://github.com/pandas-dev/pandas/pull/14019
171,570,854
MDExOlB1bGxSZXF1ZXN0ODE1ODE4NTE=
14,019
BUG: Parse NULL char as null value
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3
2016-08-17T04:15:09Z
2016-08-17T10:27:04Z
2016-08-17T10:26:54Z
MEMBER
null
Fixes bug in C parser in which the `NULL` character (`'\x00'`) was being interpreted as a true line terminator, escape character, or comment character because it was used to indicate that a user had not specified these values. As a result, if the data contains this value, it was being incorrectly parsed. It should be p...
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171,654,083
MDU6SXNzdWUxNzE2NTQwODM=
14,020
gbq.py: silently downcasting INTEGER columns to FLOAT is problematic
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4
2016-08-17T13:14:35Z
2017-02-09T17:11:31Z
2017-02-09T17:11:31Z
NONE
null
In many cases INTEGER columns in bigquery are used to store IDs. Such IDs are then likely to be silently corrupted on conversion to dataframe. There seems no good way around this, even if it's clear a priori that the query result will only return non-null INTEGER columns. I understand the motivation (the ability to r...
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https://api.github.com/repos/pandas-dev/pandas/issues/14021
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171,664,159
MDU6SXNzdWUxNzE2NjQxNTk=
14,021
Better error message when fillna is used with NaN with category dtype
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2
2016-08-17T13:56:40Z
2016-08-26T20:50:24Z
2016-08-26T20:50:24Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ``` import numpy as np tst = pd.DataFrame({'a':[1,2,1,np.nan],'b':[np.nan, np.nan, np.nan, np.nan]}, dtype='category') tst.fillna(value=tst.median()) # here second column median is evaluated to np.nan ``` and the result is: ``` ----------------------------------...
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171,675,171
MDU6SXNzdWUxNzE2NzUxNzE=
14,022
wrong addition between Series of type datetime64 and timedelta when tz is set and different from UTC
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2016-08-17T14:39:35Z
2016-08-18T06:55:11Z
2016-08-17T18:55:23Z
CONTRIBUTOR
null
It seems there is an issue when adding a timedelta to a Series of type datetime64[ns, some tz]. There seems to be an issue with the offset/DST. #### Code Sample, a copy-pastable example if possible ``` import pandas sr = pandas.Series(pandas.DatetimeIndex(["2016-11-03 16:00:00+01:00", "2016-10-25 17:00:00+02:00"]).tz...
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171,725,517
MDU6SXNzdWUxNzE3MjU1MTc=
14,023
Feature request: Save Jupyter rendering of pd.DataFrame as a .png or .pdf
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5
2016-08-17T18:18:22Z
2019-05-20T00:27:59Z
2016-08-17T21:26:57Z
NONE
null
I've been screenshotting the dataframes from Jupyter in my notes but it would be really cool if you could save the actual renderings. I looked it up and I think this guy figured out how to do it http://stackoverflow.com/questions/19726663/how-to-save-the-pandas-dataframe-series-data-as-a-figure Feature request: DF...
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171,749,128
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14,024
BUG: Truncated "Y" conversion with to_timedelta
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2016-08-17T20:11:46Z
2017-05-12T16:25:19Z
2017-05-12T16:25:18Z
CONTRIBUTOR
null
When converting a fractional year to a `Timedelta` object the float is truncated: ``` print pd.to_timedelta(1., unit='Y') 365 days 05:49:12 print pd.to_timedelta(1.5, unit='Y') 365 days 05:49:12 print pd.to_timedelta(0.5, unit='Y') 0 days 00:00:00 print pd.to_timedelta(0.9, unit='Y') 0 days 00:00:00 ``` Using a fl...
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171,793,239
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14,025
TST: Fix test_coercion for period dtype
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2
2016-08-18T00:46:19Z
2016-08-18T10:00:32Z
2016-08-18T10:00:32Z
MEMBER
null
- [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` fix test to meet period dtype #13941.
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14,026
ENH: Add groupby().ngroup() method to count groups (#11642)
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22
2016-08-18T01:44:22Z
2017-06-04T17:02:55Z
2017-06-01T22:12:15Z
CONTRIBUTOR
null
This basically adds a method to give access to the coding returned by `grouper.group_info[0]`, i.e. the number of the group that each row is in. This is a natural parallel to cumcount(), and while it's not the world's most important feature it's come in handy for me from time to time and deserves a public method, IMHO...
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171,807,033
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14,027
BUG: Categoricals shouldn't allow non-strings when object dtype is passed (#13919)
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2016-08-18T02:55:24Z
2016-08-19T12:41:42Z
2016-08-18T03:27:20Z
CONTRIBUTOR
null
- [ ] closes #13919 - [ ] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry **Why this change is needed:** Categorical variables are by definition single types, so to allow them to take on various different kinds of values is misleading. Object dtypes should only be allo...
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171,812,048
MDExOlB1bGxSZXF1ZXN0ODE3NTMxNDE=
14,028
BUG: read_fwf inference should respect skiprows (#11256)
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6
2016-08-18T03:47:55Z
2017-01-10T13:19:30Z
2017-01-10T13:18:21Z
CONTRIBUTOR
null
Fix the fact that we don't skip the rows when inferring colspecs by passing skiprows down the chain until it's needed. - [X] closes #11256 - [X] 3 tests added / passed - [X] passes `git diff upstream/master | flake8 --diff` - [X] whatsnew entry
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171,828,155
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14,029
proposal: new sorting order for columns
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3
2016-08-18T06:38:00Z
2016-08-19T02:07:49Z
2016-08-18T10:04:45Z
NONE
null
when I want to sort one of the columns with a specific order, there is the only way to do this right now. example, we have this dataframe ``` python import pandas as pd df = pd.DataFrame({'good': [10], 'excellent': [20], 'bad': [10]}) df.head() bad excellent good 0 10 20 10 ``` and If I want to sort...
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14,030
DOC: update docs for read_csv().na_values and keep_default_na
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9
2016-08-18T08:05:13Z
2016-08-22T05:56:42Z
2016-08-20T13:25:01Z
CONTRIBUTOR
null
- [x] closes #13967 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [ ] whatsnew entry
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171,841,164
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14,031
Require a problem description in PRs
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12
2016-08-18T08:05:49Z
2016-11-25T14:40:49Z
2016-11-25T14:40:49Z
CONTRIBUTOR
null
A lot of time I can't find out why a change in a commit was made because it either has no proper commit message or the commit message just says what was changed, but not why. Add text to the PR template to require such a problem description, so that one can comprehend why a change was made even years later.
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14,032
Require a problem description in issues
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6
2016-08-18T08:19:38Z
2016-12-14T16:45:20Z
2016-11-18T22:54:23Z
CONTRIBUTOR
null
Currently some issues are just code examples without a description **why** a change should be done. This leads to problems when (years later) the current behaviour is questioned and no one can remember why it was changed.
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14,033
BUG: Outer join on multiple date time columns results in nan keys
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5
2016-08-18T09:31:23Z
2016-08-18T11:38:20Z
2016-08-18T10:33:13Z
NONE
null
I have tried to reduce this problem as small as possible, two data frames attached each with 291 rows. [pickles.zip](https://github.com/pydata/pandas/files/424538/pickles.zip) ``` df1 = pd.read_pickle('df1.pkl') df2 = pd.read_pickle('df2.pkl') merged = df1.merge(df2, how='outer', on=['DateTime', 'valid_datetime']) #...
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14,034
tz_localize issue within DatetimeTZBlock
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1
2016-08-18T14:01:10Z
2016-08-18T14:39:13Z
2016-08-18T14:38:51Z
CONTRIBUTOR
null
Using the .where operation on a localized DataFrame Column may raise an exception due to a failure to tz_localize the result of the operation in DatetimeTZBlock #### Code Sample, a copy-pastable example if possible ``` import pandas import pytz TZ = pytz.timezone("Europe/Brussels") # TZ = None # <== with TZ = None, ...
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14,035
BUG: #14016. Preserve categorical keys through concat
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7
2016-08-18T15:08:37Z
2017-05-13T21:36:48Z
2017-05-13T21:36:48Z
CONTRIBUTOR
null
- [x] closes #14016 - [x] tests added / passed - [ ] passes `git diff upstream/master | flake8 --diff` - [ ] whatsnew entry
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14,036
0.18.1 to_csv ignoring columns argument
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2016-08-18T18:11:19Z
2016-08-18T20:27:07Z
2016-08-18T18:55:56Z
NONE
null
The issue discussed [here](https://github.com/pydata/pandas/issues/3454) is occurring for me in 0.18.1: The columns optional argument of to_csv is being ignored.
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14,037
DOC: unpin IPython version (GH13639)
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2016-08-18T20:55:34Z
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14,038
BUG: iloc fails with non lex-sorted MultiIndex #13797
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2016-08-19T01:34:07Z
2018-08-24T09:18:30Z
2016-09-13T22:25:32Z
CONTRIBUTOR
null
- [x] closes #13797 - [x] tests added / passed pandas/tests/test_multilevel.py - [x] passes `git diff upstream/master | flake8 --diff` - [ ] whatsnew entry corrected how iloc handles tuple-keys for multiindex
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CLN: Removed DataFrame.to_wide
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2016-08-19T02:26:41Z
2016-08-19T21:37:45Z
2016-08-19T21:36:29Z
MEMBER
null
`to_wide` was deprecated since 2011 (https://github.com/pydata/pandas/commit/1134c9f6c40398d8eba37c312c88ce294e31c6c5) xref https://github.com/pydata/pandas/issues/13777 No tests for this deprecation beforehand to remove :disappointed:
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BUG: dataframe concat method error when using join='inner'
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1
2016-08-19T02:50:53Z
2016-08-19T10:08:54Z
2016-08-19T10:08:21Z
NONE
null
#### Code Sample, a copy-pastable example if possible ``` df1 = pd.DataFrame(np.arange(9).reshape(3, 3), columns=['a', 'b', 'c']) df3 = pd.DataFrame(np.arange(20, 26).reshape(3, 2), columns=['a', 'd'], index=[2, 3, 4]) pd.concat([df1, df3], axis=1, join='inner') a b c a d 0 0 1 2 NaN NaN 1 3 4 5 NaN Na...
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14,041
CLN: Drop lags parameter from Panel.shift
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2016-08-19T06:00:38Z
2016-08-19T09:02:54Z
2016-08-19T09:02:46Z
MEMBER
null
Title is self-explanatory. xref #6928
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numpy.split on non-UTC, tz-aware data undergoes UTC roundtrip
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2016-08-19T07:04:29Z
2020-03-21T20:19:05Z
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#### Code Sample, a copy-pastable example if possible ``` import pandas as pd import numpy as np indices = pd.date_range('2016-01-01 00:00:00+0200', freq='S', periods=10) np.split(indices, indices_or_sections=[]) Out: [DatetimeIndex(['2015-12-31 20:00:00+02:00', '2015-12-31 20:00:01+02:00', '2015-12-31 ...
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TypeError: 'NoneType' object is not callable
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2016-08-19T07:55:36Z
2019-10-07T01:34:07Z
2019-10-07T01:34:07Z
NONE
null
When running the 0.18.1 self tests with python-3.5.2 on NetBSD, I see a couple of test failures. One is tracked in #12337, here's the log for the others: ``` ====================================================================== ERROR: test_secondary_kde (pandas.tseries.tests.test_plotting.TestTSPlot) ---------------...
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BUG: DataFrame.to_records() bug in converting datetime64 index
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2016-08-19T09:21:24Z
2016-10-18T12:31:50Z
2016-10-18T12:31:50Z
CONTRIBUTOR
null
BUG: DataFrame.to_records() bug in converting datetime64 index with timezone #13937
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14,045
unique docstring extend #13565 unique datetime tz issue
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4
2016-08-19T10:27:52Z
2016-08-21T14:15:14Z
2016-08-19T10:29:32Z
NONE
null
closes #13565 whatsnew extended doc string for unique addressing the issue with timezone aware datetimes ( see #13565 )
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172,114,854
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14,046
DOC: add data_columns to doc string of to_hdf and HDFStore.append
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4
2016-08-19T11:52:41Z
2016-08-19T21:00:26Z
2016-08-19T20:41:37Z
MEMBER
null
Follow-up of #13951, rebase of PR #13065
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172,126,957
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14,047
BUG: Categoricals shouldn't allow non-strings when object dtype is passed (#13919)
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13
2016-08-19T13:04:32Z
2016-09-13T22:55:03Z
2016-09-11T20:26:01Z
CONTRIBUTOR
null
- [ ] closes #13919 - [ ] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry **Why this change is needed:** Categorical variables are by definition single types, so to allow them to take on different types of values is misleading. Object dtypes should only be allowed whe...
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14,048
BUG/API PeriodIndex handles int list/array differently
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4
2016-08-19T13:42:54Z
2018-10-25T13:33:20Z
2018-10-25T13:33:15Z
MEMBER
null
When we pass a list of numbers, it parsed as date as it is. The same values is regarded as `ordinal` if it is passed as an array. #### Code Sample, a copy-pastable example if possible ``` raw = [2005, 2007, 2009] pd.PeriodIndex(raw, freq='A') # PeriodIndex(['2005', '2007', '2009'], dtype='period[A-DEC]', freq='A-DEC'...
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172,153,378
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14,049
Partial datetime indexing of Multiindex by year only
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5
2016-08-19T15:09:14Z
2016-08-20T13:09:47Z
2016-08-20T13:09:35Z
NONE
null
I have DataFrame: ``` import pandas as pd import numpy as np rng = pd.date_range('01-01-1988',periods=130000,freq='H') long_df = pd.DataFrame(np.random.randn(130000,4),index = rng, columns=['bar','baz','foo','zoo']) dfmi = long_df.stack().sort_index() ``` --- ``` print (dfmi) 1988-01-01 00:00:00 bar -1.129213 ...
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14,050
verbose = False cause to_gbq() to fail
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1
2016-08-19T19:39:00Z
2016-08-19T20:44:48Z
2016-08-19T20:44:27Z
NONE
null
total_rows is only set in to_gbq() if verbose = True. If verbose = False, it is reference before assignment. #### Code Sample, a copy-pastable example if possible data.to_gbq('ANYTABLE',project_id ='ANYPROJECT',verbose = False,if_exists = 'append') 'UnboundLocalError: local variable 'total_rows' referenced before as...
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14,051
BUG: Dataframe.fillna with np.nan for dtype=category(GH 14021)
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2016-08-19T22:13:18Z
2016-11-15T22:20:35Z
2016-08-26T20:50:24Z
CONTRIBUTOR
null
- [x] closes #14021 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry
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14,052
Inconsistent .values for tz-aware columns
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34
2016-08-20T14:05:04Z
2019-07-05T00:46:58Z
2019-07-05T00:46:58Z
CONTRIBUTOR
null
When getting the values of a dataframe with multiple columns with a single type datetime64[ns,UTC], it returns a numpy array with dtype=object instead of dtype=datetime64[ns,UTC]. When returning a single column with dtype=datetime64[ns,UTC] or returning a multiple columns of dtype=datetime64[ns] (ie without tz), it wor...
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14,053
BUG: GH11847 Unstack with mixed dtypes coerces everything to object
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2016-08-20T14:45:54Z
2016-12-10T15:38:17Z
2016-12-10T15:38:14Z
CONTRIBUTOR
null
- [x] closes #11847 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry Changed the way in which the original data frame is copied (dropped use of .values, since it does not preserve dtypes).
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14,054
keep consistency in calling to_csv either dataframe or series
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2
2016-08-20T17:09:15Z
2016-08-24T23:28:45Z
2016-08-24T23:28:45Z
NONE
null
When I call to_csv of dataframe object, I am not required to explicitly set path parameter. The default one is None and will return a string. I thought the same thing for series object. This time the path parameter becomes explicitly required. I wonder if it is better to keep consistency between them.
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172,283,084
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14,055
BUG: Don't error when usecols is a numpy array
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3
2016-08-20T18:06:24Z
2016-08-21T14:18:05Z
2016-08-21T14:17:47Z
MEMBER
null
Converts `usecols` to a `set` just like we do on the C engine side. Closes #12546.
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14,056
BUG, DOC: Fix inconsistencies with scalar na_values in read_csv
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4
2016-08-21T02:56:25Z
2016-08-21T19:34:47Z
2016-08-21T19:34:41Z
MEMBER
null
1) Update documentation to state that scalars are accepted for `na_values` 2) Accept scalars for the values when a dictionary is passed in for `na_values` Closes #12224.
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14,057
TST/CLN: some RunTimeWarnings
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8
2016-08-21T13:40:55Z
2021-05-01T23:20:10Z
2021-05-01T23:20:10Z
CONTRIBUTOR
null
after #13145 some RunTimeWarnings remain in the codebase. We should look at these and silence (using `np.errstate`), or fix if we are testing something odd. (running the full test suite will show these; I have extracted them, some are showing a level too low in the stack). - [ ] `pandas/pandas/tseries/index.py:526: Run...
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14,058
Categorical.from_codes should validate ordered argument
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2
2016-08-21T14:11:36Z
2016-08-21T19:53:49Z
2016-08-21T19:53:49Z
CONTRIBUTOR
null
I ran into this when I accidentally passed my codes to the `ordered` argument #### Code Sample, a copy-pastable example if possible ``` python In [2]: pd.Categorical.from_codes([0, 0, 1], categories=['a', 'b', 'c'], ordered=np.array([0, 1, 2])) Out[2]: ------------------------------------------------------------------...
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14,059
BUG: Validate the ordered parameter for Categorical
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3
2016-08-21T17:39:12Z
2016-08-21T19:59:15Z
2016-08-21T19:53:49Z
MEMBER
null
Title is self-explanatory. Closes #14058.
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14,060
Fix/read csv utf aliases
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4
2016-08-21T20:45:32Z
2016-08-22T20:51:44Z
2016-08-22T20:47:18Z
CONTRIBUTOR
null
- [x] closes #13549 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry -read_csv with engine=c throws error when encoding=UTF_16 (anything other than utf-16) -improved nosetests and moved to in pandas/io/tests/common.py -passes `pep8radius upstream/master --diff` a...
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ENH: add parameter to to_html for HTML border
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2016-08-22T00:53:20Z
2017-04-05T02:08:04Z
2016-08-31T08:07:31Z
CONTRIBUTOR
null
Closes https://github.com/pydata/pandas/issues/11563 Previously this was hardcoded to `<table border="1" ...>`. Now we allow an option to `to_html`. The only controversial bit here may be the option. I really don't like having options control output, but given that this is essentially a repr I think it's OK. It's als...
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WIP: add sort_levels to MultiIndex.from_product
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2016-08-22T01:55:01Z
2016-11-16T21:29:30Z
2016-11-16T21:29:30Z
MEMBER
null
Currently, `from_product` always sorts levels in the resulting MultiIndex. This means that the result does not necessarily have lexsorted labels/codes. This PR adds an option to not sort levels when calling `from_product`. Using this option yields a few benefits: 1. It's simpler -- resulting levels on the MultiIndex a...
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BUG: Align to_csv signatures with DataFrame and Series
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2
2016-08-22T03:56:09Z
2016-08-24T23:28:49Z
2016-08-24T23:28:45Z
MEMBER
null
Default `path=None` in `Series.to_csv()` for consistency with `DataFrame.to_csv()`. Closes #14054.
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172,469,840
MDExOlB1bGxSZXF1ZXN0ODIyMDI5NDE=
14,064
BUG: fix read_gbq lost precision for longs above 2^53 and floats above 10k
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30
2016-08-22T14:39:57Z
2017-02-09T17:12:17Z
2017-02-09T17:11:31Z
NONE
null
fixes: - lost precision for longs above 2^53 - and floats above 10^4 Also contains `test_gbq.py` clean up - [x] closes #14020, #14305 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] updated docs - [x] whatsnew entry
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172,533,704
MDU6SXNzdWUxNzI1MzM3MDQ=
14,065
Unicode char as delimiter won't use C engine
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7
2016-08-22T19:27:03Z
2016-08-31T16:10:31Z
2016-08-31T16:10:31Z
NONE
null
I have the following code: `dfEL = pd.read_csv(IN_PATH, delimiter='\\u00A7', encoding='utf-8')` which I've also tried with other ways of writing the delimiter, e.g.: `dfEL = pd.read_csv(IN_PATH, delimiter='§', encoding='utf-8')` These other methods don't work, and generate a `UnicodeDecodeError: 'utf-8' codec can't...
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172,562,229
MDU6SXNzdWUxNzI1NjIyMjk=
14,066
read_csv: European numbers do not work with dates
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2016-08-22T21:42:16Z
2016-09-13T19:45:06Z
2016-08-27T13:31:30Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible Using the following reader leads to omission of the dates resulting in no index: ``` file_, index_col=0, header=4, sep=';', quoting=1, parse_dates=True, encoding='latin-1', dayfirst=True, # decimal=',', tho...
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172,571,818
MDU6SXNzdWUxNzI1NzE4MTg=
14,067
to_sql: Does not produce a hierarchical index when using SQLAlchemy as the dbAPI
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2016-08-22T22:38:26Z
2020-05-16T03:46:56Z
null
NONE
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Based on this post here: http://stackoverflow.com/questions/39089513/pandas-sqlalchemy-engine-does-not-produce-hierarchical-index-but-legacy-mode-do #### data ('test.csv'): ``` AlignmentId,Classifier,Value aln1,classifier1,True aln1,classifier2,False aln2,classifier1,True ``` #### Sample code: ``` import pandas as p...
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MDU6SXNzdWUxNzI1NzY1NDI=
14,068
TimedeltaIndex + Timestamp -> no overflow error
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3
2016-08-22T23:11:42Z
2016-09-27T10:43:45Z
2016-09-27T10:43:45Z
CONTRIBUTOR
null
When adding a TimedeltaIndex and a Timestamp this overflows instead of raising (pydata/xarray#975). ``` import pandas as pd # overflow error (correct) pd.to_timedelta(106580, 'D') + pd.Timestamp('2000') # no overflow error (?) pd.to_timedelta([106580], 'D') + pd.Timestamp('2000') ``` #### output of `pd.show_versions(...
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14,069
TST: Add tests for internal EOF in read_csv
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2
2016-08-23T02:13:48Z
2016-08-24T23:27:49Z
2016-08-24T23:27:45Z
MEMBER
null
Title is self-explanatory. Closes #5500.
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14,070
DatetimeIndex.to_period does not support multiple of frequencies
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4
2016-08-23T04:50:53Z
2021-05-01T23:21:41Z
null
CONTRIBUTOR
null
The code below is the simplest way I found to "snap" a DateTimeIndex to some "frequency" (is there any better way?). I would have expected the to_period method to work as flexibly as the resample method that accepts any rule (like 15T, 2H, ...) but the to_period method does not appear to handle properly multiples of f...
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14,071
DatetimeIndex periods: Change in behavior between 0.17.1 and 0.18.0
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1
2016-08-23T12:05:58Z
2016-08-24T23:26:32Z
2016-08-24T23:26:10Z
NONE
null
This is not necessarily a bug, but a change in behavior that could not find reported elsewhere. ``` python import pandas as pd,datetime as dt pd.DatetimeIndex(freq=pd.tseries.offsets.DateOffset(months=6),end=dt.date(2016,1,1), closed='right',periods=3) ``` In version 0.17.1 you get ``` python DatetimeIndex(['2015-07...
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14,072
pivot_table margins bottom-left total does not correspond to other content when dropna=False
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2016-08-23T15:07:00Z
2016-09-13T22:10:38Z
null
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#### Code Sample, a copy-pastable example if possible In: M = pd.DataFrame([ [1, 'a', 'A'], [1, 'b', 'B'], [1, 'c', None]], columns=['x', 'y', 'z']) P = M.pivot_table(values='x', index='y', columns='z', aggfunc='sum', fill_value=0, margins=True,...
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14,073
DOC: split docstring into multiple lines in excel.py
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2016-08-23T18:36:41Z
2016-09-15T14:59:32Z
2016-09-15T14:59:32Z
CONTRIBUTOR
null
- [x] closes #13967 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [ ] whatsnew entry A follow-up on #14030. Not sure whether this is the good way to do it - this seems too verbose. I will add it to `parsers.py` or move it to `common.py` once it's done. I also thought about mov...
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14,074
Pandas does not respect shared axes in matplotlib
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2016-08-23T22:55:13Z
2021-05-01T23:24:00Z
null
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible x axis truncated by second call ``` ser1 = pd.Series({0:1, 1:2, 2:3}) ser2 = pd.Series({0:.5, 1:.1}) _, axes = plt.subplots(1, 2, sharex=True, sharey=True) ser1.plot(ax=axes[0]) ser2.plot(ax=axes[1]) ``` ![image](https://cloud.githubusercontent.com/assets/61613...
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14,075
add utility methods get_groups() and iter_groups() to class _GroupBy
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2016-08-24T02:32:16Z
2016-08-25T01:45:10Z
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `git diff upstream/master | flake8 --diff` - [ ] whatsnew entry added utility methods get_groups() and iter_groups() to groupby objects
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14,076
pandas merge appear non-existent value the column b should not have value '1'
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2016-08-24T04:01:57Z
2016-11-30T20:20:13Z
null
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#### Code Sample, a copy-pastable example if possible t = [1, 2, 3, 4, 5] tt = [2, 3, 4, 5, 7] d1 = DataFrame(t, columns=['a'], index=t) d2 = DataFrame(tt, columns=['b']) r = pd.merge(d1, d2, how='left', left_index=True, right_on='b', copy=False) print(r) pd.show_versions() #### Expected Output /usr/local/Cellar...
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14,077
BUG: Don't parse index column as numeric when parse_dates=True
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2016-08-24T07:57:28Z
2016-08-27T13:31:37Z
2016-08-27T13:31:30Z
MEMBER
null
When a thousands parameter is specified, if the index column data contains that thousands value for date purposes (e.g. '.'), do not interpret those characters as the thousands parameter. Closes #14066.
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14,078
groupby aggregate: class as `arg` value
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2
2016-08-24T13:03:49Z
2016-08-25T10:14:42Z
2016-08-24T22:42:24Z
NONE
null
Feature request: it would be nice if `aggregate` allowed classes as an argument, using its constructor as the function to aggregate by. In the code sample it recognises `frozenset` as an iterable because it happens to have such an instance method. I'd suggest a check like: ``` python >>> inspect.isclass(frozenset) Tr...
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14,079
Improve poor performance of groupby resampling
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2016-08-24T15:48:46Z
2021-05-25T01:56:58Z
2016-08-24T22:56:36Z
NONE
null
When trying to resample transactions data where there are infrequent transactions for a large number of people, I get horrible performance. Compare the function annualize with the clunkier but faster annualize2 below. Ideally resample should be able to handle multiindex data and resample on 1 of the dimensions without ...
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14,080
Adding big offset to timedelta generates a python crash
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2016-08-24T15:59:39Z
2018-11-18T21:56:56Z
2018-11-18T21:56:56Z
NONE
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#### Code Sample, a copy-pastable example if possible ##### In: ``` import pandas as pd from pandas.tseries.frequencies import to_offset d = pd.Timestamp("2000/1/1") d + to_offset("D")*100**25 ``` ##### Out: **=> python crash** Fatal Python error: Cannot recover from stack overflow. Current thread 0x00002b00 (most...
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14,081
ValueError plotting bar plot from DataFrame with existing Axes
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2016-08-24T16:11:21Z
2016-08-24T16:37:11Z
2016-08-24T16:34:25Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible The following code works, and when pasted in a Jupyter Notebook or QT console yields the expected bar plot: ``` python %matplotlib inline import pandas as pd import matplotlib.pyplot as plt # Create some data to plot df = pd.DataFrame( dict(Feature1=[10, ...
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14,082
DataFrame construction breaks python on numpy empty_like
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2016-08-24T17:41:43Z
2016-08-24T17:53:38Z
2016-08-24T17:53:11Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible http://stackoverflow.com/questions/39129419/why-does-dataframe-construction-break-python-on-numpy-empty-like ``` import numpy as np import pandas as pd a = np.array([None, None], dtype=object) print(a) # [None None] dfa = pd.DataFrame(a) print(dfa) # ...
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173,063,525
MDU6SXNzdWUxNzMwNjM1MjU=
14,083
Enabling auto-collapsing of Excel dumped from df
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2016-08-24T21:33:58Z
2016-08-25T21:46:21Z
null
NONE
null
Dear all, In my job, we use a lot of Pandas (though not always very professionally). One very useful case is to build a dataframe conatining data from several instruments for several items. I tend to use a lot of multi-indexing columns. In order to view (and modify) the columns, we like to save the dataframe in an Exc...
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14,084
resample drops dtype('O') columns from DataFrame (but not Series)
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2016-08-24T22:25:55Z
2016-08-31T23:34:57Z
2016-08-24T22:36:50Z
NONE
null
#### Code Sample, a copy-pastable example if possible ``` python import numpy import pandas as pd idx = pd.date_range('1/1/2016', periods=100, freq='d') z = pd.DataFrame({"z": numpy.zeros(len(idx))}, index=idx) obj = pd.DataFrame({"obj": numpy.zeros(len(idx), dtype=numpy.dtype('O'))}, index=idx) nan = pd.DataFrame({...
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14,085
TST/DOC: apply date() with timezones
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2016-08-25T00:24:10Z
2016-08-25T22:20:22Z
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CONTRIBUTOR
null
- [x] closes #11757 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [ ] whatsnew entry
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14,086
ERR: in python >= 3.5 use FileNotFoundError instead of OSError
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2016-08-25T08:57:01Z
2016-09-01T08:19:15Z
2016-09-01T08:19:15Z
NONE
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Simple to reproduce: ``` python import pandas as pd try: pd.read_csv('this_file_does_not_exist.csv') except FileNotFoundError: print('This should execute.') ``` Instead, I get an OSError, which tells me in text that `OSError: File b'this_file_does_not_exist.csv' does not exist`. https://docs.python.org/3.5/l...
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14,087
Adding datetime.timedelta to Series breaks via .add() but works via addition
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2016-08-25T19:42:39Z
2016-08-25T20:40:09Z
2016-08-25T19:55:50Z
NONE
null
Adding a datetime.timedelta to a series of datetime64[ns, UTC] breaks when using the Series .add(offset) method, but works when doing series + offset. This behaviour seems unexpected to me. Furthermore, adding a pd.Timedelta drops timezone. ``` python import pandas as pd import datetime import pytz datetime_series =...
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14,088
Cannot subtract tz-aware datetime.datetime from tz-aware datetime64 series.
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2016-08-25T19:46:12Z
2016-09-08T10:35:49Z
2016-09-08T10:35:40Z
NONE
null
#### Code Sample, a copy-pastable example if possible ``` python import pytz import datetime import pandas as pd foo = pd.Series(datetime.datetime(2016, 8, 23, 12, tzinfo=pytz.utc)) foo - datetime.datetime(2016, 8, 22, 12, tzinfo=pytz.utc) --------------------------------------------------------------------------- V...
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14,089
df.ix causing exception when index is not from 0
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2016-08-25T22:46:31Z
2016-08-26T10:20:20Z
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NONE
null
#### Code Sample, a copy-pastable example if possible When the index is set from 0, df.ix[0,0] works fine. ``` >>> df = pd.DataFrame({'A':[1,2,3], 'B':[10,20,30]},index=[0,1,2]) >>> df A B 0 1 10 1 2 20 2 3 30 >>> df.ix[0,1] 10 ``` When the index is set from other 0, df.ix[0,0] cases exception. ``` >>> d...
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14,090
BUG: fix tz-aware datetime convert to DatetimeIndex (GH 14088)
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2016-08-26T10:41:20Z
2016-09-08T10:35:56Z
2016-09-08T10:35:41Z
CONTRIBUTOR
null
- [x] closes #14088 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry
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14,091
Can't install pandas-0.18.1
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2016-08-27T15:59:25Z
2016-08-27T15:21:00Z
NONE
null
Try to install pandas via pip, but it is failed: [error.txt](https://github.com/pydata/pandas/files/439154/error.txt)
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14,092
BUG: Float64Index.get_value() for tuples.
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2016-08-26T18:19:55Z
2016-08-26T20:21:45Z
2016-08-26T20:21:02Z
CONTRIBUTOR
null
- [x] closes #13509 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry Currently, trying to retrieve one tuple-valued entry in a `Series` with a `Float64Index` will fail (GH 13509). This fixes that bug.
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14,093
ERR: stricter checks on Index construction when tz is passed
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2016-08-26T19:28:18Z
2020-12-22T23:45:29Z
2020-12-22T23:45:29Z
CONTRIBUTOR
null
from [comment](https://github.com/pydata/pandas/pull/13981#issuecomment-239846027) on #13981 ``` In [1]: pd.Index([datetime.datetime(2012,1,1), datetime.datetime(2012,1, 2)], tz="Europe/Brussels") Out[1]: DatetimeIndex(['2012-01-01 00:00:00+01:00', '2012-01-02 00:00:00+01:00'], dtype='datetime64[ns, Europe/Brussels]'...
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14,094
CLN: What is the purpose of datetools.py?
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2016-08-27T03:58:40Z
2016-09-07T13:16:02Z
2016-09-07T13:16:02Z
MEMBER
null
The doc-string at the top of <a href="https://github.com/pydata/pandas/blob/0e61847e111a3ba181f16c8b9b974c74d360ad2e/pandas/core/datetools.py">datetools.py</a> seems to indicate this is just a hodge-podge of datetime-related objects. Seems like that could be cleaned up unless there is good reason to have it.
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14,095
BUG: resolvers in pandas.eval should accept list-like
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4
2016-08-27T05:33:15Z
2016-08-31T16:05:06Z
2016-08-31T16:05:06Z
CONTRIBUTOR
null
I think the resolvers argument of pandas.eval requires a tuple and not a list ``` resolvers : list of dict-like or None, optional A list of objects implementing the __getitem__ special method that you can use to inject an additional collection of namespaces to use for variable lookup. For example, this is used in the ...
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DEPR: Deprecated Index.to_datetime
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2016-08-27T06:02:54Z
2016-08-27T16:30:47Z
2016-08-27T09:21:45Z
MEMBER
null
Deprecates both `Index.to_datetime` and `DatetimeIndex.to_datetime` in favor of `pd.to_datetime`. Partially addresses #8254. Closes #5612 because `pd.to_datetime` does have a `format` argument.
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14,097
Added consistent pandas imports in io documentation
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2016-08-27T11:36:01Z
2016-08-29T12:24:35Z
2016-08-29T12:24:29Z
CONTRIBUTOR
null
Partially addresses #9886
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DOC: Improved links between expanding and cum* (GH12651)
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2016-08-27T12:39:10Z
2016-12-14T14:57:41Z
2016-12-14T14:54:21Z
CONTRIBUTOR
null
- [x] closes #12651 - [x] passes `git diff upstream/master | flake8 --diff`
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CLN/PERF: clean-up of the benchmarks
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2016-08-27T15:53:54Z
2016-12-10T14:33:32Z
2016-12-10T14:30:31Z
MEMBER
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Related to https://github.com/pydata/pandas/issues/10849 (similar to https://github.com/pydata/pandas/pull/10998) Just putting this up, was doing some time ago, but not yet fully ready, and thought to already merge this (if the content is OK) to not get too much conflicts. Gist: removing redundancy by gathering tests...
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COMPAT/BLD: int dtype in json tests
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2016-08-27T16:01:08Z
2016-08-28T13:14:59Z
2016-08-28T13:14:55Z
CONTRIBUTOR
null
Fixes failing windows build https://ci.appveyor.com/project/jreback/pandas-465/build/job/p8hju341jyhnkogc
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14,101
DEPR: Deprecate Timestamp.to_datetime
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2016-08-27T17:51:19Z
2016-08-29T12:42:52Z
2016-08-29T12:42:43Z
MEMBER
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1) Deprecate `NaT.to_datetime` 2) Deprecate `Timestamp.to_datetime` 3) Issue `UserWarning` in `Timestamp.to_datetime` when nanoseconds is non-zero `NaT` is also a `_Timestamp`, so the second deprecation covered the first one as well. Closes #8254.
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14,102
No labels on X-axis on charts with secondary_y=True
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2016-08-27T20:51:53Z
2016-08-29T12:27:11Z
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NONE
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#### Code Sample, a copy-pastable example if possible ``` #!/usr/bin/env python3 import matplotlib.pyplot as plt import pandas as pd # some data s1 = pd.Series(data=[5,7,6,8,7], index=[1,2,3,4,5]) s2 = pd.Series(data=[6,4,5,3,4], index=[1,2,3,4,5]) ax = plt.subplot(2, 1, 1) s1.plot(ax=ax) s2.plot(ax=ax, secondary_y=...
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14,103
pandas sort_values significantly slower on Python 3.5.2 vs. Python 2.7.12
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2016-08-28T00:08:49Z
2016-08-28T13:06:06Z
2016-08-28T13:05:43Z
NONE
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#### Code Sample, a copy-pastable example if possible import pandas as pd import numpy as np from time import time import sys df_data = pd.DataFrame(np.random.randint(0,int(1e6),int(20e6)), columns=['pop_id']) df_data['PL_dB'] = 50 + np.random.random(df_data.shape[0]) \* 100 df_data['Rx_dBm'] = 23 - df_data.PL_dB df_...
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14,104
first/last converts datetime into float
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2016-08-28T02:18:43Z
2016-08-28T13:11:55Z
2016-08-28T13:11:39Z
NONE
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#### Code Sample, a copy-pastable example if possible ``` import pandas as pd df = pd.DataFrame({'a': [1, 1, 2, 2], 'b': pd.to_datetime(['a', 'a', '12-23-2015', '12-24-2015'], errors='coerce')}) df.groupby('a').b.first().dtype ``` #### Expected Output last line is supposed to show datetime64[ns] bu...
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173,634,787
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14,105
DEPR: Deprecate pandas.core.datetools
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27
2016-08-28T07:54:54Z
2016-09-07T13:24:30Z
2016-09-07T13:16:02Z
MEMBER
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Title is self-explanatory. Closes #14094.
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14,106
MultiIndex with dateutil tzlocal data corruption
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2
2016-08-28T09:05:12Z
2016-08-28T13:20:14Z
2016-08-28T13:14:10Z
NONE
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#### Code Sample, a copy-pastable example if possible ``` In [1]: %paste import datetime from dateutil.tz import tzlocal, tzutc import pandas d = { datetime.datetime(2016, 8, 26, 20, 23, tzinfo=tzlocal()): { 'A': 10481.0, 'B': 12, 'C': 'text' }, datetime.datetime(2016, 8, 26, 20, 2...
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14,107
pandas.core.groupby.SeriesGroupBy.hist doesn't propagate **kwargs
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2016-08-28T11:11:42Z
2021-05-01T23:26:12Z
2021-05-01T23:26:11Z
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When calling `my_groupby.hist(bins=8, histtype='stepfilled')` I would expect the same behavior as when calling `my_series.hist(bins=8, histtype='stepfilled')` separately for each of the groups. However, while the 'bins' parameter is taken into account, the 'histtype' parameter is ignored and not passed along to matplot...
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