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13,804
CLN: Removed the kwds param in to_csv
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2016-07-26T15:21:51Z
2016-07-29T07:56:37Z
2016-07-29T07:56:20Z
MEMBER
null
We aren't using it anymore with the removal of parameters like `engine`. Closes #8206.
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13,805
ASV: fix params to be strings (for better repr)
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1
2016-07-26T18:29:31Z
2016-07-27T10:19:32Z
2016-07-27T10:19:31Z
MEMBER
null
Small fix to using params in asv (otherwise the name was huge, list of 500000 elements) cc @gfyoung (just so you know I changed this for future reference)
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MDU6SXNzdWUxNjc2Nzk3NjY=
13,806
"Or" does not have commutative property (possibly because it catches exceptions silently?)
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13
2016-07-26T18:37:57Z
2016-07-27T12:28:06Z
2016-07-27T11:25:41Z
NONE
null
#### Code Sample, a copy-pastable example if possible import pandas as pd ``` #Create sample dataframe test = pd.DataFrame({"a":["12", float("nan"), "3", "meow" ]}) # Select rows that are null or numeric: print len(test[ test["a"].isnull() | test["a"].str.isnumeric()]) # Select rows that are numeric or null print l...
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13,807
DOC: contributing: explain how to set the asv reporting threshold
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2
2016-07-26T19:41:47Z
2016-07-27T09:37:44Z
2016-07-27T09:37:43Z
CONTRIBUTOR
null
The default `asv continuous` reporting threshold is 100% change (2x), which probably is far too large for pandas use case, so instruct how to set it lower. (Probably the asv default should be changed, but that's a different issue.)
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13,808
Initializing DataFrom from list of OrderedDicts does not preserve Column order
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2
2016-07-26T19:49:47Z
2016-07-26T22:52:55Z
2016-07-26T22:20:56Z
NONE
null
``` python >>> import pandas as pd >>> from collections import OrderedDict >>> od = [OrderedDict([('z', 0), ('a', 1), ('*', 2)])] >>> pd.DataFrame(od) * a z 0 2 1 0 >>> pd.DataFrame.from_dict(od) * a z 0 2 1 0 ``` If OrderedDicts are used, I would expect the column order of the first OrderDict that is ...
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13,809
Why is there no mode method for groupby objects?
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2016-07-26T21:52:06Z
2016-07-26T22:24:47Z
2016-07-26T22:24:38Z
NONE
null
There is `mean`, `max`, `median`, `min` and `mad` yet no `mode` for `groupby` objects. Is there a good reason? What if I add and issue pull-request?
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167,744,692
MDExOlB1bGxSZXF1ZXN0Nzg5NDk0MzE=
13,810
DOC: Fix groupby nth
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4
2016-07-27T00:48:19Z
2016-07-29T00:28:27Z
2016-07-29T00:28:21Z
MEMBER
null
- [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` Current API doc looks incorrect. Fixed it to meet #11039. - http://pandas-docs.github.io/pandas-docs-travis/generated/pandas.core.groupby.GroupBy.nth.html cc @behzadnouri
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13,811
specific-column-is-last
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7
2016-07-27T02:25:54Z
2016-07-27T21:37:10Z
2016-07-27T02:36:45Z
NONE
null
#### Code Sample, a copy-pastable example if possible df.columns Index([u'a', u'b', u'c', u'd'], dtype='object') Dont do this, looks like a bug. df.columns.drop(["b"]).insert(-1, 'b') Index([u'a', u'c', u'b', u'd'], dtype='object') df.columns.drop(["b"]).insert(-1, 'x') Index([u'a', u'c', u'x', u'd'], dtype='...
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167,766,018
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13,812
BUG, COMPAT: Fix multi-char sep + non-utf8 in read_csv for Python 2
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5
2016-07-27T04:07:34Z
2016-07-28T23:43:44Z
2016-07-28T23:43:39Z
MEMBER
null
Title is self-explanatory. Closes #3404.
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167,798,041
MDU6SXNzdWUxNjc3OTgwNDE=
13,813
Groupby and shift causing coredump
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3
2016-07-27T08:23:37Z
2016-07-29T10:22:23Z
2016-07-29T10:22:23Z
NONE
null
Hi, I have attempted to reduce this to the smallest example that exhibits this issue - rather than a useful example. The problem is that the operation causes python to core dump. In the original case in which I discovered this the core dump would only occur sometimes (and when I put it in a loop it would occur on di...
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167,827,838
MDExOlB1bGxSZXF1ZXN0NzkwMDUwMjA=
13,814
TST: AmbiguousTimeError with set_index()
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3
2016-07-27T11:03:16Z
2016-07-27T21:31:58Z
2016-07-27T21:31:55Z
MEMBER
null
- [x] closes #12920 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry this has been fixed by #13750. added tests.
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13,815
BLD: use tempita for hashtable
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4
2016-07-27T11:06:35Z
2016-07-28T23:42:08Z
2016-07-28T23:41:41Z
MEMBER
null
- [x] closes #13786 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff`
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167,835,617
MDU6SXNzdWUxNjc4MzU2MTc=
13,816
pd.Series.min(skipna=True) is not working on a slice
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2
2016-07-27T11:52:32Z
2016-07-27T21:29:47Z
2016-07-27T21:29:36Z
NONE
null
#### Code Sample, a copy-pastable example if possible ``` Python s = pd.Series(data=[1, 3, datetime(2016,7,27).date(), datetime(2015,7,27).date(), datetime(2017,7,27).date(), np.nan]) s 0 1 1 3 2 2016-07-27 3 2015-07-27 4 2017-07-27 5 NaN dtype: object s.iloc[2:] 2 201...
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167,841,999
MDU6SXNzdWUxNjc4NDE5OTk=
13,817
BUG: df.to_dict('record') casts ints to floats
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2016-07-27T12:31:03Z
2016-07-27T13:07:15Z
2016-07-27T13:07:10Z
NONE
null
#### Code Sample, a copy-pastable example if possible ``` df = pd.DataFrame({"a": [1, 2], "b": [42, 65], "c": [0.5, 0.4]}) df.to_dict("records") >>> [{'a': 1.0, 'b': 42.0, 'c': 0.5}, {'a': 2.0, 'b': 65.0, 'c': 0.40000000000000002}] ``` #### Expected Output ``` [{'a': 1, 'b': 42, 'c': 0.5}, {'a': 2, 'b': 65, 'c'...
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167,848,378
MDU6SXNzdWUxNjc4NDgzNzg=
13,818
DataFrame - Add chunksize to from_records()
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2016-07-27T13:03:50Z
2021-05-01T22:47:08Z
null
NONE
null
#### Code Sample, a copy-pastable example if possible Currently the from_records does not take a chunksize. ``` import pandas as pd df = pd.DataFrame.from_records(data, index=None, exclude=None, columns=None, coerce_float=False, ...
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13,819
BUG: group_shift_indexer checks for null group keys
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2016-07-27T13:07:58Z
2016-07-29T10:23:06Z
2016-07-29T10:22:23Z
CONTRIBUTOR
null
- [x] closes #13813 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry
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167,885,574
MDU6SXNzdWUxNjc4ODU1NzQ=
13,820
ERR: better error message on invalid return from .apply
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2016-07-27T15:37:16Z
2020-01-07T23:45:41Z
2020-01-07T23:45:41Z
NONE
null
#### Code Sample ``` python def apply_list (row): return [2*row['A'], 4*row['C'], 3*row['B']] df = pd.DataFrame(np.random.randn(6,4), columns=list('ABCD')) df['E'] = pd.Timestamp('20130102') df['L'] = df.apply(apply_list, axis=1) ``` #### (Wrong) Error Output ``` ValueError: Shape of passed values is (6, 3), i...
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MDU6SXNzdWUxNjc4ODc2NDI=
13,821
'groupby' multiple columns and 'sum' multiple columns with different types
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2016-07-27T15:45:39Z
2018-11-08T15:09:15Z
2018-11-08T15:08:41Z
NONE
null
#### Code Sample, a copy-pastable example if possible ``` from decimal import * import pandas as pd df = pd.DataFrame( {'name': ['foo', 'bar', 'foo', 'bar'], 'title': ['boo', 'far', 'boo', 'far'], 'id': [123, 456, 123, 456], 'int_column': [1...
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MDU6SXNzdWUxNjc5MzA1NTc=
13,822
KeyError shows incorrect column name when DataFrame has duplicate columns
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3
2016-07-27T19:02:37Z
2020-02-14T10:34:14Z
2016-08-02T10:50:50Z
CONTRIBUTOR
null
``` python >>> import pandas as pd >>> df = pd.DataFrame({'x': [1.], 'y': [2.], 'z': [3.]}) >>> df.columns = ['x', 'x', 'z'] >>> df[['x', 'y', 'z']] KeyError: "['z'] not in index" ``` I expected to see `KeyError: "['y'] not in index"`. I've tested this on the latest code in master (and on 0.16): ``` >>> pd.show_vers...
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167,979,708
MDU6SXNzdWUxNjc5Nzk3MDg=
13,823
API: Add support for PEP 519
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3
2016-07-27T23:24:55Z
2017-05-18T21:06:27Z
2017-05-18T21:06:27Z
NONE
null
File System Path Protocol has been accepted and implemented into Python 3.6, a backwards compatibility layer to support the introduced PEP 519 for python version < 3.6.
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168,018,106
MDU6SXNzdWUxNjgwMTgxMDY=
13,824
Mixing bars and lines in a time series plot clobbers the xaxis tick values?
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1
2016-07-28T05:52:17Z
2016-07-28T06:13:20Z
2016-07-28T06:12:38Z
NONE
null
All rendered in a jupter notebook with `%matplotlib inline` The following non-time series plot works fine ``` python dd = pd.DataFrame({'a':[-1,1,2], 'b':[3,2,3]}) fig, ax = plt.subplots() dd.a.plot.bar(ax=ax) dd.b.plot(ax=ax) ``` The following timeseries variant results in the bars not appearing on the plot, but...
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13,825
Feature suggestion: flexible merge by function
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4
2016-07-28T09:09:11Z
2019-10-09T05:12:40Z
2019-10-09T05:12:40Z
NONE
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It would be really convenient to allow the **on**, **left_on** and **right_on** arguments of **pandas.merge** being a function, with the following suggested signatures: Arguments: - **index** (pandas.Index) - **row** (pandas.Series) They will return an hashable object (of any dtype) to be compared against the other d...
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168,054,847
MDU6SXNzdWUxNjgwNTQ4NDc=
13,826
Feature suggestion: custom DataFrame HTML display (for IPython notebook)
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8
2016-07-28T09:44:51Z
2017-08-10T10:49:28Z
2017-08-10T10:49:28Z
NONE
null
I looked briefly at your new custom styling feature from version 0.17.1 (http://pandas.pydata.org/pandas-docs/stable/style.html). I'm excited about the possibilities of custom styling and all the benefits it would allow researchers, but I feel that the current interface is somewhat non-intuitive and limited. I would li...
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168,087,963
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13,827
COMPAT: Categorical Subclassing
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5
2016-07-28T12:52:08Z
2016-08-04T10:36:57Z
2016-08-04T10:36:54Z
MEMBER
null
- [x] related to #8640 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` It allows to subclass `Categorical` related to #8640. Shoud it use `_simple_new` or `_constructor`?
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168,101,167
MDU6SXNzdWUxNjgxMDExNjc=
13,828
to_html ignores na_rep when float_format set
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1
2016-07-28T13:53:34Z
2020-10-24T02:49:08Z
2020-10-24T02:49:08Z
NONE
null
#### Code Sample, a copy-pastable example if possible http://stackoverflow.com/questions/23700835/pandas-to-html-no-value-representation df = pd.DataFrame([['A',1.2225],['A',]], columns=['Group','Data']) df.to_html(na_rep="Ted",float_format='{0:.2f}'.format) #### Expected Output <table border="1" class="dataframe"> ...
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13,829
Incorrect timedelta type coercion when doing in-place .loc expansion
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2
2016-07-28T15:00:13Z
2019-10-21T19:52:16Z
null
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ``` python In [1]: import pandas as pd In [2]: d = pd.DataFrame(columns=list('abc')) In [3]: d.loc[0] = dict(a=pd.to_timedelta(5, unit='s'), b=pd.to_timedelta(72, unit='s'), c='23') In [4]: d Out[4]: a ...
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13,830
Inconsistent types in output of series.to_dict() and DataFrame([series]).loc[0].to_dict()
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3
2016-07-28T15:36:10Z
2016-07-28T16:41:28Z
2016-07-28T16:40:17Z
NONE
null
`to_dict()` extracts the elements from a Series as different types depending on whether or not the series was accessed by, e.g. `loc[0]` on a DataFrame or not: ``` python >>> s = pd.Series({'a': None, 'b': 99, 'c': 'hello'}) >>> df = pd.DataFrame([s]) >>> [type(v) for k, v in s.to_dict().items()] [NoneType, str, int] ...
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MDU6SXNzdWUxNjgyMTkwNDg=
13,831
Series.loc/iloc[x, y] does not raise exception
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2016-07-28T23:21:52Z
2020-03-30T18:49:31Z
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NONE
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#### Code Sample, a copy-pastable example if possible ``` df = pd.DataFrame({'a': [10]}) # df['a'] is a series, can be indexed with 1 index only # will raise IndexingError, as expected df['a'].iloc[0, 0] df['a'].loc[0, 0] # will raise nothing, not as expected df['a'].iloc[0, 0] = 1000 # equivalent to pass df['a'].lo...
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168,275,980
MDExOlB1bGxSZXF1ZXN0NzkzMjQyNzI=
13,832
BUG: Don't error in pd.to_timedelta when errors=ignore
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35
2016-07-29T08:32:20Z
2016-08-15T22:27:42Z
2016-08-15T22:27:20Z
MEMBER
null
Title is self-explanatory. Closes #13613.
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168,309,203
MDExOlB1bGxSZXF1ZXN0NzkzNDgyNDU=
13,833
TST: A test to cover fault in issue #5291
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2
2016-07-29T11:56:44Z
2017-11-06T02:01:14Z
2016-08-02T05:37:04Z
CONTRIBUTOR
null
The mentioned issue faulted under similar conditions as issue #13703, and was also fixed by PR #13788. This PR just adds a test to replicate the fault, as discussed in the issue's thread. - [x] closes #5291 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry This PR ...
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168,317,305
MDU6SXNzdWUxNjgzMTczMDU=
13,834
[BUG]: Wrong unix timestamp parsing with floating point using pd.to_datetime
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3
2016-07-29T12:48:05Z
2016-08-09T21:48:25Z
2016-08-09T21:48:25Z
NONE
null
Hello! I'm trying to parse floating point timestamps with `pd.to_datetime` but the only way that it works is using the **deprecated parameter** `coerce=True` For example, without `coerce=True` the result is wrong. ``` python >>> pd.to_datetime(1.1, unit='s') # Expected result Timestamp('1970-01-01 00:00:01.100000')...
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168,357,108
MDExOlB1bGxSZXF1ZXN0NzkzODI3Mjg=
13,836
BUG: Fix edge cases in merge_asof() by comparing factorized keys (#13709)
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16
2016-07-29T15:57:25Z
2016-08-01T20:56:59Z
2016-08-01T20:56:54Z
CONTRIBUTOR
null
closes #13709 Also removes unnecessary check_duplicates.
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168,361,477
MDU6SXNzdWUxNjgzNjE0Nzc=
13,839
Problem reading one-column files with guessed separator
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9
2016-07-29T16:19:20Z
2016-08-01T15:09:12Z
2016-08-01T14:47:52Z
NONE
null
#### Code Sample, a copy-pastable example if possible Create a simple csv file: ----- C:\myfile.csv name 1 2 3 4 ----- C:\myfile.csv And run: pd.read_csv("C:\myfile.csv", encoding = "ISO-8859-1", sep = None, engine = "python") This triggers an error: ValueError: Expected 2 fields in line 2, saw 1 If a specific separat...
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168,367,243
MDU6SXNzdWUxNjgzNjcyNDM=
13,841
Arithmetic Broadcasting
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3
2016-07-29T16:49:07Z
2016-07-29T17:06:41Z
2016-07-29T16:52:00Z
NONE
null
Okay, so the following "new" syntax is fine. import pandas as pd import random as randy df = pd.DataFrame({'A': range(1000), 'B': randy.sample(range(1000),1000)},\ index=randy.sample(pd.date_range('2013-02-01 09:00:00.000000',periods=1e6,freq='U'),1000)).sort_index() df.sub(df['A'],axis=0) But, at ...
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168,386,177
MDU6SXNzdWUxNjgzODYxNzc=
13,842
.loc on Hierarchical Index with single-valued index level can drop that index level in place
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2016-07-29T18:31:41Z
2018-11-17T22:55:26Z
2018-11-17T22:55:25Z
NONE
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### Small Example ``` python In [13]: import pandas as pd ...: ...: df1 = pd.DataFrame(data=dict(A=[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], ...: B=[1, 1, 2, 2, 2, 3, 1, 1, 1, 2, 3, 4], ...: C=[1, 2, 1, 2, 3, 2, 1, 2, 3, 2, 1, 4], ...: ...
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168,410,883
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13,843
BUG/API Series/Index integer floordiv/mod inconsistency
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3
2016-07-29T20:45:39Z
2019-07-11T14:32:15Z
2019-07-11T14:32:15Z
MEMBER
null
`Series` looks to be coerced to `float` if the result contains `NaN` or `inf`. Otherwise `Index` doesn't. Make it to be consistent in either way. #### Code Sample, a copy-pastable example if possible ``` pd.Series([1]) // pd.Series([0]) #0 inf # dtype: float64 pd.Index([1]) // pd.Index([0]) # Int64Index([0], dtype...
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168,413,927
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13,844
Empty dataset: typerror ufunc add cannot use operands with types dtype('<M8[ns]') and dtype('O')
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2016-07-29T21:03:30Z
2016-08-26T20:43:20Z
2016-08-26T20:43:20Z
NONE
null
#### Code Sample, a copy-pastable example if possible ``` python from pandas import DataFrame, to_datetime, to_timedelta data = {'Item': [1], 'Date_Time': ['2/8/2015 6:00:30'], 'Relative_Time': 20} dtf = DataFrame(data=data) print(dtf) dtf = dtf[dtf.Item == 2] # if the filter returns empty dataset expected result...
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13,845
BUG: fixes 13822, incorrect KeyError string with non-unique columns w…
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2
2016-07-29T21:17:14Z
2016-08-02T10:50:51Z
2016-08-02T10:50:50Z
CONTRIBUTOR
null
- [x] closes #13822 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry Made changes to fix the bug related to accessing columns in a df with duplicate columns where the KeyError string was returning the wrong column. The test that I added passed, but there seems ...
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13,846
ENH: add sort_categories argument to union_categoricals
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2016-07-29T21:48:04Z
2016-08-03T10:24:16Z
2016-08-03T10:24:10Z
CONTRIBUTOR
null
- needed for #13406, follow-up to #13763 - [ ] tests added / passed - [ ] passes `git diff upstream/master | flake8 --diff` - [ ] whatsnew entry cc: @janschulz, @sinhrks
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13,847
BUG: Fixed float parsing with unit when using pd.to_datetime (GH13834)
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2016-07-29T23:40:31Z
2016-08-09T21:48:40Z
2016-08-09T21:48:25Z
CONTRIBUTOR
null
- [x] closes #13834 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry
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13,848
ENH: add sparse op for int64 dtypes
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2016-07-30T10:02:48Z
2016-08-04T10:40:28Z
2016-08-03T22:48:47Z
MEMBER
null
- [x] related to #667 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry As a first step for #667, numeric op can now preserve `int64` dtype. On current master, dtype is reset to `float64` after op. ``` # current master a = pd.SparseArray([1, 2], dtype=np.int64) a....
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13,849
ENH: Sparse int64 and bool dtype support enhancement
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2016-07-30T10:26:34Z
2016-09-01T01:33:05Z
2016-08-31T07:57:34Z
MEMBER
null
- [x] closes #667, closes #8292, closes #13001, closes #8276, closes #13110 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry Currently, sparse doesn't support `int64` and `bool` dtypes actually. When `int` or `bool` values are passed, it is coerced to `float...
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13,850
Allow users to specify whether gbq should use standard SQL
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2016-07-30T15:54:14Z
2016-08-03T13:10:49Z
2016-08-03T10:30:31Z
CONTRIBUTOR
null
- [ x ] closes #13615 - [ x ] tests added / passed - [ x ] passes `git diff upstream/master | flake8 --diff` - [ x ] whatsnew entry All gbq tests passed locally ``` tony@tonypc:~/parthea-pandas/pandas/io/tests$ nosetests test_gbq.py -v test_import_google_api_python_client (pandas.io.tests.test_gbq.GBQUnitTests) ... o...
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13,851
DataFrame.rolling.apply does not appear to support kwargs
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2016-07-30T17:00:25Z
2016-07-30T17:31:05Z
2016-07-30T17:18:13Z
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#### Code Sample, a copy-pastable example if possible ``` python import pandas as pd import numpy as np def subtract_custom_value(x, custom_value, debug=False): return x-custom_value # this works (no rolling) series = pd.Series([20, 21, 12]) series.apply(subtract_custom_value, args=(5,), debug=True) # this comp...
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13,852
Series.replace and DataFrame.replace have same docstring?
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2016-07-30T18:46:14Z
2018-02-04T16:32:53Z
2018-02-04T16:32:53Z
NONE
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``` In [4]: pd.__version__ Out[4]: u'0.18.1' ``` The docstring for Series.replace refers to looking up column names, which AFAIK doesn't make sense for the Series version of `replace`. It seems like the Series function is just blindly inheriting the DataFrame docstring? http://pandas.pydata.org/pandas-docs/stable/ge...
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13,853
BUG: ufunc is not applied to sparse.fill_value
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2016-07-30T22:01:42Z
2016-08-03T22:42:32Z
2016-08-03T22:42:32Z
MEMBER
null
- [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry When ufunc is applied to sparse, it is not applied to `fill_value`. Thus results are incorrect. **on current master:** ``` np.abs(pd.SparseArray([1, -2, -1], fill_value=-2)) # [1.0, -2, 1.0] # Fill: -2 # IntIndex ...
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13,854
BUG: Preserve categorical dtypes in MultiIndex levels (#13743)
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2016-07-31T00:08:00Z
2016-09-07T13:24:30Z
2016-09-02T22:08:10Z
CONTRIBUTOR
null
- [x] closes #13743 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry This commit modifies `MultiIndex.from_array` and `MultiIndex.from_product`. Example: ``` python cat = pd.Categorical(['a', 'b'], categories=list("bac"), ordered=True) mi = pd.MultiIndex.from_ar...
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13,855
CLN: Removed trellis rplot
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2016-07-31T04:30:11Z
2016-08-02T10:46:40Z
2016-08-02T10:46:38Z
MEMBER
null
xref https://github.com/pydata/pandas/pull/9357. Title is self-explanatory.
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13,856
TST: Use pytest
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2016-07-31T13:32:45Z
2017-04-05T02:07:20Z
2017-02-10T15:52:09Z
CONTRIBUTOR
null
- [x] closes https://github.com/pydata/pandas/issues/13097 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry Just a WIP for now, will need to iterate on the CI stuff to ensure that's all good. What can I provide to make this easier to review? Refactoring te...
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CLN: Removed colSpace parameter
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2
2016-07-31T16:47:22Z
2016-08-01T20:58:45Z
2016-08-01T20:58:38Z
MEMBER
null
Title is self-explanatory. Seems like it was already done in `DataFrame.to_string()` some time ago.
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BUG: disallow 'w' mode in pd.read_hdf (#13623)
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2016-07-31T18:38:17Z
2016-08-01T19:22:46Z
2016-08-01T19:22:43Z
CONTRIBUTOR
null
- [x] closes #13623 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry Passing mode='w' to read_hdf raises ValueError.
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MAINT: Nicer error msg for NULL byte in read_csv
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2
2016-07-31T20:54:47Z
2016-08-01T21:17:16Z
2016-08-01T21:17:12Z
MEMBER
null
Provides a nicer error message for the Python engine in `read_csv` when the data contains a `NULL` byte. Closes #2741.
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13,860
`read_csv` with character `"`
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2016-07-31T22:49:18Z
2016-07-31T23:34:27Z
2016-07-31T23:33:47Z
NONE
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#### Code Sample, a copy-pastable example if possible Input file: (content of `example` file) ``` a1 b1 c1 d1 " c y z a3 b3 c3 d3 " d4 s4 d4 ``` Code: ``` python extb = pd.read_csv('example', encoding='utf8', sep='\t', header=None); extb[:] ``` Output: ``` 0 1 2 3 0 a1 b1 c1 d1 1 \tc\...
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BUG: loffset not applied when using resample with agg() (GH13218)
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2016-08-01T02:13:15Z
2016-08-22T22:39:12Z
2016-08-13T22:46:07Z
CONTRIBUTOR
null
- [x] closes #13218 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry
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13,862
Add setting for switching between "production" and "interactive" mode
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2016-08-01T10:27:46Z
2021-05-01T22:52:38Z
2021-05-01T22:52:38Z
NONE
null
It seems that future development in Pandas creates a distinction between "production" and "interactive" use. I frequently use Pandas to do interactive data analyses. As such, things like indexing shortcuts are very handy. However, I also can see that some of this magic can create very subtle bugs in production systems....
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13,863
COMPAT: windows builds breaking after #13788
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2016-08-01T10:52:02Z
2016-08-01T20:00:45Z
2016-08-01T20:00:45Z
CONTRIBUTOR
null
see [here](https://github.com/pydata/pandas/pull/13788#issuecomment-236409748) looks like a pointer specification, see #13788
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13,864
CLN: Removed / filled stub read_csv tests
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2016-08-01T11:00:41Z
2016-08-01T19:21:44Z
2016-08-01T19:21:39Z
MEMBER
null
Title is self-explanatory. xref #4782
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13,865
BLD: Fixed pointer ambiguity in 'tokenizer.c'
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2016-08-01T13:07:23Z
2016-08-01T20:01:29Z
2016-08-01T20:00:45Z
CONTRIBUTOR
null
- [x] closes build compatibility issue #13863 - [x] tests added / passed (see notes) - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry (No whatsnew entry was necessary) ## notes The branch was tested on win7 64bit virtual machine with anaconda 4.1.1 both with python 2.7 (VS2008) and with py...
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13,866
BUG: SparseDataFrame may not preserve passed dtype
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2016-08-01T13:27:30Z
2016-08-03T10:18:07Z
2016-08-03T10:18:04Z
MEMBER
null
- [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry `SparseDataFrame` may reset passed sparse data's `dtype` and `fill_value` as below. **on current master:** ``` arr = pd.SparseArray([1, 0, 3, 0], dtype=np.int64, fill_value=0) # OK, dtype and fill_value are kept ...
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TST: use types.api in plotting
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2016-08-01T13:58:59Z
2016-08-01T19:20:34Z
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MEMBER
null
- [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` remove warning related to #13147 and #13621
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DEPR: Remove legacy offsets
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2016-08-01T14:15:12Z
2016-08-02T10:21:23Z
2016-08-02T10:21:21Z
CONTRIBUTOR
null
- [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry Follow-up to #13590. Remove legacy offset aliases that remained in `pandas/tseries/frequencies.py`: `_period_alias_dictionary()` and `_period_alias_dict`.
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BUG: DataFrame.loc[i:j] works differently for DatetimeIndex
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7
2016-08-01T15:36:54Z
2019-05-13T00:28:41Z
2019-05-13T00:28:41Z
CONTRIBUTOR
null
This code all "works," but in a surprising way: ``` import pandas as pd t0 = 1234567890123400000 df1 = pd.DataFrame(index=pd.DatetimeIndex([t0, t0 + 1000, t0 + 2000, t0 + 3000])) df2 = pd.DataFrame(index=range(4)) df1.loc[:2, 'a'] = np.arange(2) df2.loc[:2, 'a'] = np.arange(3) ``` We create `df1` with a DatetimeIndex...
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13,870
DOC: link to install instructions in README.md
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2016-08-01T16:25:53Z
2017-03-06T11:31:27Z
2017-03-06T11:31:16Z
NONE
null
_edit: the install instructions in the github README.md are out of date. They should link to the install instructions on the website_ --- I'm not sure what the expectation is here, but it seems to me that something's not right... The [installation instructions](https://github.com/pydata/pandas/#where-to-get-it) say ...
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ERR: more informative error messages on invalid freq for Period when they are point-in-time
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2016-08-01T17:19:59Z
2021-05-07T20:41:10Z
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CONTRIBUTOR
null
`Period` and `PeriodIndex` raise `ValueError` when `freq` is any of the following strings: ``` 'BM', 'CBM', 'MS', 'BMS', 'CBMS', 'BQ', 'QS', 'BQS', 'BA', 'AS', 'BAS', 'BH' ``` `date_range` is fine in all cases. Also confirmed on `master`. Possible related to #4878. #### Code Sample, a copy-pastable example if possib...
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13,872
ERR: set errno in read_csv
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2016-08-01T20:12:12Z
2021-05-17T15:17:30Z
2021-05-17T15:17:29Z
NONE
null
The same is true for Pandas on Python 2.7 with except IOError and on Python 3.5 with OSError. The following is how to reproduce the bug on Python 3.5. Pandas is not reporting any errno within the exceptions. As a result, there is no way to differentiate between File Not Found Error (ENOENT) and other types of OSError...
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.iloc[:] and .loc[:] return the original object
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2016-08-01T20:36:03Z
2017-06-14T23:03:28Z
2017-06-14T23:03:27Z
MEMBER
null
Each of these asserts should fail: ``` python # on pandas 0.18.1 import pandas as pd df = pd.DataFrame({'x': range(3)}) assert df.iloc[:] is df assert df.loc[:] is df series = df.x assert series.iloc[:] is series assert series.loc[:] is series ``` Instead, for the sake of predictability, these should always return ...
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BUG: Fix Period and PeriodIndex support of combined offsets aliases
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2016-08-01T21:16:57Z
2016-08-08T14:12:32Z
2016-08-08T14:11:31Z
CONTRIBUTOR
null
- [x] closes #13730 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry Essentially, makes sure any `freq` string passed to a `Period` or `PeriodIndex` goes through [`_Period._maybe_convert_freq()`](https://github.com/pydata/pandas/blob/master/pandas/src/period.pyx#L...
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13,875
API: consider better decorator option
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2016-08-01T22:02:20Z
2020-09-22T22:33:48Z
2020-09-22T22:33:47Z
CONTRIBUTOR
null
It's not an issue in py3.5, but in older versions this is annoying - because a decorator is used in the definition, the function signature on `to_datetime` is lost. This is the big one I've run into, but there may be some other places in the API it comes up. ![image](https://cloud.githubusercontent.com/assets/1924092/...
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BUG: Series creation with datetime64 with non-ns unit as object dtype
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2016-08-01T23:50:25Z
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MEMBER
null
- [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry found a bug related to `datetime64` with non-ns unit. ``` # OK pd.Series(np.array([np.datetime64('2011-01-01')])) #0 2011-01-01 # dtype: datetime64[ns] # OK pd.Series([np.datetime64('2011-01-01')], dtype=object)...
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ERR/API: non-string types
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2016-08-02T01:37:11Z
2019-06-01T15:03:08Z
2019-06-01T15:03:08Z
CONTRIBUTOR
null
xref #5602, #9343, #13806 (comments) #### Code Sample, a copy-pastable example if possible ``` In [2]: s = pd.Series(['a', 123, 'b']) In [3]: s.str.startswith('a') Out[3]: 0 True 1 NaN 2 False dtype: object ``` #### Expected Output raise an exception Reasoning: If I provide NaN, it's okay to return NaN, ...
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13,878
solve list cannot add to tuple error in make_signature function
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2016-10-28T14:58:29Z
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NONE
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `git diff upstream/master | flake8 --diff` - [ ] whatsnew entry
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skipfooter doesn't really "skip" in read_csv
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2016-08-02T08:45:43Z
2016-11-29T21:19:56Z
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MEMBER
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On `master`: ``` python from pandas import read_csv from pandas.compat import StringIO data = 'a,b,c\ncat,foo,bar\ndog,foo,"baz' # Note the stray quotation mark read_csv(StringIO(data), engine='python', skipfooter=1) ... _csv.Error: unexpected end of data ``` If we were truly "skipping" the last row, no error should...
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Series.idxmax() and Series.max() show inconsistent behaviour with pd.np.Inf
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NONE
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`idxmax` is supposed to return the index of the maximum element. However, it seems to ignore special values like infinity (`pd.np.Inf`), leading to the following inconsistency: ``` python >>> from pandas import DataFrame >>> s = pd.Series([0,5,pd.np.Inf]) >>> s.max() == s.ix[s.idxmax()] ``` This snippet will return `...
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13,881
TST: Add first line comment tests in read_csv
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2
2016-08-02T10:38:42Z
2016-08-03T10:15:51Z
2016-08-03T10:15:47Z
MEMBER
null
Title is self-explanatory. Closes #4623.
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13,882
DOC: Update README to link to install instructions.
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5
2016-08-02T12:30:44Z
2017-04-05T02:07:02Z
2016-08-28T18:26:12Z
CONTRIBUTOR
null
Want any updates to the actual install instructions? Should we remove the section on wakari? Do we have a preference for conda-forge over the default channel?
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168,948,923
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13,883
Pandas threading crash
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4
2016-08-02T17:59:55Z
2016-08-02T19:16:37Z
2016-08-02T19:13:26Z
NONE
null
The following code crashes Pandas 0.18.1 with SIGSEGV: ``` #!/usr/bin/env python3 import threading import pandas as pd import numpy as np def lets_crash(): t = 0.02 * np.arange(100000) data = pd.DataFrame({'t': t}) data['t'] * 1.5 ...
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13,884
Round trip through HDF5 with format=table and localized DatetimeIndex discards index name
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2
2016-08-02T19:08:37Z
2016-08-04T21:04:30Z
2016-08-04T21:04:30Z
CONTRIBUTOR
null
This should work, but the assert fails: ``` import pandas as pd df = pd.DataFrame({'a': [1,2,3]}) df.index = pd.DatetimeIndex([1234567890123456787, 1234567890123456788, 1234567890123456789]) df.index = df.index.tz_localize('UTC') # this line makes the index name go away df.index.name = 'expected' df.to_hdf('hello.h5'...
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BUG: Ignore the BOM in UTF8 BOM CSV files
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5
2016-08-03T07:35:54Z
2016-08-05T10:37:31Z
2016-08-05T10:37:31Z
MEMBER
null
Title is self-explanatory. Closes #4793.
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13,886
DOC: small releasenote fixes
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2016-08-03T13:39:26Z
2016-08-03T14:51:58Z
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MEMBER
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13,887
pandas.DataFrame.to_html() does not provide an option to remove all styling attributes
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2016-08-03T16:04:47Z
2016-08-03T19:47:55Z
2016-08-03T19:47:33Z
NONE
null
DataFrame.to_html() renders by default a table element with a border='1' attribute. The text-align style attribute on the <thead> <tr> is also set to "right". Even if it is easy to override by code or CSS, it should be good to have an option that removes or clear all styling attributes on the generated table. For examp...
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13,888
BUG: preserve DatetimeIndex.name in HDFStore/read_hdf() with tz (#13884)
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2016-08-03T17:19:40Z
2016-08-04T21:04:31Z
2016-08-04T21:04:30Z
CONTRIBUTOR
null
- [x] closes #13884 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry
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BUG: Empty lists shouldn't be counted as DateOffsets. See #13844
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2016-08-03T17:56:03Z
2016-08-26T20:43:21Z
2016-08-26T20:43:20Z
CONTRIBUTOR
null
- [x] closes #13844 - [ ] tests added / passed - [ ] passes `git diff upstream/master | flake8 --diff` - [ ] whatsnew entry
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BUG: avoid "b" prefix for bytes in to_csv() on Python 3 (#9712)
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12
2016-08-03T19:34:05Z
2016-09-14T13:23:22Z
2016-09-13T10:05:42Z
CONTRIBUTOR
null
- [x] closes #9712 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry
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13,891
BUG: allow describe() for on boolean-only columns
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2016-08-03T20:00:38Z
2016-08-08T14:06:28Z
2016-08-08T14:06:28Z
NONE
null
I know I can obtain the expected output by using `include=['bool']`, but that feels bad to me as a user. I want `describe()` to know that I'm only asking for boolean columns and not freak out. Thank you! #### Code Sample, a copy-pastable example if possible ``` python >>> test_df = pd.DataFrame({'test_ind_1': [False,...
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13,892
HDF read query issue
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2016-08-03T20:24:48Z
2016-08-05T14:42:23Z
2016-08-05T14:42:22Z
NONE
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I created an HDF file using: ``` X.to_hdf('test.hdf', 'X', format='t', data_columns=['date', 'evaluation']) ``` I am interested in reading rows matching a query: ``` where = "((date >= '2010-01-01' and date < '2012-01-01') & (evaluation > 0)) | (date == '2012-01-01')" ``` However running ``` pd.read_hdf('test.hdf'...
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13,893
Failure to load Pandas in Docker
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2016-08-03T22:12:53Z
2016-08-03T22:58:34Z
2016-08-03T22:17:54Z
NONE
null
#### Code Sample, a copy-pastable example if possible More difficult than that. Trying to import pandas when Running Python 3.5 in a Docker container, passing the --user option to 'docker run'. in this case, running Python 3.5 in a docker container using HTCondor #### Expected Output Should quietly load #### Actual O...
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13,894
API/BUG: Fix Series ops inconsistencies
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2016-08-03T22:55:56Z
2016-08-25T10:21:00Z
2016-08-25T10:20:52Z
MEMBER
null
- [x] closes #1134, closes #4581, closes #13538 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry This includes the fix only for #1134 and not for other inconsistencies (like #13637), as it needs further discussions. Changes: - series comparison operator to check ...
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13,895
CI: Windows builds started failing
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2016-08-03T23:19:42Z
2016-08-07T00:55:47Z
2016-08-07T00:55:47Z
CONTRIBUTOR
null
https://ci.appveyor.com/project/jreback/pandas-465/build/1.0.847/job/fb6cmln4nrxw52ef the commit was just some tests any ideas?
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13,896
API: Series/DataFrame logical op NaN propagation
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2016-08-03T23:20:38Z
2019-11-12T23:32:46Z
2019-11-12T23:32:46Z
MEMBER
null
The same as #13806, but for discuss differences with `DataFrame`. ``` pd.Series([True, False, np.nan]) | pd.Series([True, False, True]) #0 True #1 False #2 False # dtype: bool pd.Series([True, False, True]) | pd.Series([True, False, np.nan]) #0 True #1 False #2 True # dtype: bool pd.DataFrame([T...
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13,897
BUG: fix precision to specify decimal places
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2016-08-04T00:42:30Z
2016-12-26T21:42:27Z
2016-12-26T21:42:27Z
CONTRIBUTOR
null
- [x] closes #13257 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [ ] whatsnew entry Use 'f' as a string conversion type to specify the number of decimals to represent. The 'g' format will instead fall back to the 'e' format causing the unexpected behavior seen in GHI13257. See...
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13,898
BUG: allow describe() for DataFrames with only boolean columns
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2016-08-04T01:10:51Z
2016-08-08T14:06:28Z
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CONTRIBUTOR
null
- [x] closes #13891 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry Closes #13891. Existing tests pass. ~~No new tests added yet.~~
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13,899
BUG: union_categorical fastpath sort
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2016-08-04T01:19:35Z
2016-08-04T10:38:38Z
2016-08-04T10:38:38Z
CONTRIBUTOR
null
Follow up to a problem with #13846. This path was tested, but the test just happened to be constructed in such a way it worked with the buggy implementation.
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13,900
ENH: sparse astype now supports int64 and bool
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4
2016-08-04T10:26:13Z
2016-08-04T21:12:21Z
2016-08-04T21:09:18Z
MEMBER
null
- [x] split from #13849 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry `SparseXXX` now support `astype` other than `float64` dtype. It raises `ValueError` when its `sp_values` or `fill_value` cannot be converted to specified dtype. ``` s = pd.SparseSeries([1., ...
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169,349,923
MDU6SXNzdWUxNjkzNDk5MjM=
13,901
Groupby doesn't accept level=[0] for Index.
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7
2016-08-04T11:11:55Z
2016-09-22T10:34:46Z
2016-09-22T10:34:46Z
NONE
null
Today I've found weird behaviour of level parameter of groupby. I need to groupby two dataframes by index and this code is working as long as I'm using Multiindex. ``` python index1 = pandas.Index([1,2,3,4,5]) index2 = pandas.Index([1,2,3,4,5]) first = pandas.DataFrame({'a':[1,2,3,4,5]}, index=index1) second = df2 = ...
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169,393,144
MDU6SXNzdWUxNjkzOTMxNDQ=
13,902
ENH: Faster merge_asof() through a single-pass algo
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4
2016-08-04T14:48:45Z
2016-08-08T13:42:05Z
2016-08-08T13:42:05Z
CONTRIBUTOR
null
Out of curiosity, I took a crack at a single-pass `merge_asof()`. My sample passes the existing regression tests but is "wrong" in that it works only for a single object-type "by" parameter. I use `PyObjectHashTable` while scanning through the right DataFrame to cache the most recently found row for each "by" object. ...
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13,903
ENH: Faster merge_asof() performs a single pass when joining tables (#13902)
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2016-08-04T14:52:49Z
2016-08-08T12:47:12Z
2016-08-08T12:46:12Z
CONTRIBUTOR
null
This version passes existing regression tests but is ultimately wrong because it requires the "by" column to be a single object. A proper version would handle int (and possily float) columns through type differentiation.
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13,904
Example of High Memory Usage of MultiIndex
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26
2016-08-04T15:39:32Z
2020-09-02T17:02:43Z
2017-02-15T15:25:57Z
NONE
null
This is a dupe of #1752, in which @jreback recommended a new issue be opened. I have a (hopefully) reproduce-able example which shows how using MultiIndex can explode RAM usage. At the top I define a function to get the memory of the current Python process. This will be called as I create arrays to get the "true" spac...
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13,905
DatetimeIndex + TimeDelta gives wrong results when timezone is set
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1
2016-08-04T16:11:28Z
2018-01-02T11:23:50Z
2018-01-02T11:23:50Z
CONTRIBUTOR
null
When I add a time delta to a DatetimeIndex which is tz-aware, the results appear as UTC, but sometimes claim to be in the original non-UTC timezone. #### Code ``` import pandas as pd index = pd.DatetimeIndex(['2016-06-28 05:30', '2016-06-28 05:31'], dtype='datetime64[ns, America/Chicago]') offset = pd.Series(['00:00:0...
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13,906
Chained groupby-resample object raises error when used twice with different column selector
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1
2016-08-04T16:44:23Z
2016-08-04T16:49:45Z
2016-08-04T16:49:41Z
NONE
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Going from 0.18.0 to 0.18.1, a chained groupby - resample object can now only be used once. A second similar operation raises a KeyError when a column that is not used in the first operation is selected. #### Code Sample, a copy-pastable example if possible ``` N = 5 df = pd.DataFrame({'a': np.ones(N), 'b': np.ones(N)...
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13,907
ENH: Accept list as level for groupby in non-MultiIndexed objects
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2016-08-04T17:44:14Z
2016-09-22T10:34:50Z
2016-09-22T10:34:46Z
CONTRIBUTOR
null
- [x] closes #13901 - [x] tests added / passed - [x] passes `git diff upstream/master | flake8 --diff` - [x] whatsnew entry
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