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https://api.github.com/repos/pandas-dev/pandas/issues/10403
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89,953,832
MDU6SXNzdWU4OTk1MzgzMg==
10,403
Assign SparseDataFrame row-by-row error
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1
2015-06-21T20:01:44Z
2015-06-22T08:20:09Z
2015-06-22T08:19:56Z
NONE
null
Hi, I am trying to initialize a sparseDataFrame into block of memory and assign the value row-by-row, which ends up with: ``` a = np.random.rand(4,5) b = pd.DataFrame(a) c = sparse.csr_matrix(a) d = pd.SparseDataFrame(index=b.index, columns=b.columns) elem = pd.SparseSeries(c[2].toarray().ravel()) d.loc[[2]] = [ elem...
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90,043,624
MDU6SXNzdWU5MDA0MzYyNA==
10,404
PERF: implement timedelta string parsing to c
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2015-06-22T08:38:48Z
2018-08-29T01:24:52Z
2018-08-29T01:24:52Z
CONTRIBUTOR
null
follows #6755 / #10396
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90,096,400
MDExOlB1bGxSZXF1ZXN0MzgyMzA2NzI=
10,405
TST: Use unicode literals in string test
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5
2015-06-22T13:21:28Z
2015-06-23T14:12:14Z
2015-06-23T14:12:07Z
MEMBER
null
Follow-up of #10397. Fix some ugly unicode tests. Shall I fix followings also? - Remove `compat.u()` completely, because the escaped literal is different from normal unicode literals internally. - Remove `compat.callable` brought back in v3.2 ([some code](https://github.com/pydata/pandas/blob/master/pandas/core/frame.p...
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https://api.github.com/repos/pandas-dev/pandas/issues/10406
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90,153,186
MDU6SXNzdWU5MDE1MzE4Ng==
10,406
slicing dataframe with date index is not working properly
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5
2015-06-22T16:56:39Z
2019-03-26T09:56:16Z
2019-03-26T06:26:21Z
NONE
null
When slicing data time - indexed dataframe with date in string format, it works: ``` df.ix['2014-11-12'].head() Out[55]: calories gsr heart-rate skin-temp steps date 2014-11-12 00:00:00 2.1 7.04640 NaN 85.77...
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90,189,163
MDU6SXNzdWU5MDE4OTE2Mw==
10,407
Pandas stopped working with matplotlib inset-axis
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6
2015-06-22T19:30:44Z
2015-11-27T12:35:05Z
2015-11-15T21:05:24Z
NONE
null
Hy, in older versions pandas was able to plot onto inset-axis of matplotlib. In new versions this support seems to be broken. I was able to execute the following code without any exceptions using an old pandas version. However, the current pandas version (0.16.2) throws an exception. Since the last update of matplotli...
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90,221,776
MDU6SXNzdWU5MDIyMTc3Ng==
10,408
vectorised setting of timestamp columns fails with python datetime and numpy datetime64
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13
2015-06-22T21:49:54Z
2015-07-24T13:50:18Z
2015-07-24T13:50:18Z
NONE
null
``` import pandas as pd import numpy as np import datetime as dt z=dt.date(2010,11,1) zs=[z+dt.timedelta(days=r) for r in range(5)] df=pd.DataFrame({'obj':zs, 'b':pd.Timestamp('2010-10-01'),'c':pd.Timestamp('2010-10-01')}) df.dtypes #df.loc[0:2,'c']=dt.date(2010,10,12) # causes error: long() argument must be a string ...
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90,249,714
MDU6SXNzdWU5MDI0OTcxNA==
10,409
BUG: merge with categoricals does not preserve categories dtype
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8
2015-06-23T00:18:46Z
2017-03-10T23:06:03Z
2017-03-10T23:06:03Z
CONTRIBUTOR
null
xref #14351 None of the following merge operations retain the `category` types. Is this expected? How can I keep them? #### Merging on a `category` type: Consider the following: ``` A = pd.DataFrame({'X': np.random.choice(['foo', 'bar'],size=(10,)), 'Y': np.random.choice(['one', 'two', 'three'], s...
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10,410
Writing as Excel with a MultiIndex is not yet implemented.
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2015-06-23T04:50:32Z
2015-06-23T10:35:42Z
2015-06-23T10:35:32Z
NONE
null
I get this error "NotImplementedError: Writing as Excel with a MultiIndex is not yet implemented. when running the example below(as described in your site): "Generating Excel Reports from a Pandas Pivot Table. "
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10,411
ENH: tolerance argument for limiting pad, backfill and nearest neighbor reindexing
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2015-06-23T08:21:54Z
2015-08-20T00:47:38Z
2015-08-18T23:05:06Z
MEMBER
null
xref #9817 This does not entirely solve the floating point precision issues, but gets us part of the way there -- we can explicitly lookup data with a fixed tolerance for nearest neighbor matches. It is also is useful in its own right, mostly as a simple sanity check to verify that labels are not entirely misaligned....
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10,412
BUG: setting a slice with datetime64 ignores datetime64 resolution
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1
2015-06-23T11:40:02Z
2015-07-24T13:50:18Z
2015-07-24T13:50:18Z
MEMBER
null
Resulting in 1970 datetimes when using eg `datetime64[D]` resolution (splitted from #10408): ``` In [46]: df=pd.DataFrame({'c':pd.Timestamp('2010-10-01')}, index=range(5)) In [47]: df Out[47]: c 0 2010-10-01 1 2010-10-01 2 2010-10-01 3 2010-10-01 4 2010-10-01 In [48]: df.loc[0:2,'c'] = np.datetime64('2010...
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90,411,171
MDU6SXNzdWU5MDQxMTE3MQ==
10,413
BUG: csv w only header and no index_col failing
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1
2015-06-23T14:55:38Z
2015-09-17T10:43:12Z
2015-07-07T09:30:45Z
CONTRIBUTOR
null
after this fix https://github.com/pydata/pandas/pull/10302 The following is failing (as `index_col` is `None`) ``` In [9]: data Out[9]: 'header1,header2\n' In [10]: read_csv(StringIO(data),iterator=True,index_col=False).read() TypeError: object of type 'bool' has no len() ```
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10,414
Documentation: Example missing in NA values by GroupBy
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2015-06-23T15:48:02Z
2015-07-01T10:58:05Z
2015-07-01T10:58:05Z
CONTRIBUTOR
null
http://pandas.pydata.org/pandas-docs/stable/missing_data.html#na-values-in-groupby ``` NA groups in GroupBy are automatically excluded. This behavior is consistent with R, for example. ``` I can take this up.
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90,443,040
MDU6SXNzdWU5MDQ0MzA0MA==
10,415
Add to_fwf support
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2015-06-23T17:23:30Z
2021-04-18T07:02:59Z
null
CONTRIBUTOR
null
Right now pandas can read fwf but there is no `to_fwf`. From [SO](http://stackoverflow.com/questions/16490261/python-pandas-write-dataframe-to-fixed-width-file-to-fwf). This output format seems similar to what [`numpy.savetxt`](http://docs.scipy.org/doc/numpy/reference/generated/numpy.savetxt.html) handles.
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10,416
Unstack MultiIndex vs consecutive unstack
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2
2015-06-23T17:29:11Z
2015-06-24T14:26:13Z
2015-06-23T21:17:38Z
NONE
null
Hello, If I try to unstack using multiIndex I got some groups divided. However, if I tried to do it by successive unstacking they are correctly grouped. Please see image below ![image](https://cloud.githubusercontent.com/assets/5657134/8312620/b044c562-19ab-11e5-8f88-f338efdb4ae8.png) I believe this is due to the f...
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10,417
BUG: groupby with levels on duplicated multi-index
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2015-06-23T19:10:49Z
2015-08-08T12:18:12Z
2015-08-08T12:18:12Z
NONE
null
``` x = pd.DataFrame({'x':[1,1,3,3],'y':[3,3,5,5]},index=[11,11,12,12]) y = x.stack() print(y) print(y.groupby(level=[0,1]).sum()) ``` Ouput ``` 11 x 1 y 3 x 1 y 3 12 x 3 y 5 x 3 y 5 dtype: int64 11 x 1 y 3 x 1 y 3 12 x 3 y 5 x ...
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10,418
improve documentation for pandas.Series.interpolate
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2015-06-23T20:33:59Z
2015-08-07T10:54:08Z
2015-08-07T10:54:07Z
CONTRIBUTOR
null
Close #10362 . Specify information on the use of index in pandas.Series.interpolate documentation.
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10,419
BUG: Fix value_counts name handling
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2
2015-06-23T21:27:25Z
2015-07-04T12:52:08Z
2015-06-27T03:51:56Z
MEMBER
null
Closes #10150. Also, made `test_base` have name attributes.
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10,420
Pandas Interpolate Does not Handle Empty Values at Front of Series
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2015-06-23T22:55:14Z
2020-11-12T23:44:11Z
2015-09-01T12:04:25Z
CONTRIBUTOR
null
[This code](https://github.com/pydata/pandas/blob/7d6fb510c1dfdbe7342f32f05ca5fd69b7854081/pandas/core/common.py#L1646) means the interpolator won't handle extrapolating to the front of the Series even though the underlying implementations may have no problem with the extrapolation. See for example [`UnivariateSpline...
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DOC: DataFrame Properties
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2015-06-23T23:15:39Z
2015-08-20T15:26:07Z
2015-08-20T15:26:07Z
CONTRIBUTOR
null
Added explanations for `axes` and `shape`
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90,569,390
MDExOlB1bGxSZXF1ZXN0Mzg0MDg2MzU=
10,422
BUG: GH9907 generate_range when start/end has higher resolution than offset
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3
2015-06-24T05:25:20Z
2015-06-30T10:53:45Z
2015-06-30T10:53:45Z
CONTRIBUTOR
null
To close #9907
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90,582,262
MDExOlB1bGxSZXF1ZXN0Mzg0MTE2MjQ=
10,423
Removed scikit-timeseries migration docs from FAQ
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6
2015-06-24T06:35:24Z
2015-06-24T10:54:52Z
2015-06-24T10:53:33Z
CONTRIBUTOR
null
Issue #10281
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90,588,756
MDU6SXNzdWU5MDU4ODc1Ng==
10,424
csv_read() fails on properly decoding latin-1(i.e. non utf8) encoded file from URL
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4
2015-06-24T07:05:36Z
2020-08-17T18:59:43Z
2020-08-17T18:59:43Z
NONE
null
### Problem Here is a problem that we had with a colleague, working on data available on a ftp (or http) server (internal network, we're sorry we can't have a proper example file to point to). Reading a csv file (with csv_read) encoded with non utf8 (like latin-1), with special character in header, fails to properly ...
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MDU6SXNzdWU5MDYxMzgyNw==
10,425
Pandas failing on Debian big-endian builds
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7
2015-06-24T08:49:32Z
2015-06-26T23:12:06Z
2015-06-26T23:12:06Z
CONTRIBUTOR
null
Hello, Package pandas is failing to build from source on Debian big-endian builds with following message: <pre> ====================================================================== FAIL: test_to_records (pandas.tests.test_categorical.TestCategoricalAsBlock) ----------------------------------------------------------...
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10,426
ERR: Timedelta('3.1415') should raise
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2015-06-24T12:39:34Z
2015-06-24T20:46:26Z
2015-06-24T20:46:26Z
CONTRIBUTOR
null
These are currently accepted, but parsed incorrectly. These don't have units, nor are of the standard format, so should raise as unparseable.
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90,665,273
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10,427
TST: Allow assert_numpy_array_equal to compare nan
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4
2015-06-24T12:43:06Z
2015-07-28T21:45:17Z
2015-07-28T21:45:17Z
MEMBER
null
Related to #10373. `pandas` `assert_array_equal` needs to be updated to perform `nan` comparison properly. ``` import numpy as np import pandas as pd import pandas.util.testing as pdt import numpy.testing.utils as npt npt.assert_array_equal(np.array([1, np.nan, 3]), np.array([1, np.nan, 3])) # no AssertionError pdt...
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90,668,244
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10,428
BUG: using .loc[:,column] fails type coercion when the object is a multi-index
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2015-06-24T12:52:36Z
2015-06-24T20:45:55Z
2015-06-24T20:45:55Z
CONTRIBUTOR
null
from [SO](http://stackoverflow.com/questions/31024821/pandas-dataframe-casting-to-timedelta-fails-with-loc)
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10,429
BUG: Timedeltas with no specified units (and frac) should raise, #10426
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0
2015-06-24T13:14:21Z
2015-06-24T20:46:26Z
2015-06-24T20:46:26Z
CONTRIBUTOR
null
closes #10426
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10,430
BUILD: 2.7 with numpy_dev currently broken
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0
2015-06-24T20:58:26Z
2015-06-25T01:10:34Z
2015-06-25T01:10:34Z
CONTRIBUTOR
null
seems a recent change in numpy master: https://github.com/numpy/numpy/issues/6014 I think might be a bug on numpy's part.
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MDExOlB1bGxSZXF1ZXN0Mzg1MDA5NjM=
10,431
BUG: provide categorical concat always on axis 0, #10430
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2015-06-25T00:10:49Z
2015-06-25T01:10:34Z
2015-06-25T01:10:34Z
CONTRIBUTOR
null
numpy 1.10 makes this an error for 1-d on axis != 0 closes #10430
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SciPy sprints
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2015-06-25T00:37:03Z
2015-08-21T08:27:34Z
2015-08-21T08:27:34Z
CONTRIBUTOR
null
@jreback, @shoyer, and @cpcloud will be at SciPy this year, and are going to host a sprint on July 11 (saturday). SciPy sprint pages is [here](http://scipy2015.scipy.org/ehome/115969/292867/?&) This issue will be the landing page for contributors. [pandas](http://pandas.pydata.org) is an open source, BSD-licensed li...
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10,433
BUG: closes bug in stack when index is not unique
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2015-06-25T02:08:32Z
2015-08-30T02:30:09Z
2015-08-08T12:18:12Z
CONTRIBUTOR
null
closes https://github.com/pydata/pandas/issues/10417
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10,434
Unclear UnicodeDecodeError exception.
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2015-06-25T02:37:20Z
2015-08-20T22:03:24Z
2015-08-20T22:03:14Z
NONE
null
`<type 'exceptions.UnicodeDecodeError'> at /token 'ascii' codec can't decode byte 0xd7 in position 0: ordinal not in range(128)` This is hard to understand. I finally figured out the issue, and it was that strings and floats are being compared. I suppose now the error message makes sense. This is an issue related to ...
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BUG: GH10365 in interpolate_1d when method is piecewise_polynomial
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2015-06-25T06:14:43Z
2015-08-21T01:37:30Z
2015-08-21T01:37:30Z
CONTRIBUTOR
null
Starting point for closing #10365. I only have the trivial case. I think this method (and perhaps other methods as well) needs #10383 for it to be useful.
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10,436
A squeezed empty DataFrame remains a DataFrame
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2018-10-21T01:26:07Z
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not_empty = pd.DataFrame([[None,None]],columns=['a', 'b']).squeeze() type(not_empty) empty_dim_1 = pd.DataFrame(columns=['a', 'b']).squeeze() type(empty_dim_1) empty_dim_0 = pd.DataFrame(index=['c', 'd']).squeeze() type(empty_dim_0)
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10,437
unexpected behaviour when reindexing a Panel with MultiIndex
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1
2015-06-25T08:46:59Z
2015-06-25T19:25:09Z
2015-06-25T19:24:09Z
NONE
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I was trying to reindex a Panel with a MultiIndex. The ultimate goal is to be able to do slicing like this: ``` wp.loc[(1,slice(None)),:,:] #Access the panel fixing the first index of the multiIndex ``` But whenever I try to reindex, like in this example I got this strange behaviour. ``` wp = pd.Panel(pd.randn(4, 5...
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10,438
BUG GH10425 test_categorical big-endian fix
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2015-06-25T09:07:31Z
2015-06-26T23:11:50Z
2015-06-26T23:11:50Z
CONTRIBUTOR
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BUG: Changing test_categorical to compare with native byte ordering instead of comparing with little-endian one closes #10425
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10,439
BUG: read_pickle and period data
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2015-06-25T13:21:46Z
2015-08-20T17:32:21Z
2015-08-20T17:32:21Z
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I can pickle dataframes with periods but after import Period format becomes corrupted. After pickle Period stride appears to be none instead of 'Q' in the following example. <pre><code> import pandas as pd df = pd.DataFrame({'period': [pd.Period('2014Q4')] * 5}) msk = df['period'] == pd.Period('2014Q4') print msk d...
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Setting values on slice of multi-index gives NaNs
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2015-06-25T17:11:59Z
2021-08-31T14:14:07Z
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Best shown with an example. ``` python import numpy as np, pandas as pd timestamps = map(pd.Timestamp, ['2014-01-01', '2014-02-01']) categories = ['A', 'B', 'C', 'D'] df = pd.DataFrame(index=pd.MultiIndex.from_product([timestamps, categories], names=['ts', 'cat']), columns=['Col1', 'Col2']) >>> df ...
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10,441
BUG: Bug fix implement __reduce__/__setstate__ for Period pickle support
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8
2015-06-25T17:56:15Z
2015-08-20T16:27:25Z
2015-08-20T16:24:10Z
NONE
null
Fix Period pickle issue https://github.com/pydata/pandas/issues/10439
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10,442
ENH: Convert datetimelike index to strings with astype(str)
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3
2015-06-25T19:00:18Z
2015-10-16T22:07:39Z
2015-10-16T22:07:39Z
MEMBER
null
xref #10110 - [x] Fix `.astype(str)` on `DatetimeIndex` to use call `.format()` (Index method) ~~\- [ ] Add `Series.dt.format()` accessor to call `.format()`~~ (#10110 does this with `.strftime`) - [x] Change `Series.astype(str)` to call equiv of `Series.dt.format()` for `datetime64[ns]` dtype Recently the ability t...
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10,443
ENH: Simplify using read_hdf for HDF files with one dataset
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2015-06-25T19:53:00Z
2015-07-13T13:22:12Z
2015-07-13T10:56:10Z
CONTRIBUTOR
null
Allow read_hdf to be used without a key when a single pandas object is stored in a HDF file. Raises if multiple pandas objects found.
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10,444
Better error message when using DataFrame.hist() without numerical columns
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2015-06-25T23:08:57Z
2019-05-24T15:47:02Z
2019-05-24T15:47:02Z
NONE
null
pandas version: 0.16.2 matplotlib version 1.4.3 (and produced different error message on older version) ``` python import numpy as np import pandas as pd df = pd.DataFrame(np.random.rand(10,2)) df_o = df.astype(np.object) df_o.hist() ``` ``` ValueError Traceback (most recent call last)...
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10,445
Cannot fill in empty Panel with DataFrame
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2
2015-06-26T10:52:48Z
2018-07-06T20:21:07Z
2017-07-10T21:07:10Z
NONE
null
I'm not sure this is a bug, but it bit me recently. I can fill-in an empty `DataFrame` with a `Series`: ``` In [1]: import pandas as pd In [2]: d = pd.DataFrame() In [3]: d[0] = pd.Series([1,2,3]) In [4]: d Out[4]: 0 0 1 1 2 2 3 ``` However, I cannot do the same for a `Panel`, even though it fails silently: ...
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10,446
DOC: splitting the IO docs into separate pages
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1
2015-06-26T12:55:57Z
2019-10-21T20:06:20Z
null
MEMBER
null
The documentation on the extensive pandas IO tools is currently one big page: http://pandas.pydata.org/pandas-docs/stable/io.html. I propose to split this in several files: a page with a general introduction to the IO tools, and then one page per format (writer/reader combo). (this could be seen as a first start for...
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10,447
BUG: Cannot store complex valued Series/DataFrame/Panel/Panel4D as 'table' to hdf
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2015-06-26T14:33:41Z
2015-07-13T12:42:41Z
2015-07-13T12:42:41Z
CONTRIBUTOR
null
Attempting to store a Panel4D of complext128 results in an error. This is true if I use table or fixed formats (different errors) [I am showing the last call from pandas as well as the actual error] ``` python pd.Panel4D(np.tile(np.array([1+1j,2+2j]),[2,2,2,1])).to_hdf('complex.h5','complex',format='t') Traceback (mo...
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10,448
Cython function group_var_float64 may return small negative values
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2015-06-26T16:14:25Z
2015-07-08T14:19:57Z
2015-06-26T18:07:27Z
CONTRIBUTOR
null
For certain well-chosen inputs, `group_var_float64` may return small negative values due to roundoff error. This then interferes with e.g. computing aggregate standard deviations: ``` python >>> import pandas as pd >>> import numpy as np >>> df = pd.DataFrame({'a': (0, 0, 0), 'b': 0.832845131556193 * np.ones(3)}) >>> ...
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10,449
Upsampling a time-series is missing an option to properly deal with the end
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2015-06-26T18:21:09Z
2020-05-11T02:05:55Z
null
CONTRIBUTOR
null
Consider the following: ``` index = pd.date_range("2015-01-01", "2015-01-01 02:00", freq="1H", closed="left") s = pd.Series(1, index=index) s.resample("15T", fill_method="ffill", closed="left") ``` The result looks like this <pre>2015-01-01 00:00:00 1 2015-01-01 00:15:00 1 2015-01-01 00:30:00 1 2015-01-01 0...
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10,450
DOC: GH10414 Missing example in NA values in GroupBy
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5
2015-06-26T20:04:35Z
2015-07-01T10:58:05Z
2015-07-01T10:58:05Z
CONTRIBUTOR
null
closes #10414
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91,459,326
MDU6SXNzdWU5MTQ1OTMyNg==
10,451
BUG: display.precision option seems off-by-one
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9
2015-06-27T12:39:39Z
2015-08-02T21:26:30Z
2015-08-02T21:26:30Z
CONTRIBUTOR
null
I may very well be wrong on this, given how common an option it seems, but I am surprised that the "display.precision" option seems to limit the digits after the decimal to one less than specified. ``` python In [1]: x = pd.Series(np.random.randn(5)) In [2]: x Out[2]: 0 -0.163960 1 1.016273 2 0.861317 3 -...
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10,452
API/BUG: SparseSeries.shape ignores fill_value
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3
2015-06-27T13:43:35Z
2016-03-30T12:39:02Z
2016-03-30T12:39:02Z
MEMBER
null
`SparseSeries.shape` seems to return incorrect result ignoring shapes filled by `fill_value`. ``` s = pd.SparseSeries([0, 0, 1, 0], fill_value=0) s #0 0 #1 0 #2 1 #3 0 # dtype: int64 # BlockIndex # Block locations: array([2], dtype=int32) # Block lengths: array([1], dtype=int32) len(s) #4 # must be (4, )...
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91,475,152
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10,453
DOC: fixed docstrings for StringMethods ljust and rjust
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1
2015-06-27T14:36:26Z
2015-06-27T14:40:08Z
2015-06-27T14:39:07Z
CONTRIBUTOR
null
Very minor fix but `str.ljust()` and `str.rjust()` have broken links in the docstrings. You can see in http://pandas.pydata.org/pandas-docs/version/0.16.2/generated/pandas.Series.str.ljust.html#pandas.Series.str.ljust that it should be linking to `str.ljust()` instead of `str.right()` (which doesn't exist)
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10,454
Attempt to fix issue #10366 encoding and categoricals hdf serialization.
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9
2015-06-27T14:47:44Z
2015-08-22T20:21:50Z
2015-08-22T20:21:50Z
CONTRIBUTOR
null
closes #10366 . Probably not quite the right approach but want to run travis. Tests are a bit weak at this point (just testing for non-exceptions). Encoding issues might be relevant to other types besides categoricals (but categoricals raise exceptions when strings to mangled to non-uniqueness).
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10,455
Add odo to ecosystem docs
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4
2015-06-27T15:53:09Z
2015-06-27T19:04:43Z
2015-06-27T19:04:42Z
MEMBER
null
closes ContinuumIO/odo#244
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91,523,220
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10,456
DOC: Add warning for newbs not to edit auto-generated file
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9
2015-06-27T22:17:06Z
2015-07-07T17:40:57Z
2015-07-07T16:36:14Z
CONTRIBUTOR
null
@jreback, here is the proposed changed we talked about in [this PR](https://github.com/pydata/pandas/pull/10337#issuecomment-111822584) for other fellow newbs that make the same mistake I did. You said "and more importantly prob a note in `internals.rst` about how/what to change", but I didn't understand that. `inter...
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10,457
Can't get it to read a csv
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14
2015-06-27T22:53:48Z
2018-09-01T02:23:51Z
2015-06-28T00:46:52Z
NONE
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Typed in pd.read_csv('Department_of_Recreation_and_Parks_Facility_and_Park_Information.csv') and get this back: -bash: syntax error near unexpected token `'Department_of_Recreation_and_Parks__Facility_and_Park_Information.csv'' The file exists in the folder
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10,458
TST/CLN: remove assert_isinstance
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2015-06-28T00:04:07Z
2015-06-30T13:03:04Z
2015-06-30T10:46:13Z
MEMBER
null
`testing.py` has `assert_isinstance` and `assertIsInstance` duplicately, and each test case uses either of them by choice. Changed to use `assertIsInstance` in all cases, and make `assert_isinstance` show warning.
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10,459
Timestamp.to_datetime() crashes with win32timezone.TimeZoneInfo objects
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4
2015-06-28T00:32:29Z
2020-01-01T16:02:30Z
2020-01-01T15:57:28Z
NONE
null
Thanks to the wonders of duck typing, `pandas.Timestamp` happily accepts `pywintypes.TimeType` objects (otherwise known as `pywintypes.datetime`), including those that employ the `win32timezone.TimeZoneInfo` object. And most methods work. For some reason, `to_datetime` does not, and indeed it crashes: ``` import pan...
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10,460
BUG/API: MultiIndex.get_level_values created from Categorical raises AttributeError
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1
2015-06-28T00:58:28Z
2015-07-01T13:46:10Z
2015-07-01T13:46:10Z
MEMBER
null
``` import pandas as pd import numpy as np levels = ['foo', 'bar', 'baz', 'qux'] codes = np.random.randint(0, 4, size=100) cats = pd.Categorical.from_codes(codes, levels, name='myfactor', ordered=True) data = pd.DataFrame(np.random.randn(100, 4)) grouped = data.groupby(cats) desc_result = grouped.describe() desc_resu...
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10,461
API: MultiIndex.get_level_values should have label only / level only mode?
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9
2015-06-28T01:04:10Z
2021-04-18T07:09:14Z
null
MEMBER
null
Currently, `MultiIndex.get_level_values` handles both names and levels, it return different levels depending on its name (like `.ix`). Adding an option (or separate method) like `.loc` and `.iloc` to avoid any unexpected results? ``` idx = pd.MultiIndex.from_tuples([(1, 'A'), (2, 'B')]) idx.get_level_values(0) # Int64...
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10,462
BUG: #10445 cannot add DataFrame to empty Panel
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10
2015-06-28T06:11:29Z
2015-10-12T01:32:14Z
2015-10-11T16:00:58Z
CONTRIBUTOR
null
closes #10445 I based this bugfix off how DataFrame handles the analogous situation ‒ being intialized to empty and then having a series added (cf. [DataFrame._ensure_valid_index](https://github.com/pydata/pandas/blob/master/pandas/core/frame.py#L2167))
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91,582,007
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10,463
Feature proposal: pandas vectorize decorator
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13
2015-06-28T10:10:14Z
2015-06-28T11:57:45Z
2015-06-28T10:57:04Z
CONTRIBUTOR
null
`numpy` has a very useful `vectorize` decorator: http://docs.scipy.org/doc/numpy/reference/generated/numpy.vectorize.html that allows writing a function for scalars and then pass in arrays transparently. Under the hood, the function is called multiple times on subsets of the data. I'm currently writing code that opera...
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10,464
BUG: Series.map using categorical Series raises AttributeError
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2015-06-28T11:03:24Z
2015-07-01T13:47:52Z
2015-07-01T13:46:10Z
MEMBER
null
Closes #10324. Closes #10460. Based on #9848, using `.get_values` should be avoided?
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10,465
BUG: MultiIndex.get_level_values created from Categorical raises AttributeError
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1
2015-06-28T11:22:03Z
2015-06-28T13:22:06Z
2015-06-28T13:18:30Z
MEMBER
null
Closes #10460. xref: #10464.
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10,466
ENH: Add pipe method to GroupBy (fixes #10353)
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21
2015-06-28T19:51:19Z
2015-12-06T19:09:55Z
2015-12-06T19:09:55Z
NONE
null
closes #10353, extends the "pipe" method to a GroupBy object to allow one to chain it with NDFrame.pipe calls - Moves the functionality of "pipe" from NDFrame into generics._pipe to avoid code duplication - Leverages this in GroupBy object - Adds unit test
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10,467
BUG: read_csv: invalid index from header-only input file with multiindex.
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3
2015-06-29T10:28:49Z
2015-07-07T09:30:45Z
2015-07-07T09:30:45Z
CONTRIBUTOR
null
``` Python import pandas as pd import cStringIO as stringio df = pd.read_csv(stringio.StringIO("x,y,z"), index_col=["x", "y"]) print df.columns print df.index.names ``` Output: ``` $ python x.py Index([u'y'], dtype='object') [u'x', u'y'] ``` Expected column name is "z". ## INSTALLED VERSIONS commit: 01995b2c2c759c...
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91,768,396
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10,468
Iterating over groups skips groups with nan in the name
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8
2015-06-29T10:35:38Z
2017-12-19T20:06:47Z
2015-06-29T11:07:26Z
CONTRIBUTOR
null
Today I discovered a strange behaviour when iterating over groups where the group name contains a nan. Take the following data frame and group it. As expected there are two groups: ``` python In [1]: df = pd.DataFrame([['a', 1, 1], ['b', sp.nan, 2]], columns = ['a', 'b', 'c']) In [2]: grouped = df.groupby(['a', 'b'])...
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MDExOlB1bGxSZXF1ZXN0Mzg3NzQ3NTU=
10,469
BUG: Fix csv_read bugs when using empty input. GH10467 & GH10413
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6
2015-06-29T13:45:00Z
2015-07-07T09:30:45Z
2015-07-07T09:30:45Z
CONTRIBUTOR
null
closes #10413 closes #10467
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91,828,422
MDU6SXNzdWU5MTgyODQyMg==
10,470
CLN: StringIO from io instead of from StringIO
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8
2015-06-29T14:56:39Z
2019-04-05T06:54:16Z
2019-04-05T06:54:05Z
CONTRIBUTOR
null
It looks like `io` is available from 2.6 onward. Can I move the importing out of `compat` (and replaces any `cStringIO` with `StringIO`)? `StringIO.StringIO` doesn't always do the same thing as `io.StringIO`.
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10,471
test_set_locale fails if LC_ALL is set outside
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1
2015-06-29T17:19:03Z
2021-04-18T07:13:19Z
2021-04-18T07:13:19Z
CONTRIBUTOR
null
``` ~/pandas-0.16.2+git58-g01995b2# LC_ALL=C.UTF-8 nosetests3 -s -v /tmp/buildd/pandas-0.16.2+git58-g01995b2/debian/tmp/usr/lib/python3/dist-packages/pandas/tools/tests/test_util.py test_datetimeindex (pandas.tools.tests.test_util.TestCartesianProduct) ... ok test_simple (pandas.tools.tests.test_util.TestCartesianProdu...
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10,472
ENH: Make group_var_ use Welford's algorithm.
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6
2015-06-29T17:23:27Z
2015-07-08T21:19:54Z
2015-07-08T14:19:41Z
CONTRIBUTOR
null
closes #10448 This PR reimplements the Cython functions `group_var_float64` and `group_var_float32` to use Welford's algorithm, rather than the sum-of-squares method, which is numerically unstable. This came up in #10448; see also #10242 for more discussion.
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10,473
BUG: Enable complex values to be written to HDF
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5
2015-06-29T19:27:56Z
2015-07-13T13:22:09Z
2015-07-13T12:42:41Z
CONTRIBUTOR
null
Enable table format to be used to store complex values in DataFrames, Panels and Panel4Ds. Add tests for both fixed and panel. Add exception when attempting to write Series with complex values. closes #10447
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10,474
Feature Request: Add support for 'Allow Large Results' to BigQuery connector
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2015-06-29T21:44:36Z
2017-02-26T20:22:29Z
2017-02-26T20:11:08Z
NONE
null
gbq.py currently returns an error if the result of a query is what Google considers to be 'Large'. The google api allows jobs to be sent with a flag to allow large results. It would be very beneficial to provide this as an option in the BigQuery connector.
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10,475
Series.shift speed up
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2015-06-30T13:14:38Z
2020-03-31T04:55:31Z
2020-03-31T04:55:31Z
NONE
null
Series.shift() is slow when freq parameter is supplied ``` ts = pd.util.testing.makeTimeSeries(10000) ts.shift(5, 'D') # takes 0.5 sec ts.shift(5, np.timedelta64(1, 'D')) # takes 0.16 sec ts2 = ts.copy() ts2.index = ts.index + np.timedelta64(5, 'D') # takes < 0.001 sec ```
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10,476
read_csv python engine errors
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4
2015-06-30T15:40:42Z
2016-05-25T12:09:25Z
2016-05-25T12:09:25Z
CONTRIBUTOR
null
Only thing I changed from my usually working reduction pipeline is to try `engine="python"` (because I wanted to use `nrows` for a smaller test-read, but that fails as well, and I thought maybe the python engine is buggy currently): ``` python $ python reduction.py ~/data/planet4/2015-06-21_planet_four_classifications...
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10,477
API: add DatetimeBlockTZ #8260
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2015-06-30T15:44:09Z
2015-09-05T16:17:23Z
2015-09-05T16:17:23Z
CONTRIBUTOR
null
closes #8260 closes #10763 ToDos: - [x] doc updates - [x] test with `Series.dt.*` - [x] test with csv/HDF5 - [x] nat setting borked ATM - [x] HDF5 example from 0.16.2 ~~\- [ ] get_values/values - make consistent~~ ~~\- [ ] maybe move `DatetimeTZBlock.shift` mostly to `DatetimeIndex.shift`~~ Also - This cleans up t...
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10,478
test_concat_categorical fails on 32bit
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1
2015-06-30T19:55:38Z
2015-06-30T21:21:14Z
2015-06-30T21:21:01Z
CONTRIBUTOR
null
``` ====================================================================== FAIL: test_concat_categorical (pandas.tests.test_categorical.TestCategoricalAsBlock) ---------------------------------------------------------------------- Traceback (most recent call last): File "/tmp/buildd/pandas-0.16.2+git58-g01995b2/debia...
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10,479
Fix docstring for na_values in parsers
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2015-07-01T04:52:03Z
2015-07-02T04:17:15Z
2015-07-01T10:53:21Z
CONTRIBUTOR
null
I discovered entirely by accident that the `na_values` in `pd.read_*` can be a string. According to the docstring, it can only be a sequence or a dict. This PR fixes that.
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10,480
numeric_only inconsistency with pandas Series
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11
2015-07-01T09:32:27Z
2018-01-01T12:16:33Z
2016-09-28T10:08:51Z
CONTRIBUTOR
null
``` In [1]: import pandas as pd In [2]: pd.Series([1,2,3]).sum(numeric_only=False) Out[2]: 6 In [3]: pd.Series([1,2,3]).sum(numeric_only=True) --------------------------------------------------------------------------- NotImplementedError Traceback (most recent call last) <ipython-input-3-2c46bd...
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10,481
DOC: na_fvalues argument for read_csv not documented in docstring
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10,482
BUG: Index doesn't take over the Categorical name
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2015-07-01T14:34:48Z
2015-07-20T01:46:53Z
2015-07-20T01:46:53Z
MEMBER
null
`Series` can take over the `Categorical.name`. ``` import pandas as pd c = pd.Categorical([1, 2, 3], name='xxx') pd.Series(c) #0 1 #1 2 #2 3 # Name: xxx, dtype: category # Categories (3, int64): [1, 2, 3] ``` But `Index` doesn't. ``` pd.Index(c) # CategoricalIndex([1, 2, 3], categories=[1, 2, 3], ordered=Fa...
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10,483
Series.from_csv not loading header names
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2015-07-01T19:47:21Z
2015-07-07T15:52:31Z
2015-07-07T15:52:31Z
CONTRIBUTOR
null
Series.from_csv at the moment does not load the series.name and series.index.name when the header keyword argument is stated. This was introduced in 6078fba9410918baa486ca008cc9e3ba066c03ec. The issue was that `Series.from_csv` uses `DataFrame.from_csv`, which automatically indexes columns (in practice, the index col...
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10,484
BUG: partial nan levels missing when grouping
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2015-07-01T23:15:31Z
2019-10-21T20:07:56Z
null
CONTRIBUTOR
null
from #10468 ``` In [40]: df = DataFrame({'A' : [1,2,3]},index=pd.MultiIndex.from_tuples([(1,np.nan),(1,1),(2,1)],names=['first','second'])) In [41]: df Out[41]: A first second 1 NaN 1 1 2 2 1 3 In [42]: df.groupby(level='second').sum() Out[42]: A second 1 ...
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10,485
More descriptive ylabel for Series.hist()
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2015-07-01T23:19:02Z
2015-07-15T11:13:35Z
2015-07-15T11:13:35Z
CONTRIBUTOR
null
``` s = pd.Series(np.random.randn(100)) s.plot(kind='hist') s.hist() ``` Running `s.plot(kind='hist')` labels the y axis with the word 'Degree'. A more informative label might be 'count', 'frequency', or 'density'. Also, it seems strange that `s.plot(kind='hist')` and `s.hist()` produce plots with different labels / ...
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10,486
BUG: query with invalid dtypes should fallback to python engine
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2015-07-01T23:50:49Z
2016-05-07T17:12:30Z
2016-05-07T17:12:30Z
NONE
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The following call of `df.query()` produces an error: ``` ... File "/Applications/anaconda/lib/python3.4/site-packages/numexpr/necompiler.py", line 629, in getType raise ValueError("unkown type %s" % a.dtype.name) ValueError: unkown type str128 ``` in pandas 0.15.2 ``` # -*- coding: utf-8 -*- import re import panda...
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10,487
Small style consistency fix
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1
2015-07-02T03:25:40Z
2015-07-02T07:11:17Z
2015-07-02T07:11:14Z
CONTRIBUTOR
null
Removed unneeded spaces in kwargs related to read_gbq()
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10,488
DOC: Better explain the behaviour of na_values
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1
2015-07-02T04:17:02Z
2015-07-02T07:42:55Z
2015-07-02T07:42:55Z
CONTRIBUTOR
null
According to the suggestion of @jorisvandenbossche from https://github.com/pydata/pandas/pull/10479, changing some wording in the docs.
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10,489
Pandas: why pandas.Series.std() is quite different from numpy.std()
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1
2015-07-02T06:30:27Z
2015-07-02T07:15:40Z
2015-07-02T07:15:40Z
NONE
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I got two snippets code as follows. > > numpy.std([766897346, 766897346, 766897346, 766897346, 766897346, 766897346, 766897346, 766897346, 766897346, 766897346]) > > > > 0 > > > > pd.Series([766897346, 766897346, 766897346, 766897346, 766897346, 766897346, 766897346, 766897346, 766897346, 766897346]).std(ddof=0) > >...
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10,490
TST/ERR: GH10369 read_msgpack checks argument type
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2015-07-02T12:44:12Z
2015-07-03T11:58:57Z
2015-07-03T11:58:52Z
CONTRIBUTOR
null
To close #10369
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10,491
DOC: cookbook for in-memory HDFStores usage
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5
2015-07-02T16:25:38Z
2018-11-28T21:03:51Z
null
NONE
null
When writing a DataFrame to hdf format ('to_hdf' method) you cannot pass a file handle instead of a string. i.e. you can't: ``` python with open('test.hdf') as f: df.to_hdf(f, "df") ``` This raises an error: ``` Traceback (most recent call last): File "<stdin>", line 2, in <module> File "C:\Anaconda\lib\site...
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10,492
DOC: Distinguish between different types of boolean indexing
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2015-07-02T17:00:45Z
2020-10-08T01:23:14Z
2020-10-08T01:23:14Z
CONTRIBUTOR
null
It's not clear from the docs that indexing with a boolean `ndarray` isn't the same as indexing with a boolean `Series`. It took me a while to realise that: ``` python import pandas as pd df = pd.DataFrame([[1, 2], [3, 4], [5, 6]], list('abc'), ['one', 'two']) sr = (df['one'] > 2) df.loc[sr, 'two'] # This is ok df...
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ENH: GH10485 'Frequency' label for Series.plot
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2015-07-02T17:36:05Z
2015-07-11T06:45:10Z
2015-07-11T06:45:10Z
CONTRIBUTOR
null
More informative label for histogram. Conversation in #10485
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10,494
BUG: convert_objects(convert_dates='coerce') fails on single-valued series
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2015-07-03T09:02:39Z
2015-07-03T11:57:42Z
2015-07-03T11:57:26Z
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With an unconvertible value (like e.g. "2014-12-32"), `convert_objects(convert_dates='coerce')` is supposed to return `NaT`. When run on a series with a single unconvertible value it gives back the original string instead. ``` python >>> from pandas import Series >>> Series(['2014-12-32']).convert_objects(convert_date...
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10,495
.shift() on Categorical raises "'Categorical' object has no attribute 'flags'"
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2015-07-03T13:01:56Z
2015-07-06T12:44:38Z
2015-07-06T12:44:38Z
CONTRIBUTOR
null
Not sure if this is related to #10324 . Running master with python 3.4.3. ``` python import pandas values = ['a', 'b', 'c', 'd'] a = pandas.Series(values) b = pandas.Series(values, dtype='category') print(a.shift()) # ok print(b.shift()) # error ``` Error looks like this: ``` $ python f.py 0 NaN 1 a 2 ...
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10,496
read_table / read_csv with duplicate names leads to column duplication
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2015-07-03T13:35:55Z
2015-07-17T16:15:56Z
2015-07-17T16:15:55Z
NONE
null
When reading a table while specifying duplicate column names - let's say two different names - pandas 0.16.1 will copy the last two columns of the data over and over again. I opened a thread on this here: http://stackoverflow.com/questions/31207560/pandas-read-table-with-duplicate-names Is this a bug or an intended b...
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10,497
BUG: CategoricalBlock shift GH9416
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4
2015-07-03T13:42:01Z
2015-07-18T00:03:30Z
2015-07-18T00:03:27Z
CONTRIBUTOR
null
Should resolve #9416. CategoricalBlocks always seem to have ndim=1, even if multiple categoricals are in a frame with the same categories. This simplifies the axis shift logic somewhat. Note that dataframe shift with axis=1 still doesn't work with multiple categorical columns, since they are each a different block.
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92,879,181
MDExOlB1bGxSZXF1ZXN0MzkxNzYyMjc=
10,498
Add test and fix for categorical series .shift #10495.
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3
2015-07-03T13:42:13Z
2015-07-06T12:45:10Z
2015-07-06T12:45:10Z
CONTRIBUTOR
null
#10495 Waiting for Travis and will review further.
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https://api.github.com/repos/pandas-dev/pandas/issues/10499
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92,880,365
MDExOlB1bGxSZXF1ZXN0MzkxNzY4MzQ=
10,499
Updated to_hdf doc string
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1
2015-07-03T13:50:30Z
2015-07-03T19:36:00Z
2015-07-03T19:35:54Z
NONE
null
Updated the docstring to make clear that a HDFStore is required for a buffer, if a path is not directly passed. See issue #10491
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https://api.github.com/repos/pandas-dev/pandas/issues/10500
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92,892,258
MDExOlB1bGxSZXF1ZXN0MzkxODIwODk=
10,500
TST: DataFrame.quantile should have Float64Index
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2
2015-07-03T15:04:30Z
2015-07-04T12:49:42Z
2015-07-04T11:29:41Z
MEMBER
null
The result of `DataFrame.quantile` should have `Float64Index` as below, but current test case doesn't check it. ``` import pandas as pd pd.DataFrame([1, 2, 3, 4]).quantile([0.5, 0.75]).index # Float64Index([0.5, 0.75], dtype='float64') ```
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https://api.github.com/repos/pandas-dev/pandas/issues/10501
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92,894,021
MDExOlB1bGxSZXF1ZXN0MzkxODI4MTU=
10,501
TST: Fix test for datetime categorical
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2
2015-07-03T15:15:40Z
2015-07-06T12:59:19Z
2015-07-06T12:54:05Z
MEMBER
null
Related to #10465, but different part. Current `test_groupby_datetime_categorical` in `test_groupby.py` is incorrect, the actual result returns `CategoricalIndex` as level 0, otherwise expected result uses `DatetimeIndex` as level 0. Changed to use the same dtype and added explicit comparison. ### Actual Result (curre...
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92,898,558
MDExOlB1bGxSZXF1ZXN0MzkxODQ1MDE=
10,502
CLN: remove na_fvalues from TextFileReader (read_csv et al) signature (GH10481)
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2
2015-07-03T15:41:16Z
2015-07-13T13:14:25Z
2015-07-13T13:14:25Z
MEMBER
null
Closes #10481
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