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https://api.github.com/repos/pandas-dev/pandas/issues/7401
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35,279,505
MDU6SXNzdWUzNTI3OTUwNQ==
7,401
unstack with DatetimeIndex with NaN gives "ValueError: cannot convert float NaN to integer"
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9
2014-06-09T12:06:31Z
2016-10-12T23:04:56Z
2015-01-26T01:29:07Z
MEMBER
null
With following code: ``` df = pd.DataFrame({'A': list('aaaaabbbbb'), 'B':pd.date_range('2012-01-01', periods=5).tolist()*2, 'C':np.zeros(10)}) df.iloc[3,1] = np.NaN df = df.set_index(['A', 'B']) ``` unstacking gives: ``` In [6]: df.unstack() -------------------------------------...
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https://api.github.com/repos/pandas-dev/pandas/issues/7402
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35,281,981
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7,402
BUG: ix should return a Series for duplicate indices (GH7150)
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2014-06-09T12:54:30Z
2014-06-15T23:54:11Z
2014-06-09T13:16:42Z
CONTRIBUTOR
null
closes #7150
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https://api.github.com/repos/pandas-dev/pandas/issues/7403
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35,283,431
MDU6SXNzdWUzNTI4MzQzMQ==
7,403
BUG: incorrect unstacking with NaNs in the index
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2
2014-06-09T13:17:35Z
2016-10-12T23:04:56Z
2015-01-26T01:29:07Z
MEMBER
null
Related to #7401, but another issue I think. Some more strange behaviour with NaNs in the index when unstacking (but now not specifically to datetime). First case: ``` In [9]: df = pd.DataFrame({'A': list('aaaabbbb'), ...: 'B':range(8), ...: 'C':range(8)}) In [10]: df.set_...
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https://api.github.com/repos/pandas-dev/pandas/issues/7404
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35,283,558
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7,404
BUG: mi indexing bugs (GH7399,GH7400)
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0
2014-06-09T13:20:02Z
2014-06-15T23:53:41Z
2014-06-09T15:47:18Z
CONTRIBUTOR
null
closes #7399 closes #7400
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35,287,154
MDU6SXNzdWUzNTI4NzE1NA==
7,405
BUG: unstacking with partial selection and mixed dtype gives "ValueError: shape of passed values ..."
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1
2014-06-09T14:07:12Z
2016-10-12T23:04:56Z
2015-01-26T01:29:07Z
MEMBER
null
And yet another unstacking bug (but now not related to NaNs as in #7403). Getting a `ValueError: Shape of passed values is (2, 3), indices imply (2, 5)` (where 3 is the correct one, 5 is the original number of rows) in some specific conditions with mixed dtype and selection of the rows: ``` In [23]: df = pd.DataFrame(...
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35,288,458
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7,406
repr of MultiIndexed frame with NaT as the first element of level 0 of the index raises during repr
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0
2014-06-09T14:23:31Z
2014-06-09T22:34:38Z
2014-06-09T22:34:38Z
MEMBER
null
world's longest PR title, for a very strange bug ``` In [145]: idx = pd.to_datetime([pd.NaT] + pd.date_range('20130101', periods=2).tolist()) In [146]: idx Out[146]: <class 'pandas.tseries.index.DatetimeIndex'> [NaT, ..., 2013-01-02] Length: 3, Freq: None, Timezone: None In [149]: df = DataFrame({'X': range(len(idx)...
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35,292,004
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7,407
BUG: Series.get w boolean accessor
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0
2014-06-09T15:03:32Z
2014-07-01T16:02:12Z
2014-07-01T16:02:12Z
CONTRIBUTOR
null
from ML: https://groups.google.com/forum/#!topic/pydata/CDnF9cNR2ho ``` In [10]: df=pd.DataFrame({'i':[0]*10, 'b':[False]*10}) In [11]: vc_i=df.i.value_counts() In [12]: vc_i.get(99,default='Missing') Out[12]: 'Missing' In [13]: vc_b=df.b.value_counts() In [14]: vc_b Out[14]: False 10 dtype: int64 In [15]: vc...
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35,292,271
MDU6SXNzdWUzNTI5MjI3MQ==
7,408
incorrect slicing for negative indexers in datetimeindex
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1
2014-06-09T15:06:18Z
2014-06-09T22:35:29Z
2014-06-09T22:35:29Z
MEMBER
null
got a fix coming in a minute or so just wanted to track the issue related #7406
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7,409
multiindex repr of datetime nat is incorrect
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1
2014-06-09T15:10:34Z
2014-06-09T22:35:41Z
2014-06-09T22:35:41Z
MEMBER
null
related to #7406, #7401
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35,292,765
MDExOlB1bGxSZXF1ZXN0MTY4ODk4MjI=
7,410
BUG: fix repring of nat multiindex and fix neg indexing in datetimeindex
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3
2014-06-09T15:11:54Z
2014-06-13T05:13:24Z
2014-06-09T22:34:38Z
MEMBER
null
closes #7406, #7408, #7409
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35,299,910
MDU6SXNzdWUzNTI5OTkxMA==
7,411
BUG: Series/Dataframe has bad repr for Right-To-Left (RTL) data
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16
2014-06-09T16:29:29Z
2021-03-09T12:57:57Z
null
NONE
null
This code ``` python df=pd.DataFrame([['שלום','עליכם', 'מלאכי השלום', 'ברוכים הבאים']]) df.columns=['A','B','C','D'] df ``` does this: ![pd1](https://cloud.githubusercontent.com/assets/7840018/3219038/5fdea906-eff1-11e3-8e70-62cc8f692516.png) See that the data row is close to the right? Half a workaround is to pre...
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35,302,134
MDU6SXNzdWUzNTMwMjEzNA==
7,412
Option to keep left/right join columns (or add _merge column) to merge() and concat()
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9
2014-06-09T16:54:12Z
2016-03-25T01:13:39Z
2014-07-23T03:18:11Z
CONTRIBUTOR
null
Hello! I just heard from a colleague that they're looking for the analogue of STATA's merge command (http://www.stata.com/help.cgi?merge) which generates a `_merge` column that includes a code which specifies in an outer join whether the row existed in the right table, the left table or both. I know you can hack your ...
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35,346,273
MDU6SXNzdWUzNTM0NjI3Mw==
7,413
DOC: clarify the behavior of the .as_matrix method
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15
2014-06-10T03:06:27Z
2016-10-12T23:04:56Z
2014-06-14T08:36:47Z
CONTRIBUTOR
null
When using `df.as_matrix()` method, rows and columns do not render as 1xN or Nx1 matricies, rather as 1xN arrays. ``` In [4]: df.ix['foo']=[5,3] In [5]: df.ix['bar']=[2,6] In [6]: df Out[6]: A B foo 5 3 bar 2 6 [2 rows x 2 columns] In [7]: df['A'].as_matrix() Out[7]: array([ 5., 2.]) In [8]: df.ix['foo...
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35,370,894
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7,414
TST7337: Fix more tests in windows
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3
2014-06-10T10:58:11Z
2014-06-12T20:12:48Z
2014-06-10T12:45:03Z
CONTRIBUTOR
null
Hopefully final attempt at fixing the windows test issues from dateutil timezone work. Related discussion on previous pull request [here](https://github.com/pydata/pandas/pull/7362).
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MDU6SXNzdWUzNTM3MzIwNg==
7,415
BUG: nanops._ensure_numeric can't handle object dtypes containing complex objects
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2
2014-06-10T11:36:08Z
2014-06-22T15:29:59Z
2014-06-22T15:29:36Z
CONTRIBUTOR
null
`nanops._ensure_numeric` is used to make sure ndarrays are a numeric dtype. However, it can't handle the case where the dtype is `object` and one or more of the axes is `complex`: ``` Python >>> from pandas.core.nanops import nanmean >>> import numpy as np >>> >>> value = np.vstack([np.array(np.nan).astype('O'), np....
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MDExOlB1bGxSZXF1ZXN0MTY5NDQ1MzI=
7,416
BUG/DTYPES: preserve bools in convert_objects
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16
2014-06-10T14:54:38Z
2014-06-13T05:13:26Z
2014-06-10T21:52:01Z
MEMBER
null
closes #7126
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7,417
DOC: update df.as_matrix and df.values. Closes gh7413
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3
2014-06-10T15:41:11Z
2015-01-17T05:25:19Z
2014-06-14T08:36:00Z
CONTRIBUTOR
null
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7,418
BUG: hour/hours (and other plurals) should the same as singulars
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9
2014-06-10T16:01:20Z
2021-04-11T04:46:21Z
null
CONTRIBUTOR
null
discovered in #5292 This seems odd to me, documented anywhere? ``` In [2]: t = pd.Timestamp('2014-06-10 8am') In [3]: t + pd.DateOffset(hour=9) Out[3]: Timestamp('2014-06-10 09:00:00', tz=None) In [4]: t + pd.DateOffset(hours=9) Out[4]: Timestamp('2014-06-10 17:00:00', tz=None) ``` note that ``` t + pd.offsets.Ho...
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35,419,028
MDU6SXNzdWUzNTQxOTAyOA==
7,419
openpyxl version issue for things that depend on pandas
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6
2014-06-10T19:59:18Z
2014-06-18T20:05:35Z
2014-06-10T20:08:29Z
MEMBER
null
ML conversation: https://groups.google.com/forum/#!topic/pydata/gontRY254Xo
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https://api.github.com/repos/pandas-dev/pandas/issues/7420
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35,420,873
MDU6SXNzdWUzNTQyMDg3Mw==
7,420
TST: test failures on 3.4/windows for timezones
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17
2014-06-10T20:19:00Z
2014-06-17T00:18:00Z
2014-06-17T00:18:00Z
CONTRIBUTOR
null
``` ====================================================================== ERROR: test_string_index_alias_tz_aware (pandas.tseries.tests.test_timezones.TestTimeZoneSupportDateutil) ---------------------------------------------------------------------- Traceback (most recent call last): File "c:\Users\Jeff Reback\Doc...
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https://api.github.com/repos/pandas-dev/pandas/issues/7421
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35,423,338
MDExOlB1bGxSZXF1ZXN0MTY5NjQzNzc=
7,421
PERF: Series.transform speedups (GH6496)
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0
2014-06-10T20:44:05Z
2014-06-12T17:45:45Z
2014-06-11T14:06:07Z
CONTRIBUTOR
null
closes #6496 turns out indexing into an array rather than building it up as a list using `concat` is faster (but have to be careful of type changes). ``` # this PR In [11]: %timeit df['signal'].groupby(g).transform(np.mean) 10 loops, best of 3: 158 ms per loop # master In [11]: %timeit df['signal'].groupby(g).transf...
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35,423,895
MDU6SXNzdWUzNTQyMzg5NQ==
7,422
to_sql if_exists argument with SQL server and other schema
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20
2014-06-10T20:50:01Z
2014-09-05T13:19:53Z
2014-09-05T13:19:53Z
NONE
null
The `if_exists` argument of the `to_sql` function doesn't check all schema for the table while checking if it exists. Furthermore, it inserts to the default schema, causing somewhat contradictory behavior. For example, while using SQL Server with my default schema set to `test`, `to_sql` inserts the table into `test.t...
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https://api.github.com/repos/pandas-dev/pandas/issues/7423
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35,438,278
MDU6SXNzdWUzNTQzODI3OA==
7,423
value counts NaT doesn't count as NaN
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0
2014-06-10T23:58:08Z
2014-06-17T12:01:37Z
2014-06-17T12:01:37Z
CONTRIBUTOR
null
fix on the way. ``` dt = pd.to_datetime(['NaT', '2014-01-01']) value_counts(dt) # should have one entry ``` (Actually there is an issue with timedeltas too (you can't create an timedelta index.)
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7,424
FIX value_counts should skip NaT
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9
2014-06-11T00:00:33Z
2014-06-17T15:21:34Z
2014-06-17T12:01:37Z
CONTRIBUTOR
null
fixes #7423 fixes #5569.
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35,438,597
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7,425
time delta index
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5
2014-06-11T00:03:45Z
2014-06-11T07:15:21Z
2014-06-11T07:15:21Z
CONTRIBUTOR
null
You can't seem to create a time delta index, even if you force object dtype: ``` In [4]: td = pd.Series([np.timedelta64(10000), pd.NaT], dtype='timedelta64[ns]') In [5]: pd.Index(td) Out[5]: Int64Index([10000, -9223372036854775808], dtype='int64') In [6]: pd.Index(td, dtype= 'timedelta64[ns]') Out[6]: Int64Index([10...
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35,444,020
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7,426
ENH: Create dataframes using every combination of given values, like R's expand.grid()
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1
2014-06-11T02:04:08Z
2014-06-25T05:01:27Z
2014-06-25T05:01:27Z
CONTRIBUTOR
null
I find R's `expand.grid()` function quite useful for quick creation of example datasets. For example: ``` R expand.grid(height = seq(60, 70, 5), weight = seq(100, 180, 40), sex = c("Male","Female")) ``` ``` height weight sex 1 60 100 Male 2 65 100 Male 3 70 100 Male 4 60 14...
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35,471,942
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7,427
add unit tests for nanops
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2
2014-06-11T10:55:32Z
2014-06-20T14:42:51Z
2014-06-11T12:30:46Z
CONTRIBUTOR
null
This adds unit tests for `pandas.core.nanops`. It also moves existing nanops tests from `test_common` to `test_nanops`.
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https://api.github.com/repos/pandas-dev/pandas/issues/7428
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35,481,845
MDExOlB1bGxSZXF1ZXN0MTY5OTY3OTE=
7,428
make nanops._maybe_null_out work with complex numbers ( issue #7353 )
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3
2014-06-11T13:17:42Z
2014-06-12T11:03:13Z
2014-06-12T10:46:48Z
CONTRIBUTOR
null
This fixes #7353 where `nanops._maybe_null_out`, and thus other functions that call on it, don't work with complex numbers.
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https://api.github.com/repos/pandas-dev/pandas/issues/7429
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35,482,245
MDU6SXNzdWUzNTQ4MjI0NQ==
7,429
BUG: multi-index slicing buggy with datetime selectors
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0
2014-06-11T13:22:41Z
2014-06-11T14:48:35Z
2014-06-11T14:43:24Z
CONTRIBUTOR
null
http://stackoverflow.com/questions/24152509/slicing-a-pandas-multiindex-using-datetime-datatype ``` dates = pd.DatetimeIndex([datetime.datetime(2012,1,1,12,12,12)+datetime.timedelta(days = i) for i in range(6)]) freq = [1,2] iterables = [dates, freq] index = pd.MultiIndex.from_product(iterables, names=['date','freque...
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https://api.github.com/repos/pandas-dev/pandas/issues/7430
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35,486,137
MDExOlB1bGxSZXF1ZXN0MTY5OTkyNDM=
7,430
BUG: Bug in multi-index slicing with datetimelike ranges (strings and Timestamps) (GH7429)
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0
2014-06-11T14:02:04Z
2014-06-12T07:02:34Z
2014-06-11T14:43:24Z
CONTRIBUTOR
null
closes #7429
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https://api.github.com/repos/pandas-dev/pandas/issues/7431
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35,494,089
MDU6SXNzdWUzNTQ5NDA4OQ==
7,431
series created with DatetimeIndex when index is [None]
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3
2014-06-11T15:16:39Z
2014-06-13T15:22:05Z
2014-06-13T15:22:05Z
CONTRIBUTOR
null
This looks like a change from 0.13.1 to HEAD. If you create a series like this: ``` python pd.Series(index=np.array([None])) ``` Then in 0.13.1 the result is: ``` python Out[16]: NaN NaN dtype: float64 In [19]: x.index.dtype Out[19]: dtype('O') In [20]: type(x.index) Out[20]: pandas.core.index.Index ``` but in...
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https://api.github.com/repos/pandas-dev/pandas/issues/7432
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35,494,459
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7,432
Confusing error message on frame.__set_item__ with duplicate index entries
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1
2014-06-11T15:20:09Z
2014-06-13T19:34:50Z
2014-06-13T19:34:50Z
CONTRIBUTOR
null
Struggled with this for a while to work out why I was getting `TypeError: incompatible index of inserted column with frame index` when doing df['new_col'] = my_series. Turns out the the series had duplicates in its index. This occured because I was importing a CSV and then setting the index. Perhaps we need a warning ...
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https://api.github.com/repos/pandas-dev/pandas/issues/7433
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35,506,846
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7,433
SQLAlchemy MySQL df.to_sql() creates 32 bit int MySQL columns for int64 df cols
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3
2014-06-11T17:30:26Z
2014-07-05T13:48:39Z
2014-07-05T13:48:39Z
CONTRIBUTOR
null
Using SQLAlchemy engine for MySQL connection and DataFrame.to_sql(), MySQLdb throws a DataError as a result of 64 bit integer out-of-range as a 32bit integer was created for the table schema. ``` engine = create_engine('mysql://mysql@localhost/db') df = pd.DataFrame(data={'i64':2**62},index=[1]) df.info() <class 'pand...
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https://api.github.com/repos/pandas-dev/pandas/issues/7434
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7,434
ENH: select_dypes impl
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66
2014-06-11T18:22:54Z
2014-07-09T20:53:14Z
2014-07-07T16:22:20Z
MEMBER
null
closes #7316 examples: ``` In [8]: paste df = DataFrame({'a': list('abc'), 'b': list(range(1, 4)), 'c': np.arange(3, 6).astype('u1'), 'd': np.arange(4.0, 7.0), 'e': [True, False, True], 'f': [False, True, False], ...
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API: Improved inference of datetime/timedelta with mixed null objects. (GH7431)
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2
2014-06-11T18:51:00Z
2014-06-13T15:26:37Z
2014-06-13T15:22:05Z
CONTRIBUTOR
null
- regression from 0.13.1 in interpretation of an object Index - additional tests to validate datetimelike inferences closes #7431
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7,436
tm.TestCase.assert_numpy_array_equal(...) and np.nan
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2014-06-11T19:02:19Z
2014-06-12T22:40:07Z
2014-06-11T19:07:24Z
CONTRIBUTOR
null
Is this intended: ``` python # In a testcase: exp = np.array([1,2,4,np.nan]) self.assert_numpy_array_equal(exp, exp) Traceback (most recent call last): File "C:\data\external\pandas\pandas\tests\test_categorical.py", line 490, in test_groupby_categorical_no_compress self.assert_numpy_array_equal(exp, exp) Fil...
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35,574,570
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7,437
make nanops work when ndim==1 and axis==0 ( issue #7354 )
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5
2014-06-12T11:09:11Z
2014-06-12T13:12:55Z
2014-06-12T12:59:15Z
CONTRIBUTOR
null
This fixes issue #7354, where some `nanops` functions fail for 1-dimensional arrays for the argument `axis=0`.
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7,438
Arithmetic by DataFrame index
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2014-06-12T11:12:43Z
2014-06-12T11:15:40Z
2014-06-12T11:15:40Z
NONE
null
I encountered a problem with doing any arythmetic from index, in other words, when a index is time (datetime64) and i would like to count something by it, i have no other option than to assign it to some column in dataframe object. import pandas as pd ``` import pandas as pd rng = pd.date_range('1/1/2011', periods=4,...
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Arithmetic by DataFrame index
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2014-06-12T11:15:17Z
2016-02-24T16:03:45Z
2016-02-24T16:03:15Z
NONE
null
I encountered a problem with doing any arythmetic from index, in other words, when a index is time (datetime64) and i would like to count something by it, i have no other option than to assign it to some column in dataframe object. import pandas as pd ``` import pandas as pd rng = pd.date_range('1/1/2011', periods=4,...
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35,582,648
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7,440
support axis=None for nanmedian ( issue #7352 )
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2014-06-12T13:18:52Z
2014-06-13T13:23:36Z
2014-06-12T22:41:29Z
CONTRIBUTOR
null
This fixes #7352, where `nanmedian` does not work when `axis==None`.
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MDU6SXNzdWUzNTU4NDM5OA==
7,441
[ENH] Allow passing MetaData (or meta kwargs) to high-level SQL functions
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16
2014-06-12T13:40:50Z
2020-06-20T19:41:24Z
null
CONTRIBUTOR
null
Use case: I want to query an Oracle table but I'm not the owner, so `meta.reflect(engine)` would do nothing and always return an empty list of tables rendering `read_sql_table` useless. This works: `meta.reflect(engine, schema='the_real_owner')`, however there's no way of passing the metadata / schema to the high-level...
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7,442
_sanitize_column now reports proper duplicate error
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2014-06-12T16:27:55Z
2014-06-14T10:58:15Z
2014-06-13T19:34:50Z
CONTRIBUTOR
null
closes #7432 A very simple fix for GH7432. `internals.py` (line 3240) actually raises the correct exception (`ValueError: cannot reindex from a duplicate axis`) but the except: doesn't allow it to be raised. Here I've just allowed the exception itself to be raised since it's more useful to the user than the weird `Type...
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7,443
Mouse-over in DataFrame plot shows wrong dates
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2014-06-12T20:01:24Z
2014-06-13T06:39:45Z
2014-06-12T21:04:06Z
NONE
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In a new IPython Notebook session: import pandas as pd import numpy as np %matplotlib dt_rng = pd.date_range(start='2014-01-01', end='2014-01-31', freq='1min') df = pd.DataFrame(np.random.randn(len(dt_rng)), index=dt_rng) ax = df.plot() The DataFrame is plotted correctly. However, a mouse-over shows wrong dates start...
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7,444
WIP/DO NOT MERGE: Categorical improvements
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61
2014-06-12T20:02:16Z
2014-07-14T21:46:02Z
2014-07-14T21:46:02Z
CONTRIBUTOR
null
This is a PR to make discussing the doc changes easier. See https://github.com/pydata/pandas/pull/7217 for the main PR TODO List: now in #7217 ## The Docs (updated 1st july, 4pm CEST) <div class="section" id="categorical"> <span id="id1"></span><h1>Categorical<a class="headerlink" href="#categorical" title="Permalin...
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7,445
Column information lost in to_json() if data frame is empty
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2014-06-12T21:05:10Z
2016-12-16T11:22:01Z
2016-12-16T11:22:01Z
NONE
null
Create empty dataframe with a column and write it out with to_json(), then read it back in: ``` In [55]: s = pandas.DataFrame({'test': [] }, index=[] ).to_json(orient='columns') In [56]: s Out[56]: '{}' In [57]: str( pandas.read_json(s, orient='columns') ) Out[57]: 'Empty DataFrame\nColumns: []\nIndex: []' ``` I thin...
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7,446
Cannot use np.round or np.around on Float64Index
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5
2014-06-12T23:23:46Z
2014-06-19T22:46:15Z
2014-06-19T22:43:18Z
NONE
null
np.round()/np.around() currently don't work on Flaot64Index, because the Float64Index is throwing an error when Float64Index.round() is called. In our application, we are getting floating point digit discrepancies when doing subtraction and other floating point operations on these indicies, and I believe rounding woul...
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7,447
WIP: searchsorted implementation
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46
2014-06-13T03:05:18Z
2014-10-05T01:07:09Z
2014-10-05T01:02:29Z
MEMBER
null
closes #6712 we've decided to simply return `self.values.searchsorted`, since that's what was happening before, and because dealing with non-monotonic indices is a PITA and yields marginal benefit when you can just use `s.iloc[s.searchsorted(...)]` - [x] ~~`timedelta64` tests~~ #8464 - [x] ~~more edge case testing~~ ...
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7,448
Fix bug where ``nanops._has_infs`` doesn't work with many dtypes (issue #7357)
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18
2014-06-13T08:49:59Z
2014-06-22T15:29:59Z
2014-06-13T16:42:59Z
CONTRIBUTOR
null
Fixes issue #7357, where where `nanops._has_infs` doesn't work with many dtypes
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MDU6SXNzdWUzNTY4ODkwNA==
7,449
DateOffset objects should support rollback on arrays
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8
2014-06-13T16:59:28Z
2015-03-06T00:34:30Z
null
MEMBER
null
Use case: I would like to be able to rollback a datetime Series or Index, mapping each value to the first day of each month. I suppose this will probably need Cython to be fast. Example: ``` python import pandas as pd dates = pd.date_range('2000-01-01', periods=100) offset = pd.tseries.offsets.MonthBegin() print ...
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7,450
FIX: Enable fixed width strings to be read from Stata 13 (117) files
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2
2014-06-13T20:23:23Z
2014-06-16T12:52:01Z
2014-06-16T12:51:56Z
CONTRIBUTOR
null
Fixes a bug which prevented files containing fixed width string data from being read. Stata 13 files also allow variable length strings, which are not supported in the current version, and an explicit exception regarding this type is now given. Added tests which cover these cases, and Stata 13 format files. fixes #...
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7,451
TST/CLN: centralize module check funcs
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2
2014-06-13T21:29:07Z
2014-06-21T22:42:21Z
2014-06-21T20:11:43Z
MEMBER
null
- Moved duplicated module check functions to `util.testing` - Remove some unnecessary import
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7,452
ENH/API: offsets funcs now accepts datetime64
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2014-06-13T21:58:09Z
2014-06-14T21:52:32Z
2014-06-14T19:01:04Z
MEMBER
null
Even though `CustomBusinessDay.apply` can handle `np.datetime64`, most of other offsets cannot accept `datetime64` and raises `ApplyTypeError`. The fix allows all offsets `apply`, `rollforward` and `rollback` to handle `np.datetime64` properly. ``` import pandas as pd import numpy as np t = np.datetime64('2011-01-01 0...
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7,453
BUG: Unable to aggregate TimeGrouper
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6
2014-06-14T01:37:22Z
2016-05-19T19:57:17Z
2016-04-10T14:04:45Z
MEMBER
null
Derived from #7373. There seems to be 3 issues related to `TimeGrouper` aggregation. ##### 1. var, std, mean var/std/mean raises `ValueError` when group key contains `NaT`. ``` import pandas as pd import numpy as np data = np.random.randn(20, 4) df = pd.DataFrame(data, columns=['A', 'B', 'C', 'D']) df['dt'] = [date...
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7,454
Add "season" as a time/date component to DatetimeIndex
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2014-06-14T05:10:38Z
2015-03-08T16:54:12Z
null
MEMBER
null
To help pandas to get better traction in the Earth sciences, it would be awesome to add support for climatological "season" as a [Time/Date Component](http://pandas.pydata.org/pandas-docs/stable/timeseries.html#time-date-components) of `pandas.DatetimeIndex`. Season comes up in geoscience at least as often as "quarter"...
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7,455
DOC: Add how to calculate month-start to cookbook
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2014-06-14T05:31:07Z
2014-06-14T23:01:42Z
2014-06-14T13:02:05Z
MEMBER
null
Related: #7449
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7,456
FIX integer column names for older sqlalchemy version GH6340, GH7330
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2014-06-14T10:42:52Z
2014-08-21T07:58:27Z
2014-06-14T11:02:08Z
MEMBER
null
Closes #7330. Should enable to merge #7022 (#6340).
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7,457
BUG: Better axis label handling for partial layout
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4
2014-06-14T11:21:40Z
2014-09-18T20:28:41Z
2014-07-01T15:28:58Z
MEMBER
null
Closes #5897. Handle `ticklabels` and `labels` based on below rules. Currently `labels` are always displayed even if `ticklabels` are hidden and causes confusion. - If `sharex` is `True`, display only most bottom `xticklabels` on each columns. (Because #7035 hides the bottom-right axes). Hide `xlabel` as the same mann...
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7,458
BUG: DTI.intersection doesnt preserve tz
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2014-06-14T12:02:01Z
2014-06-14T15:34:31Z
2014-06-14T14:30:36Z
MEMBER
null
Closes #4690. Also, found and fixed a bug which non-monotonic `Index.union` incorrectly preserves `name` when `Index` have different names. ``` # monotonic idx1 = pd.Index([1, 2, 3, 4, 5], name='idx1') idx2 = pd.Index([4, 5, 6, 7, 8], name='other') idx1.intersection(idx2).name # None (Expected) # non-monotonic idx1 ...
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7,459
BUG/CLN: LinePlot uses incorrect xlim when secondary_y=True
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7
2014-06-14T12:30:28Z
2014-07-09T12:39:10Z
2014-07-07T15:25:12Z
MEMBER
null
`xlim` is not set properly when `secondary_y=True`. This is different issue from #7322. Also, refactored `secondary_y` to be handled only by `MPLPlot`, because it will be required in future fix to pass multiple axes to `df.plot`, like #7069 (I'm willing to work soon..). ``` df = pd.DataFrame(np.random.randn(5, 5), co...
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7,460
New index created by 2 weeks resampling is 1 week off
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5
2014-06-14T13:40:04Z
2014-06-14T14:15:48Z
2014-06-14T14:15:48Z
NONE
null
``` python pd.Series( index=pd.date_range('2014-06-01', periods=20 ), data=range(20) ).resample( '2W-SAT', how='sum' ) Out[23]: 2014-06-07 21 2014-06-21 169 Freq: 2W-SAT, dtype: int64 ``` The first entry of a 2 weeks resampling corresponds to the first week of the data. The expected output should rather be ``...
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7,461
nanops pep8 fixes
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1
2014-06-14T14:23:51Z
2014-06-26T10:29:12Z
2014-06-17T12:36:03Z
CONTRIBUTOR
null
Very minor pep8 fixes for `nanops`. This brings `nanops` into pep8 compliance.
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7,462
BUG: unstack fails for mixed dtype subset
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14
2014-06-14T19:09:58Z
2015-04-08T14:49:18Z
2015-04-08T14:49:18Z
MEMBER
null
closes #7405
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PERF: performance gains in DataFrame groupby.transform for ufuncs (GH7383)
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0
2014-06-14T20:12:21Z
2014-06-16T12:52:18Z
2014-06-16T12:52:18Z
CONTRIBUTOR
null
accelerates non-modifying transformations, e.g. closes #7383 `DataFrame.groupby(...).transform(np.max)` ``` ------------------------------------------------------------------------------- Test name | head[ms] | base[ms] | ratio | -------------------------------------------------...
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BUG: astype(float) in Index does the wrong thing
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2014-06-14T20:15:22Z
2014-06-15T01:33:36Z
2014-06-15T01:33:35Z
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MDExOlB1bGxSZXF1ZXN0MTcxNDczNjk=
7,465
BUG: Some offsets.apply cannot handle tz properly
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1
2014-06-14T21:42:43Z
2014-06-17T14:38:59Z
2014-06-17T11:57:36Z
MEMBER
null
There are some offsets which cannot handle input with `tz` properly ``` pd.offsets.Day().apply(pd.Timestamp('2010-01-01 9:00', tz='US/Eastern')) #2010-01-02 09:00:00-05:00 (Expected) pd.offsets.CustomBusinessDay().apply(pd.Timestamp('2010-01-01 9:00', tz='US/Eastern')) #2010-01-04 09:00:00 (tzinfo lost) pd.offsets.C...
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35,738,423
MDU6SXNzdWUzNTczODQyMw==
7,466
BUG: pivot with nans gives a seemingly wrong result
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4
2014-06-14T22:55:00Z
2014-12-22T13:08:53Z
2014-12-22T13:08:53Z
MEMBER
null
related to #3588 This test ``` python def test_pivot_index_with_nan(self): # GH 3588 nan = np.nan df = DataFrame({"a":['R1', 'R2', nan, 'R4'], 'b':["C1", "C2", "C3" , "C4"], "c":[10, 15, nan , 20]}) result = df.pivot('a','b','c') expected = DataFrame([[nan,nan,nan,nan],[nan,10,nan,nan], ...
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MDExOlB1bGxSZXF1ZXN0MTcxNTQ1MzI=
7,467
DOC: Add missing column header in 'baseball.csv'.
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1
2014-06-15T17:42:00Z
2014-06-15T18:10:30Z
2014-06-15T18:10:23Z
CONTRIBUTOR
null
Add missing column header in 'baseball.csv' in the docs.
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7,468
ENH: Cast ndarray-like datetime64 arrays to Index properly
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1
2014-06-15T22:56:55Z
2014-06-16T16:51:53Z
2014-06-16T12:50:48Z
MEMBER
null
It turns out that the ndarray-like arrays of dtype `datetime64` were not being properly cast to an `Index`, because -- due to a bug with `np.datetime64` -- calling `np.asarray(x, dtype=object)` if x is an ndarray of type `datetime64` results in an _integer_ array. This PR adds tests and a work around to `pd.Index.__ne...
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35,761,816
MDU6SXNzdWUzNTc2MTgxNg==
7,469
Panel.apply fails when one of the axes is a Multi-Indexed DataFrame
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4
2014-06-16T00:33:42Z
2014-06-16T14:45:19Z
2014-06-16T14:20:06Z
NONE
null
Wrote up an example notebook: http://nbviewer.ipython.org/urls/gist.githubusercontent.com/colindickson/850d3b5172f0320f204a/raw/62e4dfd450964326b8e3c2635c5c3f4c098a7352/panel.ipynb
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MDExOlB1bGxSZXF1ZXN0MTcxNTk5MzI=
7,470
ENH: ignoring comment lines and empty lines in CSV files
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91
2014-06-16T03:26:23Z
2014-12-29T21:35:48Z
2014-09-19T17:55:47Z
CONTRIBUTOR
null
closes #4466
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35,770,444
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7,471
kind='area' plot not showing
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6
2014-06-16T06:20:12Z
2014-07-08T14:16:27Z
2014-07-05T01:31:30Z
NONE
null
Maybe it is a bug, but following problem: In the new Pandas 0.14 you guys implemented an awesome kind='area' option for plot. If I plot a dataframe normally, like `df.plot()` ![](http://i.stack.imgur.com/4voj8.png) but when I take the option `df.plot(kind='area')`, I just get ``` Out[69]: <matplotlib.axes.AxesSubp...
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7,472
DOC: cython example producing numpy deprecation warning
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3
2014-06-16T10:48:34Z
2015-10-20T22:42:26Z
2015-10-20T22:42:26Z
MEMBER
null
Didn't test it out myself, but it appears already for a while in the doc building on Travis. Is this due to our implemenation of the example? Or something with the cython version? @hayd I think you added this example? ``` reading sources... [ 30%] enhancingperf In file included from /home/travis/virtualenv/python2.7...
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35,791,663
MDU6SXNzdWUzNTc5MTY2Mw==
7,473
two dataframes outer join on null values
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2014-06-16T12:30:58Z
2021-07-21T04:37:41Z
2021-07-21T04:37:41Z
NONE
null
In pandas, unlike SQL, the rows seemed to be joining on null values. Is this a bug? related SO: http://stackoverflow.com/questions/23940181/pandas-merging-with-missing-values/23940686#23940686 Code snippet ``` python import pandas as pd import numpy as np df1 = pd.DataFrame( [[1, None], [2, 'y']], colum...
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7,474
BUG: Bug in Panel.apply with a multi-index as an axis (GH7469)
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0
2014-06-16T13:26:53Z
2014-06-16T14:20:06Z
2014-06-16T14:20:06Z
CONTRIBUTOR
null
closes #7469
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35,809,283
MDU6SXNzdWUzNTgwOTI4Mw==
7,475
ENH/BUG: support multi-index slicing assignment expansions
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0
2014-06-16T15:50:33Z
2021-04-11T04:48:45Z
null
CONTRIBUTOR
null
From SO: http://stackoverflow.com/questions/24247255/idiomatic-multiindex-column-assignment-in-pandas/24247513#24247513 http://stackoverflow.com/questions/24258781/advanced-cross-section-with-multi-index-in-pandas ``` ix = pd.MultiIndex.from_tuples(list(enumerate(np.random.choice(['A', 'B'], 5)))) df = pd.DataFrame({...
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7,476
BUG: Bug Multiindex assignment with an aligned rhs (but at different levels) (GH7475)
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2
2014-06-16T17:29:55Z
2014-08-05T21:50:04Z
2014-08-05T15:43:12Z
CONTRIBUTOR
null
closes #7475
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35,822,945
MDU6SXNzdWUzNTgyMjk0NQ==
7,477
IO: memory_map kw in read_csv
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2014-06-16T18:27:51Z
2016-06-08T11:25:44Z
2016-06-08T11:25:44Z
CONTRIBUTOR
null
not sure of the purpose of `memory_map` (e.g. whether its needed anymore or not). might be an older option. If it IS current, then needs to be documented.
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7,478
Fix cache key collision and add test for cache key distinctness.
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5
2014-06-16T20:04:54Z
2014-06-17T09:56:00Z
2014-06-17T00:18:00Z
CONTRIBUTOR
null
Fixes #7420.
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7,479
BUG: Make copies of certain interpolate arguments (GH7295)
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4
2014-06-17T01:32:57Z
2014-06-17T11:23:03Z
2014-06-17T11:22:59Z
CONTRIBUTOR
null
closes #7295 On the alt_methods branch in interpolate_1d, make copies if x, y, and new_x don't have their `writeable` attribute set. It seems a little weird that we need to do this, but it'll work around the issue so that the test can pass, anyway.
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35,852,479
MDU6SXNzdWUzNTg1MjQ3OQ==
7,480
Conditional Join (merge) in pandas
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2
2014-06-17T02:03:46Z
2021-04-11T05:52:53Z
2021-04-11T05:52:52Z
NONE
null
I wonder if it possible to implement conditional join (merge) between pandas dataframes. Basically, I am thinking some conditional SQL-like joins: ``` select a.id, a.date, a.var1, a.var2, b.var3 from data1 as a left join data2 as b on (a.id<b.key+2 and a.id>b.key-3) and (a.date>b.date-10 and a.d...
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7,481
BUG/WIP: fix pivot with nan indexes
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6
2014-06-17T02:13:49Z
2015-01-25T23:30:05Z
2015-01-25T23:30:05Z
MEMBER
null
closes #7466 - [ ] vbench - [ ] make sure there isn't a better way to do this
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7,482
warning issued for new version of openpyxl (2.0.3)
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2
2014-06-17T04:39:59Z
2014-06-17T08:21:15Z
2014-06-17T08:21:15Z
NONE
null
"import pandas" issues the following warning C:\Users\aaa\AppData\Local\Enthought\Canopy32\User\lib\site-packages\pandas\io\excel.py:626: UserWarning: Installed openpyxl is not supported at this time. Use >=1.6.1 and <2.0.0. .format(openpyxl_compat.start_ver, openpyxl_compat.stop_ver))
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7,483
DOC: fix docstring of value_counts/nunique dropna argument after GH7424
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2014-06-17T13:38:20Z
2014-07-07T19:11:41Z
2014-07-07T19:11:41Z
MEMBER
null
See #7424, fix docstring.
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7,484
DOC: Clean up docs for io.data.Options.
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2014-06-17T16:04:01Z
2014-06-18T09:35:51Z
2014-06-17T18:52:02Z
CONTRIBUTOR
null
Per conversation on #5602, adjusted some of the docs. Removed from release.rst, changed example strike price for AAPL, fixed backticks.
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ENH/BUG: Period/PeriodIndex supports NaT
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2014-06-17T16:04:40Z
2014-06-20T14:45:55Z
2014-06-19T19:27:10Z
MEMBER
null
Closes #7228. Closes #4731. `Period` and `PeriodIndex` now can contain `NaT` using `iNaT` as its internal value.
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Packaging: `pip install pandas` pulls in numpy 1.8.1, but isn't linked against that version
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2014-06-17T17:52:31Z
2014-06-17T22:58:25Z
2014-06-17T18:15:41Z
NONE
null
`import pandas` fails with `ValueError: numpy.dtype has the wrong size, try recompiling`, which I would guess is due to the above.
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7,487
Switch if to elif, effectively repairing the unicode r_dtype branch
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2014-06-18T00:27:42Z
2014-06-18T00:31:41Z
2014-06-18T00:31:41Z
CONTRIBUTOR
null
in test_to_csv_moar._do_test.
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Switch if to elif in test_frame.test_to_csv_moar._do_test
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2014-06-18T00:31:58Z
2014-06-18T12:19:29Z
2014-06-18T12:19:26Z
CONTRIBUTOR
null
An if-elif-else chain had an "if" where there should have been an elif.
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[doc fix] minor docstring update to fix df.to_latex() usepackage syntax
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2014-06-18T01:40:13Z
2014-06-18T06:49:43Z
2014-06-18T06:49:39Z
NONE
null
Minor docstring fix for option `DF.to_latex()` for `\\usepackage{booktabs}`
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7,490
API: support multiple indexers for .iloc with a MultiIndex
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2014-06-18T05:46:47Z
2014-06-23T09:40:30Z
2014-06-23T09:40:30Z
MEMBER
null
MultIndexing with multiple indexers (#6301) via `.loc` is great. It would be nice to mirror this functionality with `.iloc`. To my understanding, until this change, `loc` and `iloc` had a mirror syntax, where if you replaced all of your index labels with arrays of 0-indexed integers, they were equivalent, e.g., for t...
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7,491
DOC: latex symbols/equations not rendering in stable docs
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2014-06-18T07:49:27Z
2014-07-06T12:16:12Z
2014-07-06T12:16:12Z
MEMBER
null
Seems somehing went wrong when I built the docs for the 0.14 version, eg http://pandas.pydata.org/pandas-docs/stable/computation.html#exponentially-weighted-moment-functions. Have to look into it, reporting it here as an issue to not forget it for 0.14.1
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7,492
Assigning datetime array to column fails with OutOfBoundsDatetime when having NaT and other unit as [ns]
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2014-06-18T08:35:24Z
2016-12-17T23:13:43Z
2016-12-17T23:13:43Z
MEMBER
null
Assigning an array with datetime64[ns] values including a NaT just works: ``` In [85]: a = np.array([1, 'nat'], dtype='datetime64[ns]') In [86]: pd.Series(a) Out[86]: 0 1970-01-01 00:00:00.000000001 1 NaT dtype: datetime64[ns] In [88]: df = pd.Series(a).to_frame() In [89]: df['new'] =...
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Performance degradation in pandas 0.13/0.14
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2014-06-18T10:40:22Z
2015-09-20T20:41:21Z
2015-09-20T20:41:21Z
NONE
null
I reported previously on issue #7208. It was noted that .ix was slower as of pandas 0.13 but that this should be only noticeable in non-vectorized code. I sometimes however have trouble vectorizing everything. Please consider the following code in which I have a rather big correlation matrix, using multi-indexed column...
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35,979,717
MDU6SXNzdWUzNTk3OTcxNw==
7,494
Series.shift and DataFrame.shift do not preserve dtype
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3
2014-06-18T12:32:22Z
2014-07-07T15:44:35Z
2014-07-07T15:44:35Z
NONE
null
shift() method converts int32 to float64, and you need an extra step to convert it back ``` py s = Series(range(100), dtype=np.int32) print s.dtype, s.shift(1).dtype ``` Version 0.14 The documentation says otherwise: Returns : shifted : same type as caller
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35,992,040
MDExOlB1bGxSZXF1ZXN0MTcyOTcxNzc=
7,495
DOC: Fix index error for remote data docs.
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4
2014-06-18T14:40:36Z
2014-06-18T16:23:14Z
2014-06-18T16:23:09Z
CONTRIBUTOR
null
Fixes the index error caused by #7484. Also removes duplicate example in v0.14.1.txt
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35,994,959
MDU6SXNzdWUzNTk5NDk1OQ==
7,496
BUG: strange behavior of .loc indexer: falling back to integer-based indexing with list
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3
2014-06-18T15:08:06Z
2014-06-19T09:53:10Z
2014-06-19T09:53:10Z
NONE
null
``` Python 2.7.6 (default, Mar 22 2014, 22:59:56) [GCC 4.8.2] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import pandas >>> a = pandas.Series() >>> a.loc[1] = 1 >>> a.loc['a'] = 2 >>> a.loc[[-1, -2]] 1 1 a 2 dtype: int64 ``` This is ok: ``` >>> a.loc[-1] Traceback (most...
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7,497
BUG: Bug in .loc performing fallback integer indexing with object dtype indices (GH7496)
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3
2014-06-18T15:29:24Z
2014-06-19T09:53:10Z
2014-06-19T09:53:10Z
CONTRIBUTOR
null
closes #7496 ``` In [4]: s = Series() In [5]: s.loc[1] = 1 In [6]: s.loc['a'] = 2 In [7]: s.loc[-1] KeyError: 'the label [-1] is not in the [index]' In [8]: s.loc[[-1, -2]] Out[8]: -1 NaN -2 NaN dtype: float64 In [9]: s.loc[['4']] Out[9]: 4 NaN dtype: float64 In [10]: s.loc[-1] = 3 In [11]: s.loc[[-1,...
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35,999,914
MDU6SXNzdWUzNTk5OTkxNA==
7,498
Bar plots are misaligned by default
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3
2014-06-18T15:55:24Z
2014-07-01T15:29:53Z
2014-07-01T15:29:53Z
NONE
null
There has been a recent change in bar plot default behavior that is causing misalignment of the bars on the y-axis. I'm not sure when this change occurred, but I will estimate 3-4 months ago. Previously, bar plots looked like this: ![good bar plot](http://d.pr/i/c2mO+) However, the same code under '0.14.0-205-gbbde...
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7,499
Deprecate detection of IPython frontends
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7
2014-06-18T18:58:40Z
2014-06-24T22:01:53Z
2014-06-24T22:01:49Z
CONTRIBUTOR
null
The check for the Qt console won't be necessary in IPython 3 and above: we decided that the Qt console's display of HTML reprs was so bad that it shouldn't attempt to show them. We also want to remove the `parent_appname` config value (ipython/ipython#4980), which will break both of these functions (making them always ...
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7,500
Possible Bug - math on like-indexed datetime series doesn't work as expected
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3
2014-06-18T19:15:25Z
2014-06-19T00:01:48Z
2014-06-19T00:01:34Z
NONE
null
![firstordernoteval](https://cloud.githubusercontent.com/assets/4734283/3319074/b707a340-f71c-11e3-942f-c06129ab246f.jpg) ![firstevalorder](https://cloud.githubusercontent.com/assets/4734283/3319075/bb0908d0-f71c-11e3-828f-2dd601125732.jpg) I have two series that are like-indexed datetimes. I'm trying to do simple mat...
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