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https://api.github.com/repos/pandas-dev/pandas/issues/3001
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MDU6SXNzdWUxMTg0OTkxOA==
3,001
[io] comment option ignored in read_csv when sep provided.
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2013-03-10T08:47:39Z
2013-08-21T20:52:12Z
2013-08-21T20:52:12Z
CONTRIBUTOR
null
``` python In [8]: import pandas as pd In [9]: from StringIO import StringIO In [10]: s = """# date, utc, jdate, orbit, sundist, sunlat, sunlon, sclk, sclat, sclon, scrad, scalt, el_cmd, az_cmd, af, orientlat, orientlon, c, det, vlookx, vlooky...
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11,855,114
MDU6SXNzdWUxMTg1NTExNA==
3,002
Weird Datetime Behaviour
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2013-03-10T17:41:32Z
2013-03-14T14:03:09Z
2013-03-14T14:03:09Z
NONE
null
I am seeing odd behavior of dates being converted to `datetime64[ns]` times when that is inappropriate. ``` In [272]: file = StringIO("xxyyzz20100101PIE\nxxyyzz20100101GUM\nxxyyww20090101EGG\nfoofoo20080909PIE") In [273]: df = pd.read_fwf(file, widths=[6,8,3], names=["person_id", "dt", "food"], parse_dates=["...
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11,855,678
MDExOlB1bGxSZXF1ZXN0NDUzNjM1Mg==
3,003
BUG: fixed value_counts with datetime64[ns], GH 3002
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0
2013-03-10T18:30:29Z
2014-06-16T11:59:45Z
2013-03-10T23:48:18Z
CONTRIBUTOR
null
Fixes issue #3002 - Fixed for datetime64[ns] - Fixed for timedelta64[ns](though the returned index is actually int64, which is wrong, should make a TimeDeltaIndex class....someday) - Fixed NaT display in a DateTimeIndex (was displaying funny) ``` 0 2010-01-01 00:00:00 1 2010-01-01 00:00:00 2 2009-01-01 00:00:0...
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MDU6SXNzdWUxMTg1NjEyOQ==
3,004
closest_time addition to DatetimeIndex
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4
2013-03-10T19:08:24Z
2014-11-18T11:18:23Z
2014-11-18T11:18:23Z
CONTRIBUTOR
null
What do people think of adding a `closest_time` method to the DatetimeIndex, which will behave a bit like `asof` but will return the row of the DataFrame (or element of the Series) which is closest to the given time. I have written code to do this manually (and discussed some Pandas bugs I found while doing this in #2...
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11,856,356
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3,005
df.from_records should accept values deriving from ABC collections.Mapping #3000
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2013-03-10T19:25:31Z
2013-03-15T20:43:54Z
2013-03-15T20:43:47Z
NONE
null
#3000
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3,006
0.11.0.dev-2a6ee46: MultiIndex column slicing doesn't work with tuples
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3
2013-03-10T23:42:17Z
2013-03-11T00:20:36Z
2013-03-11T00:20:36Z
NONE
null
``` import numpy as np from pandas import MultiIndex, DataFrame factors = [('a', 'b'), 'c'] names = ['n1', 'n2'] n_factors = len(factors) n_names = len(names) columns = MultiIndex(levels=[factors, names], labels=[[i for i in xrange(n_factors) for _ in xrange(n_names)], range(n_names) * n_factors]) x = DataFrame(np...
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11,860,167
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3,007
ENH: handle float32/int32 in various algos
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2013-03-11T00:19:27Z
2019-01-01T17:29:08Z
2019-01-01T17:29:07Z
CONTRIBUTOR
null
rank 1d/2d hash table (for value counts) lots of rolling algos use fused types!
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3,008
Use Cython's parallelization capabilities
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2013-03-11T00:24:25Z
2013-07-22T20:00:48Z
2013-07-22T20:00:48Z
NONE
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1. Cython supports parallelization using openMP. 2. ... 3. World Domination! Perhaps a good candidate for a future GSoC.
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11,861,432
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3,009
ENH: TimeDeltaIndex and corresponding scalar
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2013-03-11T02:00:02Z
2014-09-13T23:00:04Z
2014-09-13T22:59:30Z
CONTRIBUTOR
null
- [x] disallow operations in series that are invalid that now create timedelta64 (e.g. dt + dt, only dt - dt?) #4534 - [x] create the TimeDeltaIndex object, inherit from Int64, #8184 - [x] create associated scalar (np.timedelta64 wrapper), like Timestamp (Timedelta?), direct wrapper might work, #8184 that forward...
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3,010
DataFrame corrupted after improper column creation
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2013-03-11T07:58:44Z
2013-03-13T03:23:33Z
2013-03-13T03:23:33Z
NONE
null
I want to add a column to DataFrame using a list of arrays, but I forgot to change the 2d array into list first, so I got a "Wrong number of items passed" error. After that, the df seemed to be corrupted, whenever I want to print it, it kept raising a "NoneType object is not iterable error". While it could still be a...
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11,873,378
MDU6SXNzdWUxMTg3MzM3OA==
3,011
segmentation fault on groupby
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3
2013-03-11T11:44:35Z
2013-03-16T23:53:25Z
2013-03-16T23:53:25Z
NONE
null
``` import numpy as np import pandas as pd series = pd.Series([np.nan, np.nan, 1, 1, 2, 2, 3, 3, 4, 4]) bins = pd.cut(series.dropna(), 4) # this works series.dropna().groupby(bins).mean() # but this results in: # [1] 42448 segmentation fault python series.groupby(bins).mean() ``` So, I can see why trying to group...
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11,877,070
MDU6SXNzdWUxMTg3NzA3MA==
3,012
Can not put a dataframe into hdfstore *completely*
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3
2013-03-11T13:43:30Z
2013-03-14T03:24:02Z
2013-03-14T03:24:02Z
NONE
null
- I load a dataframe from mysql: ``` python df_bugs_activity_4w = psql.read_frame('select * from bugs_activity limit 0, 40000', conn) ``` - and the structure of df_bugs_activity_4w: ``` python In[19]: df_bugs_activity_4w Out[19]: <class 'pandas.core.frame.DataFrame'> Int64Index: 40000 entries, 0 to 39999 Data column...
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11,881,678
MDExOlB1bGxSZXF1ZXN0NDU0NzgzMQ==
3,013
BUG: pytables not writing rows where all-nan in a part of a block
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2013-03-11T15:26:47Z
2014-06-25T01:05:21Z
2013-03-11T18:20:16Z
CONTRIBUTOR
null
fixes #3012 if the first column of a block was all-nan was not writing that row
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11,890,487
MDExOlB1bGxSZXF1ZXN0NDU1MjM3OQ==
3,014
Bug: Fixed Issue 2993, Incorrect Timestamp Construction by datetime.date and tz
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4
2013-03-11T18:25:42Z
2014-07-01T11:00:16Z
2013-03-21T07:38:36Z
CONTRIBUTOR
null
`Timestamp` cannot be constructed correctly by given an `datetime.date` instance and `tz`. The issued has been solved in this patch and the test case is add in `pandas/tseries/test/test_timezones.py`
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11,907,771
MDExOlB1bGxSZXF1ZXN0NDU2MTA4Nw==
3,015
DOC: ylabels for secondary_y axis
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3
2013-03-12T02:49:36Z
2013-08-26T20:18:07Z
2013-03-16T00:39:22Z
CONTRIBUTOR
null
modified "Selective Plotting on Secondary Y-axis" example to show how to set ylabels for both left and right y axis
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11,909,589
MDU6SXNzdWUxMTkwOTU4OQ==
3,016
Issues updating the DateFrame from another DataFrame
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1
2013-03-12T04:27:47Z
2013-03-16T04:47:56Z
2013-03-16T04:47:56Z
CONTRIBUTOR
null
http://stackoverflow.com/questions/15349795/pandas-dataframe-combine-first-and-update-methods-have-strange-behavior/15353297#15353297
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11,910,128
MDExOlB1bGxSZXF1ZXN0NDU2MjA0Mw==
3,017
segmentation fault on groupby with categorical grouper of mismatched len
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2013-03-12T04:51:18Z
2014-07-19T13:06:32Z
2013-03-16T23:52:23Z
NONE
null
closes #3011
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11,922,544
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3,018
BUG: Bug in DataFrame column insertion when the column creation fails (GH3010)
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2013-03-12T12:47:40Z
2014-06-14T07:24:11Z
2013-03-12T16:14:07Z
CONTRIBUTOR
null
Bug in DataFrame column insertion when the column creation fails existing frame is left in an irrecoverable state, fixes #3010
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11,923,372
MDU6SXNzdWUxMTkyMzM3Mg==
3,019
shift doesn't maintain timestamp datatype
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1
2013-03-12T13:12:42Z
2013-03-14T10:43:08Z
2013-03-14T10:43:08Z
NONE
null
So far so good... pd.Series(pd.date_range("2000-1-1","2000-1-10")) 0 2000-01-01 00:00:00 1 2000-01-02 00:00:00 2 2000-01-03 00:00:00 3 2000-01-04 00:00:00 4 2000-01-05 00:00:00 5 2000-01-06 00:00:00 6 2000-01-07 00:00:00 7 2000-01-08 00:00:00 8 2000-01-09 00:00:00 9 2000-01-10 00:00:00 pd.Series(pd...
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11,924,688
MDU6SXNzdWUxMTkyNDY4OA==
3,020
resample up skips first day
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1
2013-03-12T13:46:53Z
2014-03-29T00:53:55Z
2013-03-18T17:25:38Z
NONE
null
When resampling from a TimeSeries with freq='MS' to freq='D' the TimeSeries is shifted forward by one day, skipping the first element: ``` python In [64]: dates = pd.date_range('01-Apr-13','01-May-13',freq='MS') In [65]: ts = pd.TimeSeries([1,2],dates) In [66]: ts Out[66]: 2013-04-01 1 2013-05-01 2 Freq: MS ...
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3,021
BUG: Bug in DataFrame update where non-specified values could cause dtype changes
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2013-03-12T14:28:16Z
2014-06-12T23:49:54Z
2013-03-12T22:38:01Z
CONTRIBUTOR
null
fixes #3016
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3,022
BUG: `concat` gives incorrect results for series with the same name
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2013-03-12T15:02:43Z
2013-03-12T15:20:22Z
2013-03-12T15:20:18Z
CONTRIBUTOR
null
As shown in the example below, when passing in two series with the same name to `concat` you end up with duplicates of the last series passed in. ``` python In [42]: pd.__version__ Out[42]: '0.10.1' In [43]: dates = pd.date_range('01-Jan-2013','01-Dec-2013', freq='MS') ...: L = pd.TimeSeries('L', dates, name='Le...
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3,023
Continuing #2057, s/assert/raise AssertionError/g
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2013-03-12T15:25:14Z
2014-06-17T07:37:07Z
2013-04-23T02:10:48Z
NONE
null
#2057 Though I've never encountered usage of python -O in the wild.
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3,024
TODO: Decorate asserts with helpful messages
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2013-03-12T15:28:41Z
2014-01-10T12:36:44Z
2014-01-10T12:36:44Z
NONE
null
See changes made in #3023, #2057. Enhancing an assert with a meaningful message is an easy way to make your first contribution to the pandas project.
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3,025
CLN: move update to BlockManager method (and just call from frame)
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2013-03-12T15:32:24Z
2019-02-22T19:02:58Z
null
CONTRIBUTOR
null
promotes consistency, see #3021, #3016, #9065
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Add viewcode extension to allow for links to source in API docs
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2013-03-12T16:31:00Z
2014-01-18T03:44:29Z
2014-01-18T03:44:29Z
CONTRIBUTOR
null
This creates the [source] links in the API documentation sections. You can read more about this Sphinx extension [here](http://sphinx-doc.org/ext/viewcode.html). There could be a reason this is NOT already added so let me know. I find it useful to have this because often times I want to easily jump to the source in ...
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3,027
BUG: Bug in user-facing take with negative indicies was incorrect
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2013-03-12T18:20:24Z
2014-06-26T05:58:14Z
2013-03-12T23:17:20Z
CONTRIBUTOR
null
issue mentioned in #2892 note: does not solve the actual segmentation faults issue in 2892, only user facing take with neg indicies
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3,028
Fortify cython functions against segfaults (without killing perf)
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2013-03-12T18:45:28Z
2013-04-27T20:27:44Z
2013-04-27T20:23:34Z
NONE
null
Following discussion in #2892, and segfaults in #3011, #2775, #2778 and others. manually insert needed checks before inner loop, leaving @cython.boundscheck(False) inplace.
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3,029
ENH: safety bounds checks for take funcs
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2013-03-12T19:14:26Z
2014-06-12T13:27:50Z
2013-07-29T05:14:12Z
CONTRIBUTOR
null
as per #3028; haven't done vb_suite yet but presumably we're ok paying the price for safety; will run to see what the hit is though
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BUG: inconsistent behavior of set_value
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2013-03-12T19:24:05Z
2013-03-12T19:53:29Z
2013-03-12T19:31:17Z
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when using set_value to update a DataFrame, the update is done inplace if the given label exist in the index, but a new DataFrame is created if the label is not in the index. For instance: The following will not update the original DataFrame ``` In [99]: a = pd.DataFrame(rand(5,5), columns=['a','b','c','d','e']) In ...
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4
2013-03-12T20:09:24Z
2014-06-26T01:13:26Z
2013-03-17T15:32:36Z
NONE
null
continues #3017, does an easier bit under #3028
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3,032
HDFStore appending for mixed datatypes, including NumPy arrays
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2013-03-12T21:38:22Z
2013-03-20T15:21:32Z
2013-03-20T15:21:32Z
NONE
null
A pandas array I have contains some image data, recorded from a camera during a behavioral experiment. A simplified version looks like this: ``` num_frames = 100 mouse = [{"velocity":np.random.random((1,))[0], \ "image":np.random.random((80,80)).astype('float32'), \ "spine":np.r_[0:80].astype('float32'...
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3,033
TODO: convert from `ndarray.take` to internal takes, remove platform int <-> int64 conversions?
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2013-03-13T00:13:41Z
2016-08-17T10:21:25Z
2016-08-17T10:21:25Z
CONTRIBUTOR
null
just throwing this out there, spliting off from discussion at #2892... right now index arrays are constantly being converted back and forth between platform int and int64 on 32-bit platforms, since `ndarray.take` requires the former but the cython routines use the latter this can probably be removed if all `ndarray.ta...
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3,034
BUG: Formatting of an index that has nan was inconsistent or wrong
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2013-03-13T01:17:49Z
2014-08-13T08:36:17Z
2013-03-13T16:37:44Z
CONTRIBUTOR
null
Formatting of an index that has `nan` was inconsistent or wrong, (would fill from last value), closes GH #2850 Also changed in test_format.py/test_index 1) printing of 'nan' rather than the na_rep (NaN) is inconcsistent with everywhere else 2) a 'None' in the index is defacto treated as NaN, is this wrong?
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3,035
BUG: groupby segfaults when passed a function of a timestamp which raises a TypeError
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2013-03-13T10:43:07Z
2013-03-17T15:33:15Z
2013-03-17T15:33:15Z
CONTRIBUTOR
null
It _is_ a dumb thing to do, but pandas probably shouldn't segfault regardless: ``` python In [1]: dates = pd.date_range('01-Jan-2013', periods=12, freq='MS') ...: ts = pd.TimeSeries(randn(12), index=dates) In [2]: ts.groupby(lambda key: key[0:4]).first() It seems the kernel died unexpectedly. Use 'Restart kernel' ...
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3,036
DOC: added cookbook.rst to main docs
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2013-03-13T11:46:14Z
2014-06-26T19:46:41Z
2013-03-13T16:38:44Z
CONTRIBUTOR
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11,987,146
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3,037
ENH: should we relax frame/setitem for non-numerics
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2013-03-13T18:29:49Z
2013-03-14T11:38:44Z
2013-03-14T11:38:44Z
CONTRIBUTOR
null
I came across the case where if you try setitem with a boolean mask on a frame that is mixed dtype an exception is raised this is easily relaxed in the int/float case (and will leave/upcast the int columns as needed) ``` In [68]: df Out[68]: 0 1 2 3 4 y 35 NaN NaN NaN NaN ...
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3,038
Fix some pprint_thing warts
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2013-03-13T19:26:34Z
2014-06-19T09:13:11Z
2013-04-23T02:11:03Z
NONE
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**Part 1** currently: ``` python In [4]: from pandas.core.common import pprint_thing as pp_t ...: pp_t([1,None]) Out[4]: u'[1, ]' ``` after PR: ``` python In [13]: from pandas.core.common import pprint_thing as pp_t ...: pp_t([1,None]) Out[13]: u'[1, None]' ``` and jeff fixed index NaN printing in #3034, at ...
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3,039
ENH: Change resample to default to returning GroupBy instead of mean when how=None
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2013-03-13T20:14:34Z
2013-04-17T19:26:55Z
2013-04-17T19:25:56Z
CONTRIBUTOR
null
Wanted to get opinions on this. It would be nice to formally expose a GroupBy object that uses BinGrouper. This would be useful for those of us who monkey patch the GroupBy object for convenience. Do people use the default behavior outside of quick demo-ing purposes?
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BUG: Unstack of a frame with no nans would always cause dtype upcasting (GH #2929)
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2013-03-13T22:04:45Z
2014-07-26T15:38:19Z
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CONTRIBUTOR
null
fixes #2929
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3,041
BUG: combine_first changing dtypes of untouched columns
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2013-03-13T22:55:58Z
2014-06-19T15:13:37Z
2013-03-14T02:01:35Z
CONTRIBUTOR
null
fixed for update in PR #3021 groupby and first/last too www.stackoverflow.com/questions/15349795/pandas-dataframe-combine-first-and-update-methods-have-strange-behavior
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3,042
Timestamp.fromordinal Exception AttributeError
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4
2013-03-13T23:39:00Z
2017-07-25T16:19:20Z
2013-03-22T17:37:10Z
CONTRIBUTOR
null
I have a datetime.datetime, convert it to ordinal and try to read it back with pd.Timestamp.fromordinal(). This produces the following error: ``` python In [112]: dt Out[112]: datetime.datetime(2011, 4, 16, 0, 0) In [113]: pd.Timestamp.fromordinal(dt.toordinal()) Exception AttributeError: "'int' object has no attribu...
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BUG: frame combine_first where non-specified values could cause dtype changes (#3041)
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2013-03-14T00:36:19Z
2014-06-17T22:38:49Z
2013-03-14T01:18:49Z
CONTRIBUTOR
null
fixes combine_first on #3041
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3,044
BUG: Bug in groupby with first/last where dtypes could change (GH3041_)
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2013-03-14T01:24:53Z
2014-08-16T18:47:32Z
2013-03-14T02:00:20Z
CONTRIBUTOR
null
fixed #3041 (completed now) DOC: docstring updates in core/common.py for _possibily_cast_to_timedelta
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12,003,055
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3,045
Access row/col data via attributes
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6
2013-03-14T02:08:35Z
2014-06-24T00:19:54Z
2013-03-15T09:36:48Z
NONE
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- Supercedes #1904 - Namespaces rows/cols as `df.r.<row label>`, `df.c.<col label>` - get/set, multindex in both axes - Designates df.<colname> (75310383) for future removal. - No perf hit on attribute lookup, if you don't use it (raised in #1904). Open issues: - .r and .c (which i like), don't generalize to dim>2. U...
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3,046
Remove set_printoptions already.
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2013-03-14T02:26:37Z
2013-09-27T00:36:48Z
2013-09-27T00:36:48Z
NONE
null
So, 0.11 was released a couple of months ago, 0.12 is fast approaching and `set_printoptions`/`reset_printoptions` have had a deprecation warning attached to them since 0.10.0. Isn't it time to remove them?
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3,047
'datetime64[ns]' columns cause fillna function fail
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2013-03-14T03:13:54Z
2013-03-20T12:40:35Z
2013-03-15T12:59:04Z
NONE
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- pd.version: 0.11.0.dev-156e03c - if dataframe had a column which had been recognized as 'datetime64[ns]' type, calling the dataframe's fillna function would cause an expection. ``` python In [149]: df_t1 = DataFrame({'int': [1, 2, None], 'date_obj': [datetime.datetime(2012, 1, 1), datetime.datetime(2012, 1, 1), None...
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3,048
BUG: str.contains ignored na argument GH2806
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2013-03-14T03:14:26Z
2014-07-01T21:30:07Z
2013-03-14T03:40:17Z
NONE
null
closes #2806
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DOC: more cook examples
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ENH: Allow setitem in a frame where only mixed numerics are present
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2013-03-14T11:39:34Z
2014-06-27T07:44:21Z
2013-03-15T12:22:45Z
CONTRIBUTOR
null
this implements #3037 previously would failed if mixed_types was true, so mixed int/float would fail
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DOC: more examples
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12,041,593
MDU6SXNzdWUxMjA0MTU5Mw==
3,053
BUG: loc is not expanding an integer slice as labels
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2013-03-14T22:11:46Z
2013-03-14T23:58:14Z
2013-03-14T23:58:14Z
CONTRIBUTOR
null
see #2904 at the end
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12,043,338
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3,054
optimize to_csv if formatting isn't needed
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4
2013-03-14T23:00:05Z
2013-03-20T01:00:09Z
2013-03-20T01:00:09Z
CONTRIBUTOR
null
http://stackoverflow.com/questions/15417574/what-is-the-fastest-way-to-output-large-dataframe-into-a-csv-file
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12,044,049
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3,055
BUG: loc was failing on integer slices (incorrect implementation), GH 3053
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2013-03-14T23:21:09Z
2014-06-27T18:27:59Z
2013-03-14T23:58:07Z
CONTRIBUTOR
null
fixes #3053 see also #2904
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MDU6SXNzdWUxMjA0NTUxMA==
3,056
BUG: Add DataFrame column with dot notation fails
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2013-03-15T00:14:48Z
2013-03-15T20:47:46Z
2013-03-15T20:47:46Z
CONTRIBUTOR
null
It seems like something weird is going on with the example below. I often create a new column by mapping an old column. If I use dot notation with the creation of the new column the column is created and is accessible using dot notation, but it isn't listed as a column and can't be indexed the normal way (i.e. df['idx...
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12,045,687
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3,057
Partial Selection on MultiIndex: Control what index depth is returned.
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2013-03-15T00:22:57Z
2014-02-13T23:12:31Z
2014-02-13T23:12:31Z
NONE
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Partial selection using .xs() & .ix[] on a subset of index levels returns a df with the fixed/selected levels dropped (a very nice feature). However, when you partially select using a tuple on all levels you get a data frame with all indices (levels) returned. It would be nice to have an option to return any/all indice...
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3,058
BUG: Handle concat of series with same name, GH2972
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2013-03-15T03:13:33Z
2014-06-30T15:11:12Z
2013-03-16T00:21:25Z
CONTRIBUTOR
null
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12,049,172
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3,059
ENH: improve performance of df.to_csv GH3054
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2013-03-15T03:26:12Z
2014-06-12T04:44:09Z
2013-03-19T11:37:53Z
NONE
null
Needs more testing before merging. Following [SO question](http://stackoverflow.com/questions/15417574) mentioned in #3054: ``` python In [7]: def df_to_csv(df,fname): ...: fh=open(fname,'w') ...: fh.write(','.join(df.columns) + '\n') ...: for row in df.itertuples(index=False): ...: sl...
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12,052,519
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3,060
ENH: support for nanosecond time in offset and period
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67
2013-03-15T07:24:05Z
2014-06-18T11:32:43Z
2013-09-30T19:43:55Z
CONTRIBUTOR
null
closes #1812 This pull request fixes handling of nanosecond times in periods and offsets. In addition it simplifies the internal processing of intraday periods. ``` python In []: pd.date_range('2013-01-01', periods=5, freq=pd.offsets.Nano(5)) Out[]: <class 'pandas.tseries.index.DatetimeIndex'> [2013-01-01 00:00:00, ...
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12,072,137
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3,061
Pandas Tutorials (Ipython notebooks)
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2013-03-15T17:06:29Z
2014-05-06T12:01:53Z
2013-03-19T23:08:05Z
NONE
null
Hi all, Below is a link to some tutorials I put together for new pandas users, feel free to add them where you see fit. https://bitbucket.org/hrojas/learn-pandas David
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3,062
BUG: read_csv not correctly infering datetime64[ns] with embedded nan/NaT
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2013-03-15T20:30:26Z
2013-05-16T13:38:33Z
2013-05-16T13:38:33Z
CONTRIBUTOR
null
This is known, but putting up for reference easy (after reading) workaround, but could be done inilne ``` In [28]: df = pd.DataFrame(dict({ 'A' : np.asarray(range(10),dtype='float64'), 'B' : pd.Timestamp('20010101') })) In [29]: df.ix[3:6,:] = np.nan In [30]: df Out[30]: A B 0 0 2001-01...
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MDExOlB1bGxSZXF1ZXN0NDY1MDcyNQ==
3,063
Scatter matrix labels fix
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5
2013-03-16T00:54:27Z
2014-06-12T12:30:37Z
2013-03-18T19:07:09Z
CONTRIBUTOR
null
fix scatter matrix axis labels for odd number of columns https://github.com/pydata/pandas/issues/2756
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3,064
BUG: Handle Series arguments in DataFrame.replace, fixes GH2994
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CONTRIBUTOR
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12,095,278
MDExOlB1bGxSZXF1ZXN0NDY1MzA3Mg==
3,065
BUG/ENH: guarantee blocks will upcast as needed, and split as needed
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2013-03-16T14:05:29Z
2014-07-16T08:05:32Z
2013-03-16T15:00:05Z
CONTRIBUTOR
null
- replace on an IntBlock with a float will upcast, it may yield multiple blocks if the original IntBlock didn't fully replace - small fix in com.mask_missing to guarantee that a bool ndarray is returned even in the case of a string comparison with a numeric array, (which for some reason numpy returns a single, non-ndar...
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12,096,079
MDU6SXNzdWUxMjA5NjA3OQ==
3,066
Add df.split with predicate function
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2013-03-16T15:09:42Z
2014-06-07T16:57:58Z
2013-11-22T10:01:18Z
NONE
null
xref: http://stackoverflow.com/questions/13353233/best-way-to-split-a-dataframe-given-an-edge/15449992#15449992 Here's one for you, jeff.
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12,097,504
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3,067
cython dependency and a pip tip
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4
2013-03-16T17:08:08Z
2013-06-07T14:31:45Z
2013-03-17T13:54:05Z
CONTRIBUTOR
null
Some advice that would've helped me when I was first trying to get the development version working.
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MDExOlB1bGxSZXF1ZXN0NDY1NDU0MQ==
3,068
BUG: fixes in replace to deal with block upcasting
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2013-03-16T19:45:30Z
2014-07-01T17:38:18Z
2013-03-16T20:18:25Z
CONTRIBUTOR
null
ENH: - _maybe_upcast_putmask now has the keyword, change to provide inline putmask changes to an object (series) - apply in BlockManager now has a keyword, filter to allow acting on only those items contained in the filter (if supplied) CLN: - consolidated all replace subs to main replace in DataFrame (which calls r...
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3,069
fragile test on travis, test_pytables:TestHDFStore.test_append_with_data_columns
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2013-03-17T01:21:36Z
2013-12-04T00:46:54Z
2013-03-31T23:44:44Z
NONE
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Same commit passed/failed: https://travis-ci.org/y-p/pandas/builds/5559816 https://travis-ci.org/pydata/pandas/builds/5558843
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12,103,559
MDU6SXNzdWUxMjEwMzU1OQ==
3,070
Allow Timeseries-like shortcuts in dataframes __getitem__
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2013-03-22T16:20:40Z
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``` python In [17]: s=pd.date_range("2001-1-1", periods=12) In [20]: ts['2001'] Out[20]: 2001-01-01 0 2001-01-02 1 2001-01-03 2 2001-01-04 3 2001-01-05 4 2001-01-06 5 2001-01-07 6 2001-01-08 7 2001-01-09 8 2001-01-10 9 2001-01-11 10 2001-01-12 11 Freq: D, dtype: int64 In ...
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3,071
read_csv(date_parser=x) fails because datetime.datetime has no dtype
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CONTRIBUTOR
null
``` python from cStringIO import StringIO log_file = StringIO( 'posix_timestamp,elapsed,sys,user,queries,query_time,rows,' 'accountid,userid,contactid,level,silo,method\n' '1343103150,0.062353,0,4,6,0.01690,3,' '12345,1,-1,3,invoice_InvoiceResource,search\n' ) import pandas as pd from datetime ...
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3,072
BUG: replace with a dict misbehaving (GH 3064), due to incorrect filtering
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2013-03-17T03:14:09Z
2013-03-17T18:38:37Z
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CONTRIBUTOR
null
rolled #3064 changes in here
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MDExOlB1bGxSZXF1ZXN0NDY1NjQ4Mw==
3,073
Fix figsize issue when using matplotlib locally
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1
2013-03-17T05:51:24Z
2013-04-08T16:24:58Z
2013-04-08T16:24:46Z
CONTRIBUTOR
null
This is a pretty minor issue, but I'm seeing the following when passing `figsize=(20,10)` when plotting a Series in the `ipython --pylab` environment: ![Series_figsize](https://f.cloud.github.com/assets/440095/267751/46f8b184-8ebd-11e2-8631-2131ce0421f6.png) Everything's there - the window is just initialized to the ...
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12,110,113
MDU6SXNzdWUxMjExMDExMw==
3,074
can't install pandas use pip on mac
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34
2013-03-17T15:34:20Z
2016-10-13T09:13:53Z
2013-03-20T08:16:47Z
NONE
null
the error log is Searching for pandas Reading http://pypi.python.org/simple/pandas/ Reading http://pandas.pydata.org Reading http://pandas.sourceforge.net Download error: [Errno 60] Operation timed out -- Some packages may not be found! Best match: pandas 0.10.1 Downloading http://pypi.python.org/packages/source/p/pan...
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12,111,758
MDU6SXNzdWUxMjExMTc1OA==
3,075
Improved default color scheme for pylab
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2013-03-17T17:44:34Z
2013-03-23T00:42:45Z
2013-03-23T00:42:45Z
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https://gist.github.com/huyng/816622 ![a](https://f.cloud.github.com/assets/1820866/268382/32fd940c-8f2a-11e2-801b-5f4217ac409a.png) ``` python s={'axes.axisbelow': True, 'axes.color_cycle': ['#348ABD', '#7A68A6', '#A60628', '#467821', '#CF4457', '#188487', '#E24A33'], 'axes.edgecolor': '#bcbcbc', 'axe...
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3,076
ENH: add iterator support for select in HDFStore
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2013-03-17T19:24:20Z
2013-03-18T01:15:54Z
2013-03-18T01:15:54Z
CONTRIBUTOR
null
http://stackoverflow.com/questions/15463183/hdfstore-select-as-multiple-generator
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3,077
ENH: add append keyword to csv writer for easy multiple call appending
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2
2013-03-17T19:31:23Z
2016-07-31T18:35:14Z
2016-07-31T18:35:14Z
CONTRIBUTOR
null
http://stackoverflow.com/questions/15462344/writing-the-result-of-multiple-calls-on-a-manipulated-dataframe
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3,078
ENH: support iteration on returned results in select and select_as_multiple in HDFStore
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2013-03-18T01:15:47Z
2014-07-04T12:26:26Z
2013-03-18T14:36:10Z
CONTRIBUTOR
null
New keywords `iterator=a_boolean` and `chunksize=number_in_a_chunk`, (default is 50,000) rows are provided to support iteration on `select` and `select_as_multiple` results DOC and TST included closes #3076
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12,117,955
MDExOlB1bGxSZXF1ZXN0NDY2MDkyOA==
3,079
DOC/CLN: cookbook addition, minor cleaning in internals.py
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2013-03-18T01:26:10Z
2013-03-18T14:10:00Z
2013-03-18T14:10:00Z
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12,122,019
MDExOlB1bGxSZXF1ZXN0NDY2MjU0OA==
3,080
Int bug
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2013-03-18T06:11:14Z
2014-06-29T10:22:15Z
2013-04-08T17:04:06Z
CONTRIBUTOR
null
slightly different fix for #3071
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3,081
Diff on datetime64 column evoking "ValueError: Could not convert object to NumPy datetime"
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2013-03-18T13:00:51Z
2013-06-14T16:14:45Z
2013-03-20T08:34:01Z
MEMBER
null
With pandas 0.10.1 and numpy 1.7.0 (Anaconda 1.4.0), I get a ValueError when trying to use the `diff` method on a datetime64 column or series. Eg: ``` python In [3]: t = np.arange(start='2012-01-01 00:00:01', stop='2012-01-01 00:00:10', d type='datetime64') In [4]: df = pd.DataFrame(np.arange(len(t))) In [5]: df['t...
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12,141,438
MDU6SXNzdWUxMjE0MTQzOA==
3,082
Daily data resampling default behavior
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2013-03-18T16:26:32Z
2013-03-18T16:33:53Z
2013-03-18T16:33:53Z
MEMBER
null
from @dhirschfeld I just ran across the bug described in issue #3020 (https://github.com/pydata/pandas/issues/3020) as our unit-tests started failing after upgrading pandas. I did a git bisection and found the first bad commit to be 9deda9e6: ``` 9deda9e687915017cc9db7698504ead1f89ead9e is the first bad commit commi...
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MDU6SXNzdWUxMjE0ODUyMg==
3,083
Integer partial slicing on multiindex bug
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2013-03-18T18:59:46Z
2015-01-26T00:45:21Z
2015-01-26T00:45:21Z
CONTRIBUTOR
null
similar to one encountered in @wesm pydata 2013 tutorial ``` In [9]: import pandas as pd In [10]: idx = pd.MultiIndex.from_arrays([[2011,2011,2012,2012,2013], [1,2,1,2,1]]) In [11]: ser = pd.Series(randn(len(idx)), idx) In [12]: ser Out[12]: 2011 1 -0.485310 2 -0.679528 2012 1 1.089995 2 -0.1...
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3,084
Added count of columns when DataFrame is printed out
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2013-03-18T21:18:48Z
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CONTRIBUTOR
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12,152,861
MDExOlB1bGxSZXF1ZXN0NDY3NzgzNw==
3,085
Resample docstring default values changed
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2013-03-18T20:30:09Z
2014-07-09T07:31:43Z
2013-03-25T15:34:30Z
CONTRIBUTOR
null
This docstring seems better, since TimeGrouper specifies it [that way](https://github.com/pydata/pandas/blob/master/pandas/tseries/resample.py#L27) too:
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ENH: tokenize as a str function
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2013-03-18T21:26:15Z
2019-01-01T17:29:36Z
2019-01-01T17:29:35Z
CONTRIBUTOR
null
maybe do it like the nltk tokenizer and handle stuff like punctuations, various brackets, and quotes. And have optional delimiters.
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3,087
BUG: resample doesn't work for non-numeric types
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2013-03-19T10:43:47Z
2018-07-06T23:03:46Z
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CONTRIBUTOR
null
After discussion on the ML it was decided the below function _should_ work in pandas. It fails on the current master (0.11.0.dev-308beb1) with 32bit Python 2.7 on windows ``` python def test_resample_nonnumeric(): import numpy as np import pandas as pd dates = pd.date_range('01-Jan-2014','05-Jan-2014', fr...
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ENH: better errors message on storage failure in HDFStore
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3,089
PERF: regression from 0.10.1
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2013-03-19T15:42:34Z
2013-03-21T21:32:55Z
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CONTRIBUTOR
null
f6ac8c091dfb2bbbbb02a34c13022c5427b290eb to 05a737dbb9f857e25a211739d90c42f3d9428b8e Bad news: ``` Results: t_head t_baseline ratio name reindex_frame_level_reindex 1.1343 0.7571...
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3,090
Remove old csv_helper code before releasing 0.12
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NONE
null
a reminder, new `df.to_csv()` code was introduced in 0.11. the old code is still available via the `engine=python` kwd as a failsafe against bugs discovered after release. If all is well come 0.12 time, 7776128 can be revert and dead code eliminated.
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3,091
Pandas HDFStore conflicts with osgeo library, but works fine if osgeo is imported after HDFStore was used
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2013-03-19T17:53:44Z
2013-03-20T10:15:37Z
2013-03-20T10:15:37Z
NONE
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If I import some osgeo modules (e.g., osgeo.ogr or osgeo.gdal), I get some serious error message (**_HDF5 library version mismatched error**_) when I try to store a pandas DataFrame in a just created HDFStore. Following, it requests the Runtime to terminate it in an unusual way. See below: > > > store = pd.HDFStore(fn...
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ENH: create BlockManager positional indexer (for easier dupe cols support)
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2013-03-19T18:25:16Z
2013-05-02T14:52:43Z
2013-05-02T14:52:43Z
CONTRIBUTOR
null
see discussion in #3059, #3095, also see #1943, #3102 This only applies with a non-unique column index Currently if duplicate columns across dtypes there are issues in getting the correct block given a column name. I think it is possible, though non-trivial, to instead have a positional map from the frame columns to...
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PERF: added convert=boolean to take to enable negative index conversion
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2013-03-19T18:51:23Z
2013-03-19T23:54:32Z
2013-03-19T18:51:33Z
CONTRIBUTOR
null
mainly for user facing routines (defaults to True) was causing a perf regression (see #3089) #3033 will 'fix' this as will create a new internal routine to do takes (and make DataFrame/take) user facing only
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3,094
0.11.0.dev-4b22372.win-amd64-py2.7: nosetests error
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14
2013-03-19T19:00:26Z
2013-03-23T17:38:05Z
2013-03-23T17:38:05Z
NONE
null
## ERROR: test_operators_timedelta64 (pandas.tests.test_series.TestSeries) Traceback (most recent call last): File "C:\Python27\lib\site-packages\pandas\tests\test_series.py", line 1752, i n test_operators_timedelta64 result = resultb + df['A'] File "C:\Python27\lib\site-packages\pandas\core\series.py", line 1...
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12,196,758
MDU6SXNzdWUxMjE5Njc1OA==
3,095
Allow duplicate columns in df.to_csv
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13
2013-03-19T19:11:25Z
2013-04-30T18:20:28Z
2013-04-30T18:18:36Z
NONE
null
Continuing #3059. See also #3092 - allow dupe columns when they are in the same block/dtype - Perhaps figure out a way to handle that case as well.
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12,196,798
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3,096
Make IntArrayFormatter and all upstream users able to specify formatting for integer types
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3
2013-03-19T19:12:20Z
2014-05-29T06:26:58Z
2014-05-29T06:26:58Z
CONTRIBUTOR
null
This was found while attempting to add thousand separators (commas) on a Series.to_string() call. It looks like you can specify the format for floats, but not for integers. It's impossible right now. I could transform the Series instance into a FP representation, but that is the wrong thing to do.
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Build Issue
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2013-03-19T20:04:10Z
2013-03-20T06:53:45Z
2013-03-20T06:53:45Z
MEMBER
null
There's a build issue with the latest version. The issue is that an `import time` statement in `tslib.pyx` triggers an error from Cython stating: "Assignment to non-lvalue 'time'" `git bisect` between `HEAD` and the SHA1 of the 10.1 release (builds correctly) shows that 015447a introduces this bug. What's strange is t...
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3,098
BLD: fix time module import conflict
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5
2013-03-19T21:21:38Z
2013-03-20T00:31:03Z
2013-03-20T00:30:53Z
MEMBER
null
See #3097.
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https://api.github.com/repos/pandas-dev/pandas/issues/3099
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3,099
Fix setup.py cython cache hack for fast all-py versions testing with tox
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1
2013-03-19T22:15:02Z
2013-03-20T18:55:45Z
2013-03-20T18:55:28Z
NONE
null
This looks like it broke during the cython refactor a couple of months ago, which is a shame, because it allowed to test python-only (no pyx changes) changes on py26/27/32/33 in about a minute, where travis takes about 15. There's also the detox project for doing what tox_prll does, but it seems to have diverged from ...
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3,100
ENH: support diff with datetime64[ns] on series/frame
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1
2013-03-19T23:56:04Z
2013-06-14T16:14:45Z
2013-05-09T18:53:09Z
CONTRIBUTOR
null
see #2984 workaround right now is ``` In [4]: s = pd.Series(pd.date_range('20130102',periods=5)) In [5]: s Out[5]: 0 2013-01-02 00:00:00 1 2013-01-03 00:00:00 2 2013-01-04 00:00:00 3 2013-01-05 00:00:00 4 2013-01-06 00:00:00 dtype: datetime64[ns] This is the workaround right now In [6]: s-s.shift(1) Out[...
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