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https://api.github.com/repos/pandas-dev/pandas/issues/8501
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45,130,854
MDExOlB1bGxSZXF1ZXN0MjIzNjY1Mzg=
8,501
Raise more specific exception on concat([None])
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8
2014-10-07T16:45:26Z
2014-10-10T12:17:40Z
2014-10-10T12:17:40Z
CONTRIBUTOR
null
More specific exception allows for a safer, more explicit catch by a caller. ConcatenationError follows the pattern of MergeError which is used in the same file when something is wrong with a caller's inputs to merge().
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45,138,835
MDU6SXNzdWU0NTEzODgzNQ==
8,502
BUG: matplotlib.__version__ is unicode
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0
2014-10-07T17:55:47Z
2014-10-07T19:57:11Z
2014-10-07T19:57:11Z
CONTRIBUTOR
null
see here: https://ci.appveyor.com/project/jreback/pandas/build/1.0.455/job/2avadnw54tpv3lob so it appears that matplotlib changed the version string in 1.4.0 to be `unicode` (and not a string). (to be honest I would call that a bug, separate issue). BUT our tests now fail because of this, I guess `str(matploblib.__v...
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45,139,234
MDU6SXNzdWU0NTEzOTIzNA==
8,503
SparseDataFrame with 0.0001 density using full memory
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5
2014-10-07T17:59:08Z
2014-10-08T14:56:20Z
2014-10-07T18:05:53Z
NONE
null
Hi, I discovered the SparseDataFrame very recently and ran into the following: ``` python In [19]: %paste In [6]: df = DataFrame(randn(10000, 4)) In [7]: df.ix[:9998] = np.nan In [8]: sdf = df.to_sparse() ## -- End pasted text -- In [20]: sdf.values.nbytes == randn(10000,4).nbytes Out[20]: True In [21]: sdf.densi...
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45,149,877
MDExOlB1bGxSZXF1ZXN0MjIzNzY1OTg=
8,504
COMPAT: matplotlib 1.4.0 version compat (GH8502)
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0
2014-10-07T19:18:10Z
2014-10-07T19:57:11Z
2014-10-07T19:57:11Z
CONTRIBUTOR
null
closes #8502
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45,209,189
MDU6SXNzdWU0NTIwOTE4OQ==
8,505
Behavior of pandas.DataFrame.duplicated()
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2
2014-10-08T06:34:28Z
2015-08-08T19:46:01Z
2015-08-08T19:46:01Z
NONE
null
While trying to get handle on duplicated records I stumble upon [this](http://stackoverflow.com/questions/26244309/how-to-analyze-all-duplicate-entries-in-this-pandas-dataframe) which lead to conclusion that `.duplicated(take_last=True)` seem to be taking the first of duplicate rows and `.duplicate(take_last=False)` ta...
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45,223,228
MDU6SXNzdWU0NTIyMzIyOA==
8,506
groupby.apply raises ValueError when as_index=True on 0.15 RC1
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2014-10-08T09:37:35Z
2014-10-08T09:57:25Z
2014-10-08T09:57:25Z
NONE
null
Hello, The following code ran perfectly fine on 0.14.1, but breaks on 0.15 RC1, raising ValueError: cannot reindex from a duplicate axis. Is it a bug or an intended change of behaviour? Thanks. ``` python import pandas as pd import numpy as np d = {'Quantity' : pd.Series([1., 2., 3., 4., 5.], ...
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8,507
DOC: Update ecosystem.rst: Add IDE, IPython, qgrid, Spyder, API, quandl, Out-of-core, Blaze
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14
2014-10-08T10:58:17Z
2014-10-13T14:21:33Z
2014-10-13T14:20:11Z
CONTRIBUTOR
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45,260,662
MDU6SXNzdWU0NTI2MDY2Mg==
8,508
Allow writing to S3 paths
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19
2014-10-08T15:48:29Z
2019-12-17T18:14:09Z
2019-12-17T18:14:09Z
CONTRIBUTOR
null
It would be really great if `to_(filetype)` supported writing to S3. Here is an example upload to s3 function that takes in a local file and places it on a s3 bucket. ``` python def upload_to_s3(local_file_path, file_name, bucket_name, s3_directory): """ Returns ---------- Uploads local file to appro...
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8,509
numpy FutureWarning in df.equals
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9
2014-10-08T19:42:39Z
2014-10-30T11:19:44Z
2014-10-08T20:06:42Z
MEMBER
null
From the example in the v0.13.1 whatsnew docs (http://pandas.pydata.org/pandas-docs/version/0.15.0/whatsnew.html#id12): ``` df = DataFrame({'col':['foo', 0, np.nan]}).sort() df2 = DataFrame({'col':[np.nan, 0, 'foo']}, index=[2,1,0]) df.equals(df) ``` gives: ``` In [3]: df.equals(df) C:\Anaconda\lib\site-packages\num...
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8,510
DOC: fix example sql chunksize
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2014-10-08T19:45:27Z
2014-10-08T20:14:52Z
2014-10-08T20:14:52Z
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45,288,711
MDU6SXNzdWU0NTI4ODcxMQ==
8,511
Indexing problem with in-place operator
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2
2014-10-08T19:55:26Z
2014-10-09T13:36:59Z
2014-10-09T13:36:59Z
CONTRIBUTOR
null
Hi, thanks to all of you who spend time on this project, it is invaluable to me. Unfortuatnely, i think I have run into an indexing-type issue, either that or my expectations are incorrect. Consider the following script: ``` python import random import pandas import numpy as np columns = list('abcdefg') subcols = co...
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MDExOlB1bGxSZXF1ZXN0MjI0NTQwMjU=
8,512
BUG: Suppress FutureWarning when comparing object arrays
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53
2014-10-08T20:55:57Z
2014-10-30T11:20:22Z
2014-10-10T01:17:56Z
CONTRIBUTOR
null
Fixes #7065
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8,513
ENH: axvlines - boolean option to parallel_coordinates plot
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2014-10-08T21:22:27Z
2015-09-03T15:25:02Z
2014-12-05T20:16:33Z
CONTRIBUTOR
null
Determines whether vertical lines will be added to parallel_coordinates plot. I was using parallel coordinates to make a seasonality chart - plotting years on top of each other (days/months of year on x-axis). With that many xticks, the vertical lines were overwhelming. It's possible to remove the lines after the fact,...
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8,514
pd.option_context without 'with' changes option values
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3
2014-10-08T21:25:21Z
2014-11-29T16:48:19Z
2014-11-29T16:48:19Z
MEMBER
null
Just wondering if this is a bug, from http://stackoverflow.com/questions/26246864/restoring-the-default-display-context-in-pandas If you use `pd.option_context` accidentally without `with`, this changes the default option values.
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8,515
Module xlrd is not installed with 0.14; creates an Import Error when using read_excel
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2014-10-08T21:30:17Z
2017-09-21T18:15:44Z
2014-10-08T22:49:43Z
NONE
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After doing ``` conda create -n dummy_python python=2.7 pandas=0.14 ipython=2.0 ``` and then activating dummy_python, I get the following error with a simple .xlsx file that has 3 sheets: ``` python In [4]: pandas.read_excel('candidate_test.xlsx', sheetname='prices') -------------------------------------------------...
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8,516
add xray to ecosystem docs?
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1
2014-10-08T22:00:26Z
2014-10-10T22:32:42Z
2014-10-10T22:32:42Z
MEMBER
null
Would it be appropriate to add [xray](https://github.com/xray/xray) to the ecosystem docs? In brief, the goal of xray is to provide N-dimensional variants of the core pandas data structure (e.g., [as more flexible alternatives to pd.Panel](http://xray.readthedocs.org/en/stable/faq.html)).
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8,517
Feature request: Series.flatmap, DataFrame.flatmap
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21
2014-10-09T03:35:17Z
2019-05-31T23:45:20Z
2015-10-20T23:14:36Z
NONE
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I'm working on some language analysis and using pandas to munge the data and grab some descriptive stats. This is just an illustrative example, I'm doing all kinds of slighty different things. Suppose I have a series containing chunks of text, and I want to turn the line into multiple lines, preserving the index value...
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45,344,939
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8,518
BUG: read_pickle and categorical data
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2014-10-09T09:27:40Z
2014-10-10T12:50:13Z
2014-10-10T12:50:13Z
NONE
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I can pickle dataframes with categoricals but not import them again. Since HDF is officially not supported yet: is there any working alternative for persistence of categoricals? ``` python df = pd.DataFrame({'a':['x','y','x']}) df.to_pickle('/tmp/df.pkl') pd.read_pickle('/tmp/df.pkl') df['a'] = df['a'].astype('cate...
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8,519
BUG: fix CategoricalBlock pickling
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12
2014-10-09T11:21:56Z
2014-10-10T13:17:54Z
2014-10-10T12:50:13Z
CONTRIBUTOR
null
This should fix #8518. Apparently, `NonConsolidatableMixIn.__init__` was copied from a pre-`BlockPlacement` version of `SparseBlock.__init__` which was incompatible with placement being a slice. The current one is, so I moved it to NonConsolidatableMixIn class almost verbatim.
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45,358,277
MDExOlB1bGxSZXF1ZXN0MjI0ODg0NDI=
8,520
BUG: Bug in inplace operations with column sub-selections on the lhs (GH8511)
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0
2014-10-09T12:06:03Z
2014-10-09T13:36:59Z
2014-10-09T13:36:59Z
CONTRIBUTOR
null
closes #8511 closes #5104
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45,371,660
MDU6SXNzdWU0NTM3MTY2MA==
8,521
ENH: resample(..., base='start') for automaticly determining base.
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8
2014-10-09T14:19:41Z
2020-05-10T15:52:55Z
2020-05-10T15:52:55Z
NONE
null
(edit): ```python import pandas as pd import datetime as dt import numpy as np datetime_start = dt.datetime(2014, 9, 1, 9, 30) datetime_end = dt.datetime(2014, 9, 1, 16, 0) tt = pd.date_range(datetime_start, datetime_end, freq='1Min') df = pd.DataFrame(np.arange(len(tt)), index=tt, columns=['A']) ``` ...
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45,390,139
MDU6SXNzdWU0NTM5MDEzOQ==
8,522
Error with all boolean indices for Series
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5
2014-10-09T16:53:56Z
2014-10-10T08:36:26Z
2014-10-09T18:32:16Z
NONE
null
The following code works fine with pandas 0.14.1 ``` python import pandas as pd pd.Series([1, 1], index=[True, False]).drop(True) ``` Output: ``` python False 1 dtype: int64 ``` In pandas 0.15rc1, the code blows up and produces the following error: ``` ValueError Traceback (most r...
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45,392,182
MDExOlB1bGxSZXF1ZXN0MjI1MDg1MDA=
8,523
BUG/REGR: bool-like Indexes not properly coercing to object (GH8522)
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0
2014-10-09T17:11:37Z
2014-10-09T18:32:16Z
2014-10-09T18:32:16Z
CONTRIBUTOR
null
closes #8522
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https://api.github.com/repos/pandas-dev/pandas/issues/8524
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45,422,175
MDU6SXNzdWU0NTQyMjE3NQ==
8,524
Klib upgrade (factorizing performance increase)
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16
2014-10-09T21:50:24Z
2019-10-21T20:06:54Z
null
NONE
null
Hi, I'm working with two colleagues (@FrancescElies & @JaviBi4) on seeing if we can add groupby to bcolz, what we did first was to see if we can make Pandas' excellent klib implementation more library independent. See https://github.com/CarstVaartjes/khash A while back khash (https://github.com/attractivechaos/klib) w...
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https://api.github.com/repos/pandas-dev/pandas/issues/8525
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45,433,482
MDU6SXNzdWU0NTQzMzQ4Mg==
8,525
DataFrame throws MemoryError (pandas/lib.c:9308)
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2
2014-10-10T00:21:53Z
2015-10-20T23:12:51Z
2015-10-20T23:12:51Z
MEMBER
null
I didn't find any search results for this particular Exception: ``` >>> df2 = pandas.DataFrame(df_data, index=df_ind, columns=df_cols) python(86000,0x7fff7a7aa310) malloc: *** mach_vm_map(size=200447690256384) failed (error code=3) *** error: can't allocate region *** set a breakpoint in malloc_error_break to debug Tr...
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45,441,435
MDExOlB1bGxSZXF1ZXN0MjI1Mzc1NDE=
8,526
index into multi-index past the lex-sort depth
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21
2014-10-10T02:56:48Z
2014-11-22T14:47:11Z
2014-11-21T23:20:24Z
CONTRIBUTOR
null
closes https://github.com/pydata/pandas/issues/7724 closes https://github.com/pydata/pandas/issues/2646 on current master: ``` >>> df jolia jim joe jolie joline 1 z 2014-10-14 a 30 y 2014-10-13 b 3 x 2014-10-12 c 15 0 z 2014-10-11 ...
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45,463,071
MDU6SXNzdWU0NTQ2MzA3MQ==
8,527
Choose correct datatype when creating new dataframe column from old ones
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13
2014-10-10T09:36:32Z
2014-10-17T07:22:32Z
2014-10-17T07:22:32Z
NONE
null
I am converting a Stata dataset to a dataframe, then multiply two columns to create a third one. The chosen datatype for the two columns is int8 and for some reason the new column blindly follows that. For instance, this code ``` Python df = pd.read_stata(file) df['w_age_educ'] = df['w_age'] * df['weduc'] print(df[['...
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https://api.github.com/repos/pandas-dev/pandas/issues/8528
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45,464,941
MDU6SXNzdWU0NTQ2NDk0MQ==
8,528
rot parameter for BARH plots
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2
2014-10-10T09:58:33Z
2015-10-20T23:13:01Z
2015-10-20T23:13:01Z
CONTRIBUTOR
null
when doing dataframe.plot(kind='barh',rot=45), then the labels of the y axis are rotated. Generally rotation is applied to avoid label overlapping, and that's a problem mostly for the x axis. Should not therefore the keyword apply to the x axis, even though technically the y axis is the "category axis" in this case?
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45,466,872
MDU6SXNzdWU0NTQ2Njg3Mg==
8,529
fontsize parameter in .plot()
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1
2014-10-10T10:24:40Z
2014-10-11T14:10:23Z
2014-10-11T14:10:23Z
CONTRIBUTOR
null
This parameter apparently only affects the main axis. Should it not apply also to the other axis, and possibly to other elements as well, such as legend and labels?
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MDU6SXNzdWU0NTQ2OTAwNQ==
8,530
Series.drop() with boolean index: inconsistent behaviour
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2014-10-10T10:55:54Z
2018-07-08T14:32:51Z
2018-07-06T23:03:34Z
NONE
null
The behaviour below occurs in versions `'0.15.0rc1-21-g32c5016'` and `'0.14.1'`. When the `label` passed to the `drop` method of a `Series` is not in the index: (a) if the index is not all booleans then an error is raised (b) if the index is all booleans and has length > 1 then no error is raised; the original series ...
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45,471,665
MDU6SXNzdWU0NTQ3MTY2NQ==
8,531
bug in tz_localize when summer/winter time change
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29
2014-10-10T11:36:13Z
2018-06-18T22:34:30Z
2018-06-18T22:34:30Z
NONE
null
Works with datetime.datetime, does not work with pandas.tslib.Timestamp. Encounter the issue when trying to resample hourly a series. ``` import pandas as pd from datetime import datetime as dt import pytz tz = 'Europe/Berlin' d = dt(2014,10,26,02,00) tz = pytz.timezone(tz) tz.localize(d) x = pd.Series(0., [d]).ind...
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https://api.github.com/repos/pandas-dev/pandas/issues/8532
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45,490,259
MDU6SXNzdWU0NTQ5MDI1OQ==
8,532
BUG: Series not correctly formatted in truncated output
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2014-10-10T15:05:59Z
2015-03-17T00:18:39Z
2015-03-17T00:18:39Z
MEMBER
null
Overview of the issues: - [ ] Number of rows is incorrect (#7508) - [ ] Setting `pd.options.display.max_rows` to larger values has no effect (https://github.com/pydata/pandas/issues/7508#issuecomment-58669898) - [ ] formatting seems to occur seperately for both parts (this issue #8532, see two exaples below) --- When...
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45,495,922
MDU6SXNzdWU0NTQ5NTkyMg==
8,533
Accept SQLAlchemy Connection as con param in pd.read_sql_query()
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1
2014-10-10T15:59:57Z
2015-05-12T08:33:59Z
2015-05-12T08:33:50Z
CONTRIBUTOR
null
Currently `pd.read_sql_query()` accepts an `sqlalchemy.engine.base.Engine` instance as the `con` parameter. Using that, it presumably creates a new `sqlalchemy.engine.base.Connection` to connect to the DB server and issue the query. However, as most (all?) DB servers associate a session with a connection, this preclud...
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https://api.github.com/repos/pandas-dev/pandas/issues/8534
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45,508,188
MDExOlB1bGxSZXF1ZXN0MjI1NzgyMDA=
8,534
Add xray to ecosystem docs
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3
2014-10-10T18:11:45Z
2014-10-10T22:38:00Z
2014-10-10T22:32:42Z
MEMBER
null
Fixes #8516
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https://api.github.com/repos/pandas-dev/pandas/issues/8535
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45,539,292
MDExOlB1bGxSZXF1ZXN0MjI1OTgzNjY=
8,535
DOC: Clean up Sphinx Issues, fix tabs, in Cookbook
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2014-10-11T02:48:43Z
2015-02-09T00:43:14Z
2014-10-13T02:19:33Z
CONTRIBUTOR
null
This is a follow on PR as a result of [seeing travis and sphinx render ~30 in line examples for the cookbook](https://github.com/pydata/pandas/pull/8288#issuecomment-58734824). Continues to address #6918 Initial PR: https://github.com/pydata/pandas/pull/8288 PS - apologies for wanting to rush the first PR. My eveni...
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45,550,121
MDExOlB1bGxSZXF1ZXN0MjI2MDMyNDA=
8,536
BUG: Dont add None to plot legend.
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2014-10-11T12:40:15Z
2017-04-05T02:06:09Z
2014-10-11T19:27:25Z
CONTRIBUTOR
null
Closes https://github.com/pydata/pandas/issues/8491 Building the docs now to check that everything looks ok.
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8,537
Deprecation/FutureWarnings raised by `==` on NumPy arrays in NumPy version1.9
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2014-10-11T14:41:45Z
2015-10-18T23:52:37Z
2015-10-18T23:52:37Z
CONTRIBUTOR
null
This continues a discussion started at the end of GH 8512 Summary: NumPy is changing the behavior of `==`. It no longer checks for `is` relationships between elements. Therefore, In older versions of NumPy: > > > array([nan], dtype=object) == array([nan], dtype=object) > > > array([ True], dtype=bool) In future Num...
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45,553,932
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8,538
PERF: speed up tshift, possibly by caching offset ops
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2014-10-11T15:23:35Z
2018-07-08T14:32:59Z
2018-07-06T23:01:49Z
CONTRIBUTOR
null
http://stackoverflow.com/questions/26295861/pandas-tshift-slow-in-groups
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MDU6SXNzdWU0NTU1NzM0Ng==
8,539
Label slices on Series with MultiIndex
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5
2014-10-11T17:33:24Z
2014-10-13T11:51:28Z
2014-10-11T18:34:21Z
NONE
null
I have a Series with a MultiIndex like this: ``` In [174]: a Out[174]: hour year weekday workingday 0 2011 0 0 count 4.000000 mean 76.750000 std 53.368998 min 17.000...
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45,558,559
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8,540
Enhancement: XLSB support in read_excel()
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2014-10-11T18:28:48Z
2020-01-20T23:49:14Z
2020-01-20T23:49:14Z
NONE
null
openpyxl and xlrd do not support XLSB. I'm curious if anyone has taken a look at integrating (more like creating) the functionality into Pandas. Looks like it could be a Python package in it self. Spec from Microsoft: http://msdn.microsoft.com/en-us/library/cc313133(v=office.12).aspx
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8,541
BUG: Plot with ``label`` would overwrite index name
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2014-10-11T19:51:12Z
2017-04-05T02:06:11Z
2014-10-28T03:56:19Z
CONTRIBUTOR
null
Closes https://github.com/pydata/pandas/issues/8494 I took the easy solution and just copied the series. Alternatively we could attach a label property to the MPLObject, and check that wherever we check the index name.
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8,542
groupby, TimeGrouper error
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2014-10-11T22:16:59Z
2016-04-29T13:40:30Z
2016-04-29T13:40:30Z
NONE
null
The following code seems to raise an error, since the result object does not make sense (well, at least to me): ``` In [61]: import datetime In [62]: import pandas as pd In [63]: df = pd.DataFrame.from_records ( [[datetime.datetime(2014,9,10),1234,"start"], [datetime.datetime(2013,10,10),1234,"start"]], columns = ...
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8,543
PERF: Slowness in multi-level indexes with datetime levels
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1
2014-10-12T00:59:45Z
2014-10-13T11:36:56Z
2014-10-13T11:36:56Z
CONTRIBUTOR
null
A MultiIndex with a DatetimeIndex level is slower than a similar index with numeric levels: ``` lev1 = range(10000) lev2 = range(100) mi = pd.MultiIndex.from_product([lev1, lev2]) %time mi.values ``` CPU times: user 571 ms, sys: 41 ms, total: 612 ms Wall time: 612 ms ``` lev1 = range(10000) lev2 = pd.date_range('1/1...
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PERF: Performance improvement for MultiIndexes with a DatetimeIndex levels
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2014-10-12T01:56:02Z
2014-10-13T15:32:55Z
2014-10-13T11:36:39Z
CONTRIBUTOR
null
Addresses #8543. The benefits are most pronounced when there are a small number of distinct datetimes relative to the number of rows in the index. vbench results with `-r multi`: ``` ------------------------------------------------------------------------------- Test name | head[ms]...
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MDU6SXNzdWU0NTU2OTcyNw==
8,545
SEC: Add security disclosure process to developers page
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17
2014-10-12T04:37:14Z
2021-02-03T21:23:26Z
null
CONTRIBUTOR
null
http://pandas.pydata.org/developers.html - https://mail.python.org/mailman/listinfo/pandas-dev Examples: - https://en.wikipedia.org/wiki/Responsible_disclosure - https://docs.djangoproject.com/en/dev/internals/security/#reporting-security-issues
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8,546
BUG - to_excel() fails using xlsxwriter if the index uses local timestamps
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2014-10-13T04:46:47Z
2014-10-13T11:41:39Z
2014-10-13T11:39:25Z
NONE
null
``` python In [93]: ts= pd.Timestamp(datetime.datetime(2014, 1,1)).tz_localize( ...: 'America/New_York') ...: df=pd.DataFrame([1],index=[ts]) ...: df Out[93]: 0 2014-01-01 00:00:00-05:00 1 In [94]: df.to_excel('/home/yank/2.xls') TypeError: can't subtract offset-naive and o...
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PERF: upgrade khash lib to 0.2.8
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2014-10-13T08:18:02Z
2015-05-09T16:07:17Z
2015-05-09T16:07:17Z
CONTRIBUTOR
null
This should close #8524. The idea is that quadratic probing `(i**2 + i)/2` is faster than double hashing and can be shown to traverse all elements if `nbuckets == 2**N`. This branch compiles and passes tests, but I haven't done any benchmarks yet. ## TODO (probably in other issues) - [ ] see if the "flag compression...
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BUG: inconsistent and undocumented option "converters" to read_excel
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2014-10-13T12:31:11Z
2014-11-15T20:38:38Z
2014-11-15T19:01:57Z
NONE
null
Issue #8212 (first part): pandas.read_excel accepts an optional argument "converters" (which is passed down to PythonParser) to convert single cells in columns with a conversion function. I documented this feature and added a try/except block to make it work in case some cells contain NaNs. What's still missing is th...
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8,549
PERF: Slowness in multi-level indexes with datetime levels (part 2)
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1
2014-10-13T16:14:02Z
2014-10-15T18:21:27Z
2014-10-15T18:21:23Z
CONTRIBUTOR
null
Corrects some deficiencies noted here: https://github.com/pydata/pandas/pull/8544#issuecomment-58909397. Adds a test case and an additional vbench test.
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8,550
ENH: Move any/all to NDFrame, support additional arguments for Series. GH8302
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13
2014-10-13T17:39:48Z
2014-11-11T14:33:25Z
2014-11-11T14:32:45Z
CONTRIBUTOR
null
closes #8302 - Move any/all implementations from DataFrame to NDFrame, adding support for Series - Special case single dimension case in NDFrame, to handle numpy.any/all specific arguments - Add assorted NotImplementedErrors in cases where arguments are ignored (including in preexisting _reduce functions) - Move the ot...
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8,551
ENH: Add ISO3 ctry codes and error arg. Fix tests, warn/exception logic #8482
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32
2014-10-13T21:58:19Z
2015-02-09T00:43:38Z
2014-10-28T00:25:36Z
CONTRIBUTOR
null
This PR adds ISO 3-digit country codes, support for World Bank Country Code exceptions, by changing the error handling and warning logic and introducing an `error` argument which toggles between ignore/warn/raise . Validation no longer filters bad country codes, prior to submitting the API request. Instead, it attempt...
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8,552
Added footer to read_html
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18
2014-10-13T22:17:09Z
2014-12-06T21:13:56Z
2014-12-06T17:09:37Z
CONTRIBUTOR
null
read_html neglected table footers. Although rare, some sites use the footer for data. First time pull request so hopefully not messed up.
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8,553
No roundtrip for pd.Panel when writing to excel.
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2
2014-10-14T15:22:41Z
2018-07-06T20:21:05Z
2017-07-11T09:54:58Z
CONTRIBUTOR
null
Currently `pd.read_excel` only allows reading in `DataFrame`s. To read a Panel back in (after `pnl.to_excel(fl)`) one has to loop over the sheets.
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8,554
Inconsistent Timestamp arithmetic
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2014-10-14T20:31:39Z
2018-08-14T10:49:11Z
2018-08-14T10:49:11Z
NONE
null
Subtracting a scalar datetime from a series returns timedeltas, but doesn't do the same for a dataframe. ``` import pandas as pd series = pd.Series(pd.date_range('2000-1-1', periods=100), index=range(0, 100)) df = pd.DataFrame(series) date = pd.Timestamp('1995-1-1') series - date #0 1826 days ...
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8,555
BUG: Index name lost when using .loc with list of indices
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2014-10-14T21:57:33Z
2014-10-15T13:41:14Z
2014-10-14T22:13:05Z
CONTRIBUTOR
null
When using DataFrame.loc with a list of indices, the index name is missing from the resultant DataFrame unless the list of indices includes all of the indices in the original DataFrame. Example: ``` python import pandas as pd d=pd.DataFrame( [ [1,2,3], [4,5,6], [7,8,9] ], columns=...
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8,556
DatetimeIndex very slow repr performance
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6
2014-10-15T00:14:08Z
2014-10-15T01:35:43Z
2014-10-15T01:24:00Z
MEMBER
null
Hi folks, it's been a while. I would like to draw your attention to: ``` dr = pd.date_range('20000101', freq='D', periods=100000) %time dr._is_dates_only ``` This takes about 500ms on my machine. Scales linearly with the size of the index (I interrupted a repr on a 5mm-length index and discovered this). Probably a go...
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8,557
PERF: fixup datetime_index repr perf (GH8556)
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0
2014-10-15T00:56:51Z
2014-10-15T01:24:00Z
2014-10-15T01:24:00Z
CONTRIBUTOR
null
closes #8556 low hanging fruit (and now is pretty scale independent). ``` In [1]: dr = pd.date_range('20000101', freq='D', periods=100000) In [2]: %timeit dr._is_dates_only 10000000 loops, best of 3: 87.6 ns per loop In [3]: pd.__version__ Out[3]: '0.15.0rc1-38-g857042f' ``` I do recall this slipping in sometime ...
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8,558
VIS: plot with `use_index=False` shouldn't plot the index name
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2014-10-15T01:40:20Z
2014-11-16T14:09:36Z
2014-11-16T14:09:36Z
CONTRIBUTOR
null
``` n [1]: df = pd.Series([1, 2, 3], index=['a', 'b', 'c']) In [2]: df.index.name = 'The Index' In [5]: df.plot(use_index=False) Out[5]: <matplotlib.axes._subplots.AxesSubplot at 0x10b1a1438> ``` ![gh](https://cloud.githubusercontent.com/assets/1312546/4639393/2e6af314-540c-11e4-9d07-6c5ab8250aae.png) The x axis la...
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8,559
Zero counts in Series.value_counts for categoricals
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30
2014-10-15T07:14:22Z
2020-09-08T04:13:12Z
2018-07-06T22:49:02Z
NONE
null
`Series.value_counts()` also shows categories with count 0. Thought this would be a bug but according to [doc](http://pandas.pydata.org/pandas-docs/version/0.15.0/categorical.html#operations) it is intentional. This makes the output of value_counts inconsistent when switching between category and non-category dtype. ...
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8,560
df.query() doesn't follow python truthy-ness?
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2014-10-15T07:55:55Z
2020-08-13T19:05:50Z
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``` python In [44]: df=pd.DataFrame([[0,10],[1,20]],columns=['cat','count']) ...: df Out[44]: cat count 0 0 10 1 1 20 In [45]: df.query('cat') Out[45]: cat count 0 0 10 1 1 20 ``` Expected the first row where cat==0 to be dropped since 0 is Falsey. This unhelpful exception i...
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8,561
DOC/FIX: In R it's still levels...
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1
2014-10-15T16:26:19Z
2014-10-15T17:35:45Z
2014-10-15T17:35:37Z
CONTRIBUTOR
null
There was one repleacement to many: in R it's still "levels" and not "categories". -> one word replacement in the docs
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API: Unify SQLTable code for fallback and SQLAlchemy mode and move differences into database class
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2014-10-15T19:03:15Z
2016-01-20T14:15:53Z
2016-01-20T14:15:53Z
CONTRIBUTOR
null
In discussion of the SQL API in #7960 , it has been suggested that it may be possible to factor out differences in SQLAlchemy and fallback backend . This is an initial attempt to do so. Now `SQLTable` is uncoupled from the backend. `PandasSQL` is base class for `SQLDatabase` (SQLAlchemy backend) and `SQLiteDatabase`...
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DOC: fix formatting read_csv comment kwarg explanation
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2014-10-15T19:23:20Z
2014-10-24T11:16:24Z
2014-10-24T11:16:24Z
MEMBER
null
`\n` -> `\\n` to render correclty (and some other small things)
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ENH: Add type conversion to read_stata and StataReader
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2014-10-15T22:24:29Z
2014-11-12T15:51:49Z
2014-10-17T07:22:32Z
CONTRIBUTOR
null
Added upcasting of numeric types which will default numeric data to either int64 or float64. This option has been enabled by default. closes #8527
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pandas.indexing.IndexingError subclass IndexError
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2014-10-15T22:57:07Z
2018-07-08T14:33:13Z
2018-07-06T22:40:10Z
NONE
null
Would it make sense for IndexingError to subclass IndexError to facilitate duck-typing as well as catching IndexError exceptions?
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Switch default colormap for scatterplot to 'Greys'
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2014-10-16T00:58:38Z
2014-10-28T07:35:24Z
2014-10-16T16:12:20Z
MEMBER
null
In #7780, I added colormap support to scatter, but choose to override the default rainbow colormap (https://github.com/pydata/pandas/pull/7780#issuecomment-49533995). I'm now regreting choosing 'RdBu' as the default colormap. I think a simple black-white colormap is a more conservative and better default choice for co...
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8,567
DOC: ignore_na warning
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1
2014-10-16T01:59:17Z
2014-10-18T12:42:19Z
2014-10-16T12:49:02Z
CONTRIBUTOR
null
Added a warning about the new default behavior of the `ewm*()` differing from prior versions. Also cleaned up some formatting.
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45,985,382
MDU6SXNzdWU0NTk4NTM4Mg==
8,568
df.query doesn't handle negation properly
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2014-10-16T13:29:13Z
2014-10-18T12:56:00Z
2014-10-18T12:56:00Z
NONE
null
``` python In [13]: df=pd.DataFrame([[0,10],[1,20]],columns=['cat','count']) ...: df Out[13]: cat count 0 0 10 1 1 20 In [14]: df.query('cat > 0') Out[14]: cat count 1 1 20 In [15]: df.query('~(cat > 0)') Out[15]: cat count 1 1 20 0 0 10 In [16]: df.query(' not ...
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46,028,052
MDU6SXNzdWU0NjAyODA1Mg==
8,569
BUG: Series.get with Float64Index and numpy nan returns empty Series
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2014-10-16T19:54:37Z
2017-06-08T10:47:33Z
2017-06-08T10:47:32Z
NONE
null
I tried to use series.get(x) (where x is np.nan in some instance) and the result was an empty series. It seems like it should just return None if it can't be found. ``` import pandas as pd import numpy as np series = pd.Series(range(0, 10)) series.get(np.nan) # returns None series = series.reindex(pd.Float64Index(...
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8,570
PERF: improve perf of array_equivalent_object (GH8512)
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2014-10-17T00:44:36Z
2014-10-17T01:19:54Z
2014-10-17T01:19:54Z
CONTRIBUTOR
null
xref #8512
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46,087,406
MDU6SXNzdWU0NjA4NzQwNg==
8,571
API: define __copy__ NDFrame
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14
2014-10-17T10:59:55Z
2018-01-15T14:27:17Z
2018-01-15T12:36:38Z
CONTRIBUTOR
null
from [SO](http://stackoverflow.com/questions/26421221/propogation-of-metadata-from-dataframe-to-series/26423596#26423596) this allows `copy.copy(df)` to work properly by definition 'always' deep ``` __copy__ = copy __deepcopy__ = copy ```
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8,572
DOC/API: document how to use metadata
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2014-10-17T11:04:25Z
2021-04-11T05:20:00Z
null
CONTRIBUTOR
null
from [SO](http://stackoverflow.com/questions/26421221/propogation-of-metadata-from-dataframe-to-series/26423596#26423596) xref #2485 xref #7868 - [ ] documentation (maybe in the cookbook) to start. - [ ] add _metadata to Index - [ ] top-level metadata control (maybe) ``` def unit_meta(self, other, method=None): ...
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8,573
Using resample() with groupby on this DataFrame causes Segmentation Fault
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2014-10-17T13:33:26Z
2016-04-19T12:03:05Z
2016-04-19T12:03:05Z
NONE
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When trying to resample timestamps into 5 minute time slots grouping on an id column (tried both counting and summing aggregation in 'how' parameter). In a DataFrame with TimeSeries data I get a memory crash, i.e. Segmentation Fault. I reduced the DataFrame as far as I could in reproducing the crash. Also noted that i...
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8,574
ENH: Use multiindex levels for function arguments in apply
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2014-10-17T14:11:51Z
2018-07-08T14:33:20Z
2018-07-06T22:38:27Z
CONTRIBUTOR
null
Currently it is easy to apply functions to the data in a row or column using apply. However, when important parameters for the analysis is contained in the multiindex for the row or column being analyzed (that is, the column index when analyzing along a column or the row index when analyzing along a row), there is cur...
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8,575
TST/PERF: optimize tm.makeStringIndex
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2014-10-17T17:17:08Z
2018-07-17T21:28:49Z
2014-10-20T00:58:25Z
CONTRIBUTOR
null
As a performance junkie I benchmark a lot and that involves frequent creation of temporary arrays of significant sizes. I couldn't but notice that `tm.makeStringIndex` is somewhat slow in that regard and this PR should fix that. It also does: ``` * add tm.rands_array(nchars, size) function to generate string arrays ...
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BUG/FIX: Fix dtype inference issue in query
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2
2014-10-18T00:01:47Z
2015-04-30T01:56:20Z
2014-10-18T12:55:27Z
MEMBER
null
closes #8568
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46,162,838
MDExOlB1bGxSZXF1ZXN0MjI5NjM3OTM=
8,577
ENH: Allow columns selection in read_stata
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2
2014-10-18T04:29:06Z
2014-11-12T15:51:47Z
2014-10-20T11:03:40Z
CONTRIBUTOR
null
Allow columns to be selected when importing Stata data files. Closes #7935
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46,174,830
MDU6SXNzdWU0NjE3NDgzMA==
8,578
df.info() incorrectly reports memory use for string data?
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18
2014-10-18T13:25:11Z
2014-10-30T11:19:44Z
2014-10-22T06:18:18Z
NONE
null
Doubling the string size does not change the reported memory use: ``` python In [64]: d=pd.DataFrame(["%06d" %x for x in range(1000000)]) ...: d.info() <class 'pandas.core.frame.DataFrame'> Int64Index: 1000000 entries, 0 to 999999 Data columns (total 1 columns): 0 1000000 non-null object dtypes: object(1) memor...
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46,189,685
MDExOlB1bGxSZXF1ZXN0MjI5NzM5NjI=
8,579
DOC: fix example of GH8512 name clash with following examples
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46,198,567
MDU6SXNzdWU0NjE5ODU2Nw==
8,580
BUG: remove data dump from repr of methods on pandas objects
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5
2014-10-19T06:48:18Z
2014-10-28T13:58:15Z
2014-10-28T13:58:15Z
NONE
null
``` python In [10]: df=pd.DataFrame([range(100)]*100) ...: df.transpose Out[10]: <bound method DataFrame.transpose of 0 1 2 3 4 5 6 7 8 9 ... 90 91 92 93 94 95 96 97 98 99 0 0 1 2 3 4 5 6 7 8 9 ... 90 91 92 93 94 95 96 97 98 99 1 0 1 2 3 4 ...
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https://api.github.com/repos/pandas-dev/pandas/issues/8581
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46,205,657
MDU6SXNzdWU0NjIwNTY1Nw==
8,581
BUG: Error in gbq.py
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8
2014-10-19T13:24:31Z
2014-10-30T11:19:44Z
2014-10-20T22:18:25Z
NONE
null
Hi, ``` python from pandas.io import gbq ``` gives the following error: ``` python >>> from pandas.io import gbq Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python2.7/site-packages/pandas/__init__.py", line 45, in <module> from pandas.io.api import * File ...
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46,208,111
MDU6SXNzdWU0NjIwODExMQ==
8,582
groupby with as_index=False, inconsistency between max and idxmax
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0
2014-10-19T15:18:41Z
2014-10-30T11:19:44Z
2014-10-28T00:04:25Z
CONTRIBUTOR
null
``` >>> df = pd.DataFrame(np.random.randint(0, 100, (50, 2)), columns=['jim', 'joe']) >>> ts = pd.Series(np.random.randint(0, 3, 50)) >>> df.groupby(ts, as_index=False).idxmax() jim joe 0 25 36 1 22 5 2 3 4 >>> df.groupby(ts, as_index=False).max() NaN jim joe 0 0 93 94 1 1 94 89 2 ...
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8,583
DOC/REL: adapt make.py file to upload with other user than pandas
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2014-10-19T20:38:48Z
2014-10-30T11:20:23Z
2014-10-22T20:43:54Z
MEMBER
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46,217,212
MDU6SXNzdWU0NjIxNzIxMg==
8,584
BUG: Passing multiple levels to stack when having mixed integer/string level names
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5
2014-10-19T20:57:14Z
2014-11-17T15:24:10Z
2014-11-17T15:24:10Z
MEMBER
null
Related #7770 Using the example of the docs (http://pandas.pydata.org/pandas-docs/stable/reshaping.html#multiple-levels): ``` columns = MultiIndex.from_tuples([('A', 'cat', 'long'), ('B', 'cat', 'long'), ('A', 'dog', 'short'), ('B', 'dog', 'short')], names=['exp', 'animal', 'hair_le...
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8,585
BUG: column name conflict & as_index=False breaks groupby ops
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2014-10-19T21:00:29Z
2014-12-07T13:23:35Z
2014-10-28T00:04:25Z
CONTRIBUTOR
null
closes https://github.com/pydata/pandas/issues/7115 closes https://github.com/pydata/pandas/issues/8112 closes https://github.com/pydata/pandas/issues/8582
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8,586
DOC/REL: clean-up and restructure v0.15.0 whatsnew file (GH8477)
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9
2014-10-19T21:04:51Z
2014-10-30T11:20:23Z
2014-10-27T14:42:02Z
MEMBER
null
Closes #8477 What did I change: - some general clean-up (blank lines, ..) - put the different new feature sections in front (as also in the highlights section) - the 2-level menu structure as discussed in #8477 - API section: move some entries to the 'enhancements' section (entries that were not 'real' (in sense of ...
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8,587
BUG: LooseVersion was used incorrectly
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2014-10-20T00:50:35Z
2014-10-30T11:20:23Z
2014-10-20T12:23:30Z
CONTRIBUTOR
null
closes #8581 Version comparison had a formatting error resulting in "TypeError: expected string or buffer" and preventing Spyder from loading (and probably other issues). Fixed.
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8,588
DOC/API: clarify groupby sorting behavior
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2014-10-20T12:11:05Z
2015-09-05T22:20:25Z
2015-09-05T22:20:25Z
CONTRIBUTOR
null
clarify / doc / test (explicity) on passing `sort=True|False` to a `groupby/resample` from [SO](http://stackoverflow.com/questions/26456125/python-pandas-is-order-preserved-when-using-groupby-and-agg/26465555#26465555resample forces a sort) groupby only sorts if sort is True and the index is NOT monotonic. just like ...
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8,589
cut/qcut "retbins" broken in 0.15.0
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2
2014-10-20T17:20:06Z
2014-10-30T11:19:44Z
2014-10-24T18:36:38Z
CONTRIBUTOR
null
Works in 0.14.1: ``` python In [11]: s = pd.Series(np.random.randn(100)) In [12]: pd.cut(s, 10, retbins=True) Out[12]: ( (0.993, 1.376] (-0.924, -0.541] (-0.158, 0.226] (-1.695, -1.308] (-0.924, -0.541] (-0.541, -0.158] (-0.158, 0.226] (-0.541, -0.158] (0.609, 0.993] (0.226, 0.609] (0.2...
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8,590
ENH: improve bigquery connector to optionally allow use of gcloud credentials
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42
2014-10-21T01:06:54Z
2015-05-14T15:52:50Z
2015-05-09T16:08:56Z
NONE
null
closes #8489 The pandas google bigquery connector can be difficult to use from an ipython notebook: when no authentication token exists, it fails silently (and can hang the notebook). This happens because the oauth2client library is trying to bring up a browser on the console, to request an auth token. This PR pro...
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8,591
Pandas 15.0: TypeError: can't pickle busdaycalendar objects
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2014-10-21T01:12:19Z
2014-10-31T20:18:44Z
2014-10-31T20:18:44Z
NONE
null
Using the documentation's own CustomBusinessDay example, you can no longer save objects with a CustomBusinessDay frequency to an HDF store in Pandas 15.0 Final (but worked in 14.1): ``` python import pandas as pd import numpy as np from pandas.tseries.offsets import CustomBusinessDay from datetime import datetime week...
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8,592
ENH: Raise error in certain unhandled _reduce cases.
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2014-10-21T03:14:00Z
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8,593
API: specification of functions in .agg
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2014-10-21T11:57:10Z
2021-04-11T05:21:06Z
null
CONTRIBUTOR
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- [ ] `pd.Summary` - [x] dict-of-dict #9052 - [ ] named functions #10100 From [SO](http://stackoverflow.com/questions/26456125/python-pandas-is-order-preserved-when-using-groupby-and-agg/26465555?noredirect=1#comment41593401_26465555) ``` In [100]: df = pd.DataFrame({'A': ['group1', 'group1', 'group2', 'group2', 'gr...
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8,594
Series.drop() with MultiIndex: inconsistent behaviour
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2014-10-21T12:28:00Z
2019-12-26T13:35:09Z
2019-12-26T13:35:09Z
NONE
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The behaviour below occurs in versions `'0.15.0rc1-21-g32c5016'` and `'0.14.1'`. When the `label` passed to the `drop` method of a `Series` is not in the axis: (a) if the index is not a `MultiIndex` then an exception is raised (in most cases; see issue #8530) (b) if the index is a `MultiIndex` then an exception is not...
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46,392,842
MDU6SXNzdWU0NjM5Mjg0Mg==
8,595
API: cut interval formatting
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11
2014-10-21T13:26:30Z
2018-07-06T22:19:16Z
2018-07-06T22:19:16Z
NONE
null
it would be nice to have number in front of all labels. put number like 00, 01, 02 in front of labels so that it would order appropriately. Lib\site-packages\pandas\tools\tile.py ``` def _format_levels(bins, prec, right=True, include_lowest=False): fmt = lambda v: _format_label(v, precision=pre...
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46,428,546
MDU6SXNzdWU0NjQyODU0Ng==
8,596
BUG: DataFrame outer merge changes key columns from int64 to float64
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18
2014-10-21T18:38:30Z
2020-03-15T11:20:13Z
2016-05-27T12:41:32Z
CONTRIBUTOR
null
``` import pandas as pd df1 = pd.DataFrame({'key': [1,2,3,4], 'val1': [1,2,3,4]}) df2 = pd.DataFrame({'key': [1,2,3,5], 'val2': [1,2,3,4]}) df = df1.merge(df2, how='outer') ``` Was expecting `key` to stay int64, since a merge can't introduce missing key values if none were present in the inputs. ``` print df.dtypes...
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MDU6SXNzdWU0NjQzNjQ5Ng==
8,597
Functions should raise on unexpected keyword arguments in **kwargs
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2014-10-21T19:50:20Z
2018-07-08T14:33:28Z
2018-07-06T22:16:18Z
CONTRIBUTOR
null
A lot of functions in pandas ignore any additional keyword arguments in `**kwargs`. This makes it very easy for unnoticed mistakes in the code, without getting any error; I have personally came across both cases below in my code: ``` >>> def foo(df): ... df.drop('joe', axis=1, inplce=True) # mis-spelling a keywor...
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46,448,244
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8,598
Function pointer misspecified in io documentaion
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2014-10-21T21:40:19Z
2014-10-30T11:20:23Z
2014-10-21T23:20:26Z
CONTRIBUTOR
null
The pointer to `read_sql_query` is not specified correctly in `doc/source/io.rst` .
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8,599
Use '+' to qualify memory usage in df.info() if appropriate
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1
2014-10-22T07:36:49Z
2014-10-30T11:20:23Z
2014-10-22T10:54:40Z
MEMBER
null
This should resolve @kay1793's complaint in #8578.
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8,600
API/PERF: add a performance string-object memory computation
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1
2014-10-22T10:57:00Z
2021-04-11T05:22:09Z
2021-04-11T05:22:09Z
CONTRIBUTOR
null
xref #8599, #8578 allow a nice UX and a more correct estimate of memory usage for object (string) columns prob will require a cythonized evaluation this would replace the need for the '+' on object dtypes for mem usage
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