JIRA: https://issues.apache.org/jira/browse/SPARK-9101

Author: Mateusz Buśkiewicz <mateusz.buskiewicz@getbase.com>

Closes #7499 from sixers/spark-9101 and squashes the following commits:

dd75aa6 [Mateusz Buśkiewicz] [SPARK-9101] [PySpark] Test for selecting null literal
97e3f2f [Mateusz Buśkiewicz] [SPARK-9101] [PySpark] Add missing NullType to _atomic_types in pyspark.sql.types

JIRA: https://issues.apache.org/jira/browse/SPARK-9166

Simply capture and hide `IllegalArgumentException` in Python API.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #7497 from viirya/hide_illegalargument and squashes the following commits:

8324dce [Liang-Chi Hsieh] Fix python style.
9ace67d [Liang-Chi Hsieh] Also check exception message.
8b2ce5c [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into hide_illegalargument
7be016a [Liang-Chi Hsieh] Capture and hide IllegalArgumentException in Python.

It may loss precision in microseconds when using float for it.

Author: Davies Liu <davies@databricks.com>

Closes #7344 from davies/fix_date_test and squashes the following commits:

249ec61 [Davies Liu] fix flaky test

[SPARK-7902] [SPARK-6289] [SPARK-8685] [SQL] [PYSPARK] Refactor of serialization for Python DataFrame

This PR fix the long standing issue of serialization between Python RDD and DataFrame, it change to using a customized Pickler for InternalRow to enable customized unpickling (type conversion, especially for UDT), now we can support UDT for UDF, cc mengxr .

There is no generated `Row` anymore.

Author: Davies Liu <davies@databricks.com>

Closes #7301 from davies/sql_ser and squashes the following commits:

81bef71 [Davies Liu] address comments
e9217bd [Davies Liu] add regression tests
db34167 [Davies Liu] Refactor of serialization for Python DataFrame

This PR fixes the converter for Python DataFrame, especially for DecimalType

Closes #7106

Author: Davies Liu <davies@databricks.com>

Closes #7131 from davies/decimal_python and squashes the following commits:

4d3c234 [Davies Liu] Merge branch 'master' of github.com:apache/spark into decimal_python
20531d6 [Davies Liu] Merge branch 'master' of github.com:apache/spark into decimal_python
7d73168 [Davies Liu] fix conflit
6cdd86a [Davies Liu] Merge branch 'master' of github.com:apache/spark into decimal_python
7104e97 [Davies Liu] improve type infer
9cd5a21 [Davies Liu] run python tests with SPARK_PREPEND_CLASSES
829a05b [Davies Liu] fix UDT in python
c99e8c5 [Davies Liu] fix mima
c46814a [Davies Liu] convert decimal for Python DataFrames

Use UTF-8 to encode the name of column in Python 2, or it may failed to encode with default encoding ('ascii').

This PR also fix a bug when there is Java exception without error message.

Author: Davies Liu <davies@databricks.com>

Closes #7165 from davies/non_ascii and squashes the following commits:

02cb61a [Davies Liu] fix tests
3b09d31 [Davies Liu] add encoding in header
867754a [Davies Liu] support non-ascii character in column names

Capture the AnalysisException in SQL, hide the long java stack trace, only show the error message.

cc rxin

Author: Davies Liu <davies@databricks.com>

Closes #7135 from davies/ananylis and squashes the following commits:

dad7ae7 [Davies Liu] add comment
ec0c0e8 [Davies Liu] Update utils.py
cdd7edd [Davies Liu] add doc
7b044c2 [Davies Liu] fix python 3
f84d3bd [Davies Liu] capture SQL AnalysisException in Python API

I've added functionality to create new StructType similar to how we add parameters to a new SparkContext.

I've also added tests for this type of creation.

Author: Ilya Ganelin <ilya.ganelin@capitalone.com>

Closes #6686 from ilganeli/SPARK-8056B and squashes the following commits:

27c1de1 [Ilya Ganelin] Rename
467d836 [Ilya Ganelin] Removed from_string in favor of _parse_Datatype_json_value
5fef5a4 [Ilya Ganelin] Updates for type parsing
4085489 [Ilya Ganelin] Style errors
3670cf5 [Ilya Ganelin] added string to DataType conversion
8109e00 [Ilya Ganelin] Fixed error in tests
41ab686 [Ilya Ganelin] Fixed style errors
e7ba7e0 [Ilya Ganelin] Moved some python tests to tests.py. Added cleaner handling of null data type and added test for correctness of input format
15868fa [Ilya Ganelin] Fixed python errors
b79b992 [Ilya Ganelin] Merge remote-tracking branch 'upstream/master' into SPARK-8056B
a3369fc [Ilya Ganelin] Fixing space errors
e240040 [Ilya Ganelin] Style
bab7823 [Ilya Ganelin] Constructor error
73d4677 [Ilya Ganelin] Style
4ed00d9 [Ilya Ganelin] Fixed default arg
67df57a [Ilya Ganelin] Removed Foo
04cbf0c [Ilya Ganelin] Added comments for single object
0484d7a [Ilya Ganelin] Restored second method
6aeb740 [Ilya Ganelin] Style
689e54d [Ilya Ganelin] Style
f497e9e [Ilya Ganelin] Got rid of old code
e3c7a88 [Ilya Ganelin] Fixed doctest failure
a62ccde [Ilya Ganelin] Style
966ac06 [Ilya Ganelin] style checks
dabb7e6 [Ilya Ganelin] Added Python tests
a3f4152 [Ilya Ganelin] added python bindings and better comments
e6e536c [Ilya Ganelin] Added extra space
7529a2e [Ilya Ganelin] Fixed formatting
d388f86 [Ilya Ganelin] Fixed small bug
c4e3bf5 [Ilya Ganelin] Reverted to using parse. Updated parse to support long
d7634b6 [Ilya Ganelin] Reverted to fromString to properly support types
22c39d5 [Ilya Ganelin] replaced FromString with DataTypeParser.parse. Replaced empty constructor initializing a null to have it instead create a new array to allow appends to it.
faca398 [Ilya Ganelin] [SPARK-8056] Replaced default argument usage. Updated usage and code for DataType.fromString
1acf76e [Ilya Ganelin] Scala style
e31c674 [Ilya Ganelin] Fixed bug in test
8dc0795 [Ilya Ganelin] Added tests for creation of StructType object with new methods
fdf7e9f [Ilya Ganelin] [SPARK-8056] Created add methods to facilitate building new StructType objects.

I compared PySpark DataFrameReader/Writer against Scala ones. `Option` function is missing in both reader and writer, but the rest seems to all match.

I added `Option` to reader and writer and updated the `pyspark-sql` test.

Author: Cheolsoo Park <cheolsoop@netflix.com>

Closes #7078 from piaozhexiu/SPARK-8355 and squashes the following commits:

c63d419 [Cheolsoo Park] Fix version
524e0aa [Cheolsoo Park] Add option function to df reader and writer

It's a common mistake that user will put Column in a boolean expression (together with `and` , `or`), which does not work as expected, we should raise a exception in that case, and suggest user to use `&`, `|` instead.

Author: Davies Liu <davies@databricks.com>

Closes #6961 from davies/column_bool and squashes the following commits:

9f19beb [Davies Liu] update message
af74bd6 [Davies Liu] fix tests
07dff84 [Davies Liu] address comments, fix tests
f70c08e [Davies Liu] raise Exception if column is used in booelan expression

[SPARK-8532] [SQL] In Python's DataFrameWriter, save/saveAsTable/json/parquet/jdbc always override mode

https://issues.apache.org/jira/browse/SPARK-8532

This PR has two changes. First, it fixes the bug that save actions (i.e. `save/saveAsTable/json/parquet/jdbc`) always override mode. Second, it adds input argument `partitionBy` to `save/saveAsTable/parquet`.

Author: Yin Huai <yhuai@databricks.com>

Closes #6937 from yhuai/SPARK-8532 and squashes the following commits:

f972d5d [Yin Huai] davies's comment.
d37abd2 [Yin Huai] style.
d21290a [Yin Huai] Python doc.
889eb25 [Yin Huai] Minor refactoring and add partitionBy to save, saveAsTable, and parquet.
7fbc24b [Yin Huai] Use None instead of "error" as the default value of mode since JVM-side already uses "error" as the default value.
d696dff [Yin Huai] Python style.
88eb6c4 [Yin Huai] If mode is "error", do not call mode method.
c40c461 [Yin Huai] Regression test.

Spark SQL does not support timezone, and Pyrolite does not support timezone well. This patch will convert datetime into POSIX timestamp (without confusing of timezone), which is used by SQL. If the datetime object does not have timezone, it's treated as local time.

The timezone in RDD will be lost after one round trip, all the datetime from SQL will be local time.

Because of Pyrolite, datetime from SQL only has precision as 1 millisecond.

This PR also drop the timezone in date, convert it to number of days since epoch (used in SQL).

Author: Davies Liu <davies@databricks.com>

Closes #6250 from davies/tzone and squashes the following commits:

44d8497 [Davies Liu] add timezone support for DateType
99d9d9c [Davies Liu] use int for timestamp
10aa7ca [Davies Liu] Merge branch 'master' of github.com:apache/spark into tzone
6a29aa4 [Davies Liu] support datetime with timezone

1. range() overloaded in SQLContext.scala
2. range() modified in python sql context.py
3. Tests added accordingly in DataFrameSuite.scala and python sql tests.py

Author: animesh <animesh@apache.spark>

Closes #6609 from animeshbaranawal/SPARK-7980 and squashes the following commits:

935899c [animesh] SPARK-7980:python+scala changes

Author: Reynold Xin <rxin@databricks.com>

Closes #6601 from rxin/python-read-write-test-and-doc and squashes the following commits:

baa8ad5 [Reynold Xin] Code review feedback.
f081d47 [Reynold Xin] More documentation updates.
c9902fa [Reynold Xin] [SPARK-8060] Improve DataFrame Python reader/writer interface doc and testing.

Author: Davies Liu <davies@databricks.com>

Closes #6532 from davies/decimal and squashes the following commits:

c7fcbce [Davies Liu] Update tests.py
1425359 [Davies Liu] DecimalType should not be singleton

1. ntile should take an integer as parameter.
2. Added Python API (based on #6364)
3. Update documentation of various DataFrame Python functions.

Author: Davies Liu <davies@databricks.com>
Author: Reynold Xin <rxin@databricks.com>

Closes #6374 from rxin/window-final and squashes the following commits:

69004c7 [Reynold Xin] Style fix.
288cea9 [Reynold Xin] Update documentaiton.
7cb8985 [Reynold Xin] Merge pull request #6364 from davies/window
66092b4 [Davies Liu] update docs
ed73cb4 [Reynold Xin] [SPARK-7322][SQL] Improve DataFrame window function documentation.
ef55132 [Davies Liu] Merge branch 'master' of github.com:apache/spark into window4
8936ade [Davies Liu] fix maxint in python 3
2649358 [Davies Liu] update docs
778e2c0 [Davies Liu] SPARK-7836 and SPARK-7822: Python API of window functions

cc rxin, please take a quick look, I'm working on tests.

Author: Davies Liu <davies@databricks.com>

Closes #6238 from davies/readwrite and squashes the following commits:

c7200eb [Davies Liu] update tests
9cbf01b [Davies Liu] Merge branch 'master' of github.com:apache/spark into readwrite
f0c5a04 [Davies Liu] use sqlContext.read.load
5f68bc8 [Davies Liu] update tests
6437e9a [Davies Liu] Merge branch 'master' of github.com:apache/spark into readwrite
bcc6668 [Davies Liu] add reader amd writer API in Python

This PR is based on #6081, thanks adrian-wang.

Closes #6081

Author: Daoyuan Wang <daoyuan.wang@intel.com>
Author: Davies Liu <davies@databricks.com>

Closes #6230 from davies/range and squashes the following commits:

d3ce5fe [Davies Liu] add tests
789eda5 [Davies Liu] add range() in Python
4590208 [Davies Liu] Merge commit 'refs/pull/6081/head' of github.com:apache/spark into range
cbf5200 [Daoyuan Wang] let's add python support in a separate PR
f45e3b2 [Daoyuan Wang] remove redundant toLong
617da76 [Daoyuan Wang] fix safe marge for corner cases
867c417 [Daoyuan Wang] fix
13dbe84 [Daoyuan Wang] update
bd998ba [Daoyuan Wang] update comments
d3a0c1b [Daoyuan Wang] add range api()

Add an `explode` function for dataframes and modify the analyzer so that single table generating functions can be present in a select clause along with other expressions.   There are currently the following restrictions:
 - only top level TGFs are allowed (i.e. no `select(explode('list) + 1)`)
 - only one may be present in a single select to avoid potentially confusing implicit Cartesian products.

TODO:
 - [ ] Python

Author: Michael Armbrust <michael@databricks.com>

Closes #6107 from marmbrus/explodeFunction and squashes the following commits:

7ee2c87 [Michael Armbrust] whitespace
6f80ba3 [Michael Armbrust] Update dataframe.py
c176c89 [Michael Armbrust] Merge remote-tracking branch 'origin/master' into explodeFunction
81b5da3 [Michael Armbrust] style
d3faa05 [Michael Armbrust] fix self join case
f9e1e3e [Michael Armbrust] fix python, add since
4f0d0a9 [Michael Armbrust] Merge remote-tracking branch 'origin/master' into explodeFunction
e710fe4 [Michael Armbrust] add java and python
52ca0dc [Michael Armbrust] [SPARK-7548][SQL] Add explode function for dataframes.

Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #6003 from adrian-wang/pynareplace and squashes the following commits:

672efba [Daoyuan Wang] remove py2.7 feature
4a148f7 [Daoyuan Wang] to_replace support dict, value support single value, and add full tests
9e232e7 [Daoyuan Wang] rename scala map
af0268a [Daoyuan Wang] remove na
63ac579 [Daoyuan Wang] add na.replace in pyspark

It's the first step: generalize UnresolvedGetField to support all map, struct, and array
TODO: add `apply` in Scala and `__getitem__` in Python, and unify the `getItem` and `getField` methods to one single API(or should we keep them for compatibility?).

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #5744 from cloud-fan/generalize and squashes the following commits:

715c589 [Wenchen Fan] address comments
7ea5b31 [Wenchen Fan] fix python test
4f0833a [Wenchen Fan] add python test
f515d69 [Wenchen Fan] add apply method and test cases
8df6199 [Wenchen Fan] fix python test
239730c [Wenchen Fan] fix test compile
2a70526 [Wenchen Fan] use _bin_op in dataframe.py
6bf72bc [Wenchen Fan] address comments
3f880c3 [Wenchen Fan] add java doc
ab35ab5 [Wenchen Fan] fix python test
b5961a9 [Wenchen Fan] fix style
c9d85f5 [Wenchen Fan] generalize UnresolvedGetField to support all map, struct, and array

Author: Shiti <ssaxena.ece@gmail.com>

Closes #5867 from Shiti/spark-7295 and squashes the following commits:

71a9913 [Shiti] implementation for bitwise and,or, not and xor on Column with tests and docs

After a discussion on the user mailing list, it was decided to put all UDF's under `o.a.s.sql.functions`

cc rxin

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #5923 from brkyvz/move-math-funcs and squashes the following commits:

a8dc3f7 [Burak Yavuz] address comments
cf7a7bb [Burak Yavuz] [SPARK-7358] Move DataFrame mathfunctions into functions

Author: 云峤 <chensong.cs@alibaba-inc.com>
Author: kaka1992 <kaka_1992@163.com>

Closes #5839 from kaka1992/master and squashes the following commits:

b15360d [kaka1992] Fix python unit test in sql/test. =_= I forget to commit this file last time.
f928816 [kaka1992] Fix python style in sql/test.
d2e7f72 [kaka1992] Fix python style in sql/test.
c54d904 [kaka1992] Fix empty map bug.
7e64d1e [云峤] Update
7b9b858 [云峤] undo
f080f8d [云峤] update pep8
76f0c51 [云峤] Merge remote-tracking branch 'remotes/upstream/master'
7d62368 [云峤] [SPARK-7294] ADD BETWEEN
baf839b [云峤] [SPARK-7294] ADD BETWEEN
d11d5b9 [云峤] [SPARK-7294] ADD BETWEEN

Computes a pair-wise frequency table of the given columns. Also known as cross-tabulation.
cc mengxr rxin

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #5842 from brkyvz/df-cont and squashes the following commits:

a07c01e [Burak Yavuz] addressed comments v4.1
ae9e01d [Burak Yavuz] fix test
9106585 [Burak Yavuz] addressed comments v4.0
bced829 [Burak Yavuz] fix merge conflicts
a63ad00 [Burak Yavuz] addressed comments v3.0
a0cad97 [Burak Yavuz] addressed comments v3.0
6805df8 [Burak Yavuz] addressed comments and fixed test
939b7c4 [Burak Yavuz] lint python
7f098bc [Burak Yavuz] add crosstab pyTest
fd53b00 [Burak Yavuz] added python support for crosstab
27a5a81 [Burak Yavuz] implemented crosstab

submitting this PR from a phone, excuse the brevity.
adds Pearson correlation to Dataframes, reusing the covariance calculation code

cc mengxr rxin

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #5858 from brkyvz/df-corr and squashes the following commits:

285b838 [Burak Yavuz] addressed comments v2.0
d10babb [Burak Yavuz] addressed comments v0.2
4b74b24 [Burak Yavuz] Merge branch 'master' of github.com:apache/spark into df-corr
4fe693b [Burak Yavuz] addressed comments v0.1
a682d06 [Burak Yavuz] ready for PR

The python api for DataFrame's plus addressed your comments from previous PR.
rxin

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #5859 from brkyvz/df-freq-py2 and squashes the following commits:

f9aa9ce [Burak Yavuz] addressed comments v0.1
4b25056 [Burak Yavuz] added python api for freqItems

Added the calculation of covariance between two columns to DataFrames.

cc mengxr rxin

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #5825 from brkyvz/df-cov and squashes the following commits:

cb18046 [Burak Yavuz] changed to sample covariance
f2e862b [Burak Yavuz] fixed failed test
51e39b8 [Burak Yavuz] moved implementation
0c6a759 [Burak Yavuz] addressed math comments
8456eca [Burak Yavuz] fix pyStyle3
aa2ad29 [Burak Yavuz] fix pyStyle2
4e97a50 [Burak Yavuz] Merge branch 'master' of github.com:apache/spark into df-cov
e3b0b85 [Burak Yavuz] addressed comments v0.1
a7115f1 [Burak Yavuz] fix python style
7dc6dbc [Burak Yavuz] reorder imports
408cb77 [Burak Yavuz] initial commit

Adds the functions `rand` (Uniform Dist) and `randn` (Normal Dist.) as expressions to DataFrames.

cc mengxr rxin

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #5819 from brkyvz/df-rng and squashes the following commits:

50d69d4 [Burak Yavuz] add seed for test that failed
4234c3a [Burak Yavuz] fix Rand expression
13cad5c [Burak Yavuz] couple fixes
7d53953 [Burak Yavuz] waiting for hive tests
b453716 [Burak Yavuz] move radn with seed down
03637f0 [Burak Yavuz] fix broken hive func
c5909eb [Burak Yavuz] deleted old implementation of Rand
6d43895 [Burak Yavuz] implemented random generators

Adds support for the math functions for DataFrames in PySpark.

rxin I love Davies.

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #5750 from brkyvz/python-math-udfs and squashes the following commits:

7c4f563 [Burak Yavuz] removed is_math
3c4adde [Burak Yavuz] cleanup imports
d5dca3f [Burak Yavuz] moved math functions to mathfunctions
25e6534 [Burak Yavuz] addressed comments v2.0
d3f7e0f [Burak Yavuz] addressed comments and added tests
7b7d7c4 [Burak Yavuz] remove tests for removed methods
33c2c15 [Burak Yavuz] fixed python style
3ee0c05 [Burak Yavuz] added python functions

This PR try to speed up some python tests:

```
tests.py                       144s -> 103s      -41s
mllib/classification.py         24s -> 17s        -7s
mllib/regression.py             27s -> 15s       -12s
mllib/tree.py                   27s -> 13s       -14s
mllib/tests.py                  64s -> 31s       -33s
streaming/tests.py             185s -> 84s      -101s
```
Considering python3, the total saving will be 558s (almost 10 minutes) (core, and streaming run three times, mllib runs twice).

During testing, it will show used time for each test file:
```
Run core tests ...
Running test: pyspark/rdd.py ... ok (22s)
Running test: pyspark/context.py ... ok (16s)
Running test: pyspark/conf.py ... ok (4s)
Running test: pyspark/broadcast.py ... ok (4s)
Running test: pyspark/accumulators.py ... ok (4s)
Running test: pyspark/serializers.py ... ok (6s)
Running test: pyspark/profiler.py ... ok (5s)
Running test: pyspark/shuffle.py ... ok (1s)
Running test: pyspark/tests.py ... ok (103s)   144s
```

Author: Reynold Xin <rxin@databricks.com>
Author: Xiangrui Meng <meng@databricks.com>

Closes #5605 from rxin/python-tests-speed and squashes the following commits:

d08542d [Reynold Xin] Merge pull request #14 from mengxr/SPARK-6953
89321ee [Xiangrui Meng] fix seed in tests
3ad2387 [Reynold Xin] Merge pull request #5427 from davies/python_tests

This PR enable auto_convert in JavaGateway, then we could register a converter for a given types, for example, date and datetime.

There are two bugs related to auto_convert, see [1] and [2], we workaround it in this PR.

[1]  https://github.com/bartdag/py4j/issues/160
[2] https://github.com/bartdag/py4j/issues/161

cc rxin JoshRosen

Author: Davies Liu <davies@databricks.com>

Closes #5570 from davies/py4j_date and squashes the following commits:

eb4fa53 [Davies Liu] fix tests in python 3
d17d634 [Davies Liu] rollback changes in mllib
2e7566d [Davies Liu] convert tuple into ArrayList
ceb3779 [Davies Liu] Update rdd.py
3c373f3 [Davies Liu] support date and datetime by auto_convert
cb094ff [Davies Liu] enable auto convert

```
select(['cola', 'colb'])

groupby(['colA', 'colB'])
groupby([df.colA, df.colB])

df.sort('A', ascending=True)
df.sort(['A', 'B'], ascending=True)
df.sort(['A', 'B'], ascending=[1, 0])
```

cc rxin

Author: Davies Liu <davies@databricks.com>

Closes #5544 from davies/compatibility and squashes the following commits:

4944058 [Davies Liu] add docstrings
adb2816 [Davies Liu] Merge branch 'master' of github.com:apache/spark into compatibility
bcbbcab [Davies Liu] support ascending as list
8dabdf0 [Davies Liu] improve API compatibility to pandas

Support access columns by index in Python:
```
>>> df[df[0] > 3].collect()
[Row(age=5, name=u'Bob')]
```

Access items in ArrayType or MapType
```
>>> df.select(df.l.getItem(0), df.d.getItem("key")).show()
>>> df.select(df.l[0], df.d["key"]).show()
```

Access field in StructType
```
>>> df.select(df.r.getField("b")).show()
>>> df.select(df.r.a).show()
```

Author: Davies Liu <davies@databricks.com>

Closes #5513 from davies/access and squashes the following commits:

e04d5a0 [Davies Liu] Update run-tests-jenkins
7ada9eb [Davies Liu] update timeout
d125ac4 [Davies Liu] check column name, improve scala tests
6b62540 [Davies Liu] fix test
db15b42 [Davies Liu] Merge branch 'master' of github.com:apache/spark into access
6c32e79 [Davies Liu] add scala tests
11f1df3 [Davies Liu] improve accessor for nested types

This PR update PySpark to support Python 3 (tested with 3.4).

Known issue: unpickle array from Pyrolite is broken in Python 3, those tests are skipped.

TODO: ec2/spark-ec2.py is not fully tested with python3.

Author: Davies Liu <davies@databricks.com>
Author: twneale <twneale@gmail.com>
Author: Josh Rosen <joshrosen@databricks.com>

Closes #5173 from davies/python3 and squashes the following commits:

d7d6323 [Davies Liu] fix tests
6c52a98 [Davies Liu] fix mllib test
99e334f [Davies Liu] update timeout
b716610 [Davies Liu] Merge branch 'master' of github.com:apache/spark into python3
cafd5ec [Davies Liu] adddress comments from @mengxr
bf225d7 [Davies Liu] Merge branch 'master' of github.com:apache/spark into python3
179fc8d [Davies Liu] tuning flaky tests
8c8b957 [Davies Liu] fix ResourceWarning in Python 3
5c57c95 [Davies Liu] Merge branch 'master' of github.com:apache/spark into python3
4006829 [Davies Liu] fix test
2fc0066 [Davies Liu] add python3 path
71535e9 [Davies Liu] fix xrange and divide
5a55ab4 [Davies Liu] Merge branch 'master' of github.com:apache/spark into python3
125f12c [Davies Liu] Merge branch 'master' of github.com:apache/spark into python3
ed498c8 [Davies Liu] fix compatibility with python 3
820e649 [Davies Liu] Merge branch 'master' of github.com:apache/spark into python3
e8ce8c9 [Davies Liu] Merge branch 'master' of github.com:apache/spark into python3
ad7c374 [Davies Liu] fix mllib test and warning
ef1fc2f [Davies Liu] fix tests
4eee14a [Davies Liu] Merge branch 'master' of github.com:apache/spark into python3
20112ff [Davies Liu] Merge branch 'master' of github.com:apache/spark into python3
59bb492 [Davies Liu] fix tests
1da268c [Davies Liu] Merge branch 'master' of github.com:apache/spark into python3
ca0fdd3 [Davies Liu] fix code style
9563a15 [Davies Liu] add imap back for python 2
0b1ec04 [Davies Liu] make python examples work with Python 3
d2fd566 [Davies Liu] Merge branch 'master' of github.com:apache/spark into python3
a716d34 [Davies Liu] test with python 3.4
f1700e8 [Davies Liu] fix test in python3
671b1db [Davies Liu] fix test in python3
692ff47 [Davies Liu] fix flaky test
7b9699f [Davies Liu] invalidate import cache for Python 3.3+
9c58497 [Davies Liu] fix kill worker
309bfbf [Davies Liu] keep compatibility
5707476 [Davies Liu] cleanup, fix hash of string in 3.3+
8662d5b [Davies Liu] Merge branch 'master' of github.com:apache/spark into python3
f53e1f0 [Davies Liu] fix tests
70b6b73 [Davies Liu] compile ec2/spark_ec2.py in python 3
a39167e [Davies Liu] support customize class in __main__
814c77b [Davies Liu] run unittests with python 3
7f4476e [Davies Liu] mllib tests passed
d737924 [Davies Liu] pass ml tests
375ea17 [Davies Liu] SQL tests pass
6cc42a9 [Davies Liu] rename
431a8de [Davies Liu] streaming tests pass
78901a7 [Davies Liu] fix hash of serializer in Python 3
24b2f2e [Davies Liu] pass all RDD tests
35f48fe [Davies Liu] run future again
1eebac2 [Davies Liu] fix conflict in ec2/spark_ec2.py
6e3c21d [Davies Liu] make cloudpickle work with Python3
2fb2db3 [Josh Rosen] Guard more changes behind sys.version; still doesn't run
1aa5e8f [twneale] Turned out `pickle.DictionaryType is dict` == True, so swapped it out
7354371 [twneale] buffer --> memoryview  I'm not super sure if this a valid change, but the 2.7 docs recommend using memoryview over buffer where possible, so hoping it'll work.
b69ccdf [twneale] Uses the pure python pickle._Pickler instead of c-extension _pickle.Pickler. It appears pyspark 2.7 uses the pure python pickler as well, so this shouldn't degrade pickling performance (?).
f40d925 [twneale] xrange --> range
e104215 [twneale] Replaces 2.7 types.InstsanceType with 3.4 `object`....could be horribly wrong depending on how types.InstanceType is used elsewhere in the package--see http://bugs.python.org/issue8206
79de9d0 [twneale] Replaces python2.7 `file` with 3.4 _io.TextIOWrapper
2adb42d [Josh Rosen] Fix up some import differences between Python 2 and 3
854be27 [Josh Rosen] Run `futurize` on Python code:
7c5b4ce [Josh Rosen] Remove Python 3 check in shell.py.

Use `f.__repr__()` instead of `f.__name__` when instantiating `UserDefinedFunction`s, so `functools.partial`s may be used.

Author: ksonj <kson@siberie.de>

Closes #5206 from ksonj/partials and squashes the following commits:

ea66f3d [ksonj] Inserted blank lines for PEP8 compliance
d81b02b [ksonj] added tests for udf with partial function and callable object
2c76100 [ksonj] Makes UDFs work with all types of callables
b814a12 [ksonj] support functools.partial as udf

(cherry picked from commit 98f72dfc)
Signed-off-by: Josh Rosen <joshrosen@databricks.com>

This pull request adds variants of DataFrame.na.drop and DataFrame.na.fill to the Scala/Java API, and DataFrame.fillna and DataFrame.dropna to the Python API.

Author: Reynold Xin <rxin@databricks.com>

Closes #5274 from rxin/df-missing-value and squashes the following commits:

4ee1b98 [Reynold Xin] Improve error reporting in Python.
33a330c [Reynold Xin] Remove replace for now.
bc4fdbb [Reynold Xin] Added documentation for replace.
d56f5a5 [Reynold Xin] Added replace for Scala/Java.
2385d00 [Reynold Xin] Feedback from Xiangrui on "how".
914a374 [Reynold Xin] fill with map.
185c67e [Reynold Xin] Allow specifying column subsets in fill.
749eb47 [Reynold Xin] fillna
249b94e [Reynold Xin] Removing undefined functions.
6a73c68 [Reynold Xin] Missing file.
67d7003 [Reynold Xin] [SPARK-6119][SQL] DataFrame.na.drop (Scala/Java) and DataFrame.dropna (Python)

The _eq_ of DataType is not correct, class cache is not use correctly (created class can not be find by dataType), then it will create lots of classes (saved in _cached_cls), never released.

Also, all same DataType have same hash code, there will be many object in a dict with the same hash code, end with hash attach, it's very slow to access this dict (depends on the implementation of CPython).

This PR also improve the performance of inferSchema (avoid the unnecessary converter of object).

cc pwendell  JoshRosen

Author: Davies Liu <davies@databricks.com>

Closes #4808 from davies/leak and squashes the following commits:

6a322a4 [Davies Liu] tests refactor
3da44fc [Davies Liu] fix __eq__ of Singleton
534ac90 [Davies Liu] add more checks
46999dc [Davies Liu] fix tests
d9ae973 [Davies Liu] fix memory leak in sql

select empty should NOT be the same as select. make sure selectExpr is behaving the same.
join param documentation
link to source doesn't work in jekyll generated file
cross reference of columns (i.e. enabling linking)
show(): move df example before df.show()
move tests in SQLContext out of docstring otherwise doc is too long
Column.desc and .asc doesn't have any documentation
in documentation, sort functions.*)

Author: Davies Liu <davies@databricks.com>

Closes #4756 from davies/df_docs and squashes the following commits:

f30502c [Davies Liu] fix doc
32f0d46 [Davies Liu] fix DataFrame docs