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working
## What changes were proposed in this pull request?
**binary_classification_metrics_example.py**
LibSVM datasource loads `ml.linalg.SparseVector` whereas the example requires it to be `mllib.linalg.SparseVector`. For the equivalent Scala exmaple, `BinaryClassificationMetricsExample.scala` seems fine.
```
./bin/spark-submit examples/src/main/python/mllib/binary_classification_metrics_example.py
```
```
File ".../spark/examples/src/main/python/mllib/binary_classification_metrics_example.py", line 39, in <lambda>
.rdd.map(lambda row: LabeledPoint(row[0], row[1]))
File ".../spark/python/pyspark/mllib/regression.py", line 54, in __init__
self.features = _convert_to_vector(features)
File ".../spark/python/pyspark/mllib/linalg/__init__.py", line 80, in _convert_to_vector
raise TypeError("Cannot convert type %s into Vector" % type(l))
TypeError: Cannot convert type <class 'pyspark.ml.linalg.SparseVector'> into Vector
```
**status_api_demo.py** (this one does not work on Python 3.4.6)
It's `queue` in Python 3+.
```
PYSPARK_PYTHON=python3 ./bin/spark-submit examples/src/main/python/status_api_demo.py
```
```
Traceback (most recent call last):
File ".../spark/examples/src/main/python/status_api_demo.py", line 22, in <module>
import Queue
ImportError: No module named 'Queue'
```
**bisecting_k_means_example.py**
`BisectingKMeansModel` does not implement `save` and `load` in Python.
```bash
./bin/spark-submit examples/src/main/python/mllib/bisecting_k_means_example.py
```
```
Traceback (most recent call last):
File ".../spark/examples/src/main/python/mllib/bisecting_k_means_example.py", line 46, in <module>
model.save(sc, path)
AttributeError: 'BisectingKMeansModel' object has no attribute 'save'
```
**elementwise_product_example.py**
It calls `collect` from the vector.
```bash
./bin/spark-submit examples/src/main/python/mllib/elementwise_product_example.py
```
```
Traceback (most recent call last):
File ".../spark/examples/src/main/python/mllib/elementwise_product_example.py", line 48, in <module>
for each in transformedData2.collect():
File ".../spark/python/pyspark/mllib/linalg/__init__.py", line 478, in __getattr__
return getattr(self.array, item)
AttributeError: 'numpy.ndarray' object has no attribute 'collect'
```
**These three tests look throwing an exception for a relative path set in `spark.sql.warehouse.dir`.**
**hive.py**
```
./bin/spark-submit examples/src/main/python/sql/hive.py
```
```
Traceback (most recent call last):
File ".../spark/examples/src/main/python/sql/hive.py", line 47, in <module>
spark.sql("CREATE TABLE IF NOT EXISTS src (key INT, value STRING) USING hive")
File ".../spark/python/lib/pyspark.zip/pyspark/sql/session.py", line 541, in sql
File ".../spark/python/lib/py4j-0.10.4-src.zip/py4j/java_gateway.py", line 1133, in __call__
File ".../spark/python/lib/pyspark.zip/pyspark/sql/utils.py", line 69, in deco
pyspark.sql.utils.AnalysisException: 'org.apache.hadoop.hive.ql.metadata.HiveException: MetaException(message:java.lang.IllegalArgumentException: java.net.URISyntaxException: Relative path in absolute URI: file:./spark-warehouse);'
```
**SparkHiveExample.scala**
```
./bin/run-example sql.hive.SparkHiveExample
```
```
Exception in thread "main" org.apache.hadoop.hive.ql.metadata.HiveException: Unable to alter table. java.lang.IllegalArgumentException: java.net.URISyntaxException: Relative path in absolute URI: file:./spark-warehouse
at org.apache.hadoop.hive.ql.metadata.Hive.alterTable(Hive.java:498)
at org.apache.hadoop.hive.ql.metadata.Hive.alterTable(Hive.java:484)
at org.apache.hadoop.hive.ql.metadata.Hive.loadTable(Hive.java:1668)
```
**JavaSparkHiveExample.java**
```
./bin/run-example sql.hive.JavaSparkHiveExample
```
```
Exception in thread "main" org.apache.hadoop.hive.ql.metadata.HiveException: Unable to alter table. java.lang.IllegalArgumentException: java.net.URISyntaxException: Relative path in absolute URI: file:./spark-warehouse
at org.apache.hadoop.hive.ql.metadata.Hive.alterTable(Hive.java:498)
at org.apache.hadoop.hive.ql.metadata.Hive.alterTable(Hive.java:484)
at org.apache.hadoop.hive.ql.metadata.Hive.loadTable(Hive.java:1668)
```
## How was this patch tested?
Manually via
```
./bin/spark-submit examples/src/main/python/mllib/binary_classification_metrics_example.py
```
```
PYSPARK_PYTHON=python3 ./bin/spark-submit examples/src/main/python/status_api_demo.py
```
```
./bin/spark-submit examples/src/main/python/mllib/bisecting_k_means_example.py
```
```
./bin/spark-submit examples/src/main/python/mllib/elementwise_product_example.py
```
```
./bin/spark-submit examples/src/main/python/sql/hive.py
```
```
./bin/run-example sql.hive.JavaSparkHiveExample
```
```
./bin/run-example sql.hive.SparkHiveExample
```
These were found via
```bash
find ./examples/src/main/python -name "*.py" -exec spark-submit {} \;
```
Author: hyukjinkwon <gurwls223@gmail.com>
Closes #16515 from HyukjinKwon/minor-example-fix.
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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.
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