[SPARK-9679][ML][PYSPARK] Add Python API for Stop Words Remover

[holdenk]

Add a python API for the Stop Words Remover.

[holdenk]

jenkins, retest this please.

[SparkQA]

Test build #40679 has finished for PR 8118 at commit ec6baab.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
  • * Set thresholds in multiclass (or binary) classification to adjust the probability of
  • class StopWordsRemover(JavaTransformer, HasInputCol, HasOutputCol):

[holdenk]

jenkins, retest this please

[holdenk]

jenkins, retest this please.

[SparkQA]

Test build #40830 has finished for PR 8118 at commit b98bb1d.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #41169 has finished for PR 8118 at commit d8e3672.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[feynmanliang]

Is there a reason why this __init__ doc string breaks the pattern of just repeating the method with default args seen elsewhere in feature.py?

[SparkQA]

Test build #41654 has finished for PR 8118 at commit 84bc507.

• This patch fails Python style tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
  • class StopWordsRemover(JavaTransformer, HasInputCol, HasOutputCol):

[feynmanliang]

Are these prints intentional?

[holdenk]

oh no, I was checking the type when debugging something

[feynmanliang]

some small comments, LGTM after they're fixed

[SparkQA]

Test build #41672 has finished for PR 8118 at commit acfc9fe.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
  • class StopWordsRemover(JavaTransformer, HasInputCol, HasOutputCol):

[holdenk]

jenkins, retest this please.

[SparkQA]

Test build #41679 has finished for PR 8118 at commit 53f97b7.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
  • class StopWordsRemover(JavaTransformer, HasInputCol, HasOutputCol):

[mengxr]

private[spark] should be the same but appears more often

[mengxr]

minor: Since the object is already StopWords, would English be sufficient? We didn't use ENGLISH_STOP_WORDS because it is a mutable array.

[SparkQA]

Test build #41761 has finished for PR 8118 at commit 7767df0.

• This patch fails Python style tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
  • class StopWordsRemover(JavaTransformer, HasInputCol, HasOutputCol):

[SparkQA]

Test build #41764 has finished for PR 8118 at commit 345bde2.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
  • class StopWordsRemover(JavaTransformer, HasInputCol, HasOutputCol):

[mengxr]

LGTM except a minor issue on the test code style.

[SparkQA]

Test build #41848 has finished for PR 8118 at commit 62b821a.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
  • class DCT(JavaTransformer, HasInputCol, HasOutputCol):
  • class SQLTransformer(JavaTransformer):
  • class StopWordsRemover(JavaTransformer, HasInputCol, HasOutputCol):

[mengxr]

Merged into master. Thanks!