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[MINOR][PYTHON] Fix typo in a docsting of RDD.toDF

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### What changes were proposed in this pull request?

Fixes typo in docsting of `toDF`

### Why are the changes needed?

The third argument of `toDF` is actually `sampleRatio`.
related discussion: https://github.com/apache/spark/pull/12746#discussion-diff-62704834

### Does this PR introduce _any_ user-facing change?

No

### How was this patch tested?

This patch doesn't affect any logic, so existing tests should cover it.

Closes #29551 from unirt/minor_fix_docs.

Authored-by: unirt <lunirtc@gmail.com>
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>
This commit is contained in:
unirt 2020-08-26 10:34:49 -07:00 committed by Dongjoon Hyun
parent a8b568800e
commit d3304268d3
1 changed files with 1 additions and 1 deletions
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python/pyspark/sql/session.py
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@ -43,7 +43,7 @@ def _monkey_patch_RDD(sparkSession):
This is a shorthand for ``spark.createDataFrame(rdd, schema, sampleRatio)``
:param schema: a :class:`pyspark.sql.types.StructType` or list of names of columns
:param samplingRatio: the sample ratio of rows used for inferring
:param sampleRatio: the sample ratio of rows used for inferring
:return: a DataFrame
>>> rdd.toDF().collect()