Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/11445#discussion_r54621585
--- Diff: python/pyspark/sql/dataframe.py ---
@@ -267,44 +267,6 @@ def take(self, num):
self._jdf, num)
return list(_load_from_socket(port,
BatchedSerializer(PickleSerializer())))
- @ignore_unicode_prefix
- @since(1.3)
- def map(self, f):
- """ Returns a new :class:`RDD` by applying a the ``f`` function to
each :class:`Row`.
-
- This is a shorthand for ``df.rdd.map()``.
-
- >>> df.map(lambda p: p.name).collect()
- [u'Alice', u'Bob']
- """
- return self.rdd.map(f)
-
- @ignore_unicode_prefix
- @since(1.3)
- def flatMap(self, f):
- """ Returns a new :class:`RDD` by first applying the ``f``
function to each :class:`Row`,
- and then flattening the results.
-
- This is a shorthand for ``df.rdd.flatMap()``.
-
- >>> df.flatMap(lambda p: p.name).collect()
- [u'A', u'l', u'i', u'c', u'e', u'B', u'o', u'b']
- """
- return self.rdd.flatMap(f)
-
- @since(1.3)
- def mapPartitions(self, f, preservesPartitioning=False):
- """Returns a new :class:`RDD` by applying the ``f`` function to
each partition.
-
- This is a shorthand for ``df.rdd.mapPartitions()``.
-
- >>> rdd = sc.parallelize([1, 2, 3, 4], 4)
- >>> def f(iterator): yield 1
- >>> rdd.mapPartitions(f).sum()
- 4
- """
- return self.rdd.mapPartitions(f, preservesPartitioning)
-
--- End diff --
those are fine, since they don't return anything.
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