pyspark.RDD.first

RDD.first() → T

Return the first element in this RDD.

New in version 0.7.0.

Returns

T

the first element

See also

RDD.take()

pyspark.sql.DataFrame.first()

pyspark.sql.DataFrame.head()

Examples

>>> sc.parallelize([2, 3, 4]).first()
2
>>> sc.parallelize([]).first()
Traceback (most recent call last):
    ...
ValueError: RDD is empty

pyspark.RDD.filter pyspark.RDD.flatMap