pyspark.Broadcast

class pyspark.Broadcast(sc=None, value=None, pickle_registry=None, path=None, sock_file=None)

A broadcast variable created with SparkContext.broadcast(). Access its value through value.

Examples

>>> b = spark.sparkContext.broadcast([1, 2, 3, 4, 5])
>>> b.value
[1, 2, 3, 4, 5]
>>> spark.sparkContext.parallelize([0, 0]).flatMap(lambda x: b.value).collect()
[1, 2, 3, 4, 5, 1, 2, 3, 4, 5]
>>> b.unpersist()

>>> large_broadcast = spark.sparkContext.broadcast(range(10000))

Methods

destroy([blocking])	Destroy all data and metadata related to this broadcast variable.
dump(value, f)	Write a pickled representation of value to the open file or socket.
load(file)	Read a pickled representation of value from the open file or socket.
load_from_path(path)	Read the pickled representation of an object from the open file and return the reconstituted object hierarchy specified therein.
unpersist([blocking])	Delete cached copies of this broadcast on the executors.

Attributes

value

Return the broadcasted value