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PySpark RDD | glom method

Machine Learning
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PySpark
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PySpark RDD
schedule Jul 1, 2022
Last updated
local_offer PySpark
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PySpark RDD's glom() method returns a RDD holding the content of each partition.

Parameters

This method does not take in any parameters.

Return Value

A PySpark RDD (pyspark.rdd.PipelinedRDD).

Examples

Consider the following RDD:

# Create a RDD with 3 partitions
rdd = sc.parallelize(["A","B","C","A"], numSlices=3)
rdd.collect()
['A', 'B', 'C', 'A']

Getting the values of each partition in PySpark RDD

To see the content of these partitions:

rdd.glom().collect()
[['A'], ['B'], ['C', 'A']]

Here:

  • Partition 1 holds 'A'

  • Partition 2 holds 'B'

  • Partition 3 holds 'C' and 'A'

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Published by Isshin Inada
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