pyspark.RDD.collectAsMap

RDD.collectAsMap() → Dict[K, V]

Return the key-value pairs in this RDD to the master as a dictionary.

New in version 0.7.0.

Returns

dict

a dictionary of (key, value) pairs

See also

RDD.countByValue()

Notes

This method should only be used if the resulting data is expected to be small, as all the data is loaded into the driver’s memory.

Examples

>>> m = sc.parallelize([(1, 2), (3, 4)]).collectAsMap()
>>> m[1]
2
>>> m[3]
4

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