TypeError: list indices must be integers, not str Python
list[s] is a string. Why doesn’t this work?
mapreduce
Reduce a key-value pair into a key-list pair with Apache Spark
I am writing a Spark application and want to combine a set of Key-Value pairs (K, V1), (K, V2), ..., (K, Vn) into one Key-Multivalue pair (K, [V1, V2, ..., Vn]). I feel like I should be able to do this using the reduceByKey function with something of the flavor: