How to convert a DataFrame back to normal RDD in pyspark?

Question

I need to use the

(rdd.)partitionBy(npartitions, custom_partitioner)

method that is not available on the DataFrame. All of the DataFrame

Answer 1

Answer given by kennyut/Kistian works very well but to get exact RDD like output when RDD consist of list of attributes e.g. [1,2,3,4] we can use flatmap command as below,

rdd = df.rdd.flatMap(list)
or 
rdd = df.rdd.flatmap(lambda x: list(x))