python - Contrary of .join() pyspark -

join returns rdd containing pairs of elements matching keys.

https://spark.apache.org/docs/1.6.2/api/python/pyspark.html#pyspark.rdd.join

example:

 truedupsrdd = (rdd1.join(rdd2)) 

how can perform disjoin?

i tried:

notmatchingrdd = (rdd1.join(!rdd2)) 

use subtractbykey:

return each (key, value) pair in c{self} has no pair matching key in c{other}.

rdd1.subtractbykey(rdd2)