python API for Spark is still missing, however there is a git project with a higher level API on top of Spark GraphX called GraphFrames: (GraphFrames) . The project claims: "GraphX is to RDDs as GraphFrames are to DataFrames."
I haven't worked with it, however a quick test of their samples with Spark 1.6.2 worked:
Use pyspark like this:
pyspark --packages graphframes:graphframes:0.2.0-spark1.6-s_2.10
or use zeppelin and add the dependencies to the interpreter configuration.
Maybe this library has what you need.