Q:

Problems importing lib in Spark

I was looking for some library providing Fractions for Spark + Scala and found this link . 
I am not sure, if I can use it or that's something unavailable for me?
In spark-shell I'm writing import org.apache.commons.math4.fraction and getting 
<console>:23: error: object math4 is not a member of package org.apache.commons
       import org.apache.commons.math4.fraction

Though I can import org.apache.commons without any troubles.
Could you please explain me what's wrong? Or maybe you could recommend some other lib for Fractions?
Thank you in advance.

A:

You need to download the jar file and use while running the spark-shell
Download the jar file from here.
Now extract in some location 
tar xvf <location of tar/ zip files>

Now start the spark-shell as 
./spark-shell --jars path to this jar file commons-math3-3.6.1.jar

And use as 
import org.apache.commons.math3.fraction

