New to spark.

[Anirudh Muhnot]

Hello everyone, I'm Anirudh. I'm fairly new to spark as I've done an online 
specialisation from UC Berkeley. I know how to code in Python but have little 
to no idea about Scala. I want to contribute to Spark, Where do I start and 
how? I'm reading the pull requests at Git Hub but I'm barley able to understand 
them. Can anyone help? Thank you. 
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