The following resources on Big Data would be helpful
Working with Big Data
Courses on Hadoop
Both Yahoo and Google have great tutorials on Hadoop, which go from beginner to quite advanced levels. They don't specifically address using Python, but learning the Hadoop concepts and then applying them in Pydoop or a similar library can yield great results.
Yahoo's tutorial: https://developer.yahoo.com/hadoop/tutorial/
Google's tutorial: https://cloud.google.com/hadoop/what-is-hadoop
Pydoop
URL: http://crs4.github.io/pydoop/tutorial/index.html
Pydoop is a python library to run Hadoop jobs. Pydoop also...