Naive Bayes prediction

We are now going to implement the Naive Bayes algorithm using mrjob, allowing it to process our dataset. Technically our version will be a reduced version of most Naive Bayes' implementations, without many of the features that you would expect like smoothing small values.

The mrjob package

The mrjob package allows us to create MapReduce jobs that can easily be computed on Amazon's infrastructure. While mrjob sounds like a sedulous addition to the Mr. Men series of children's books, it stands for Map Reduce Job.

You can install mrjob using the following: pip install mrjob
I had to install the filechunkio package separately using conda install -c conda-forge filechunkio, but this will depend on your system setup...