Creating a MongoDB-backed corpus reader
All the corpus readers we've dealt with so far have been file-based. That is in part due to the design of the CorpusReader base class, and also the assumption that most corpus data will be in text files. However, sometimes you'll have a bunch of data stored in a database that you want to access and use just like a text file corpus. In this recipe, we'll cover the case where you have documents in MongoDB, and you want to use a particular field of each document as your block of text.
Getting ready
MongoDB is a document-oriented database that has become a popular alternative to relational databases such as MySQL. The installation and setup of MongoDB is outside the scope of this book, but you can find instructions ...
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