A successful Git branching model
How to Version Control Your Production Machine Learning Models
Ned Batchelder: Getting Started Testing - PyCon 2014 (video tutorial)
Python Tutorial: Unit Testing Your Code with the unittest Module (video tutorial)
TDD is Essential for Good Data Science Here's Why
Testing Your Code (general python TDD)
Instance, Class, and Static Methods
The Right Way to Oversample in Predictive Modeling
How to remove the html/javascript using bs4
Think Stats online in pdf with code examples
MovieTweetings dataset. More about it here and here
Collaborative Filtering-Based Recommendations
The Right Recs Metrics - Different Rating Scales