Resources I use to further develop my python/SQL skills:
YouTube channels
Pydata: Interesting presentations made by python enthusiasts with a focus on best practices and cutting edge technologies and applications [link]
Corey Schafer: Excellent pace for beginners, he has great content for matplotlib, pandas and other fundamental python building blocks [link]
sentdex: early adopter (content is a bit dated) but great content for applying python to finance, among other demonstrated use cases [link]
Ken Jee: nice focus on data science applications [link]
Brad Traversy: inspirational software developer who does a great job at explaining and demonstrating software concepts while also building applications for each video [link]