Ask HN: I've learnt some Python by writing scripts. What now?

Python is my first programming language. By writing shell scripts and solving problems (e.g. FizzBuzz) I have learnt the basics of Python but have run into a wall, I can solve almost any problem I run into as long as all it requires is input and output in a command line but it is very rare for users to be presented with a command line nowadays.

Where do I go from here - How can I expand my knowledge of Python?