Pycon is the Python Conference that you should check out here. Why? Because the 1400 nicest smart developers attend it every year.
It was so awesome that after being there for tutorials (Django Deployment, Web Scraping, Sphinx) and the conference days, I decided on a whim to stay for the sprints, which are 4 days of working with great developers on open source projects such as Django, pip, rtfd, and Flask.
I personally got some great friends out of it, along with a renewed excitement for contributing to open source.