Daniel Greenfeld learned Python during his five year tenure at NASA. He is a member of the Python Software Foundation, and works professionally with Python and Django at Cartwheel Web. Working with the chairman of the Python Software Foundation he helps author a series of classes on Python 3 for the O'Reilly School of Technology. He is a co-creator of http://djangopackages.com and the underlying framework, http://opencomparison.org. He has done a lot of work in the field of usability, and does his best to support diversity in the tech community. An experience international speaker, you can see the list of his presentation efforts on lanyrd: http://lanyrd.com/profile/pydanny/past/speaking.