Khan Academy Python Tutorials

The nonprofit organization Khan Academy began publishing microlections on the Python programming language for beginners. The first lesson is devoted to writing a simple program for calculating factorial using a loop.



PS Khan Academy specializes in mass education. Since 2006, its founder, Salman Khan, has recorded over 2,300 microlonections in the field of science and mathematics. As of June 2011, about 64 million views were recorded on the Khan Academy YouTube channel.
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Khan Academy on YouTube