Google, a notably dedicated user of Python, teaches an intensive 2-day class in Python, which it describes as being "for people with a little bit of programming experience who want to learn Python." The materials for this class, including recorded lectures, written materials and coding exercises, are available online.
Consisting of a series of 4 online courses prepared by the University of Michigan, these courses may be taken at the student's convenience. Unless the student wishes to be granted a certificate at the conclusion of the courses, they may be taken for free.
Aspiring "Pythonistas" may also reference a variety of online "cheat sheets", such as: